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Boulton AJM, Jensen TS, Luecke T, Petersen EA, Pop-Busui R, Taylor RS, Tesfaye S, Vileikyte L, Ziegler D. Where does spinal cord stimulation fit into the international guidelines for refractory painful diabetic neuropathy? a consensus statement. Diabetes Res Clin Pract 2023; 206 Suppl 1:110763. [PMID: 38245326 DOI: 10.1016/j.diabres.2023.110763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 05/30/2023] [Indexed: 01/22/2024]
Abstract
BACKGROUND Although pharmacotherapy with anticonvulsants and/or antidepressants can be effective for many people with painful diabetic neuropathy (PDN), albeit with frequent side-effects, a critical juncture occurs when neuropathic pain no longer responds to standard first- and second-step mono- and dual therapy and becomes refractory. Subsequent to these pharmacotherapeutic approaches, third-line treatment options for PDN may include opioids (short-term), capsaicin 8% patches, and spinal cord stimulation (SCS). AIM This document summarizes consensus recommendations regarding appropriate treatment for refractory peripheral diabetic neuropathy (PDN), based on outcomes from an expert panel convened on December 10, 2022, as part of the Worldwide Initiative for Diabetes Education Virtual Global Summit, "Advances in the Management of Painful Diabetic Neuropathy." PARTICIPANTS Nine attendees, eminent physicians and academics, comprising six diabetes specialists, two pain specialists, and one health services expert. EVIDENCE For individuals with refractory PDN, opioids are a high-risk option that do not provide a long-term solution and should not be used. For appropriately selected individuals, SCS is an effective, safe, and durable treatment option. In particular, high-frequency (HF) SCS (10 kHz) shows strong efficacy and improves quality of life. To ensure treatment success, strict screening criteria should be used to prioritize candidates for SCS. CONSENSUS PROCESS Each participant voiced their opinion after reviewing available data, and a verbal consensus was reached during the meeting. CONCLUSION Globally, the use of opioids should rarely be recommended for refractory, severe PDN. Based on increasing clinical evidence, SCS, especially HF-SCS, should be considered as a treatment for PDN that is not responsive to first- or second-line monotherapy/dual therapy.
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Affiliation(s)
| | - T S Jensen
- International Diabetic Neuropathy Consortium, Aarhus University, Aarhus, Denmark
| | - T Luecke
- Pain Center, Franziskus Hospital Linz, Vice President, German Pain Society, Linz am Rhein, Germany
| | - E A Petersen
- University of Arkansas for Medical Sciences, AR, USA
| | - R Pop-Busui
- Metabolism, Endocrinology, and Diabetes, University of Michigan, MI, USA
| | | | - S Tesfaye
- Sheffield Teaching Hospitals and the University of Sheffield, Sheffield, UK
| | | | - D Ziegler
- Institute for Clinical Diabetology, German Diabetes Center, Leibniz Center for Diabetes Research at Heinrich Heine University, Düsseldorf, Germany
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Lees JS, Hanlon P, Butterly E, Wild SH, Mair FS, Taylor RS, Guthrie B, Gillies K, Dias S, Welton N, McAllister DA. 963 THE IMPACT OF AGE, SEX AND MORBIDITY COUNT ON EARLY TERMINATION: A META-ANALYSIS OF INDIVIDUAL PATIENT DATA FROM CLINICAL TRIALS. Age Ageing 2022. [DOI: 10.1093/ageing/afac126.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Multimorbidity is found in around half of people with any long-term condition but is substantially less common in randomised controlled trials (‘trials’). Multimorbidity may diminish a participant’s ability to complete a trial. However, empirical estimates of the association between individual patient characteristics and early termination are lacking.
Method
Individual patient-level data were obtained from Phase 3/4 trials contained within two clinical trial repositories. Eligible trials for inclusion were identified according to pre-specified criteria (PROSPERO CRD42018048202). Within each trial, the association between morbidity count and early termination (failure for any reason to complete the final trial visit) was estimated in logistic regression models, adjusting for age and sex. These estimates were meta-analysed in Bayesian linear models, with partial pooling across index conditions and drug classes. Using these estimates, the impact of morbidity count on early termination was modelled for a set of notional trials.
Results
In 92 trials across 20 index conditions and 17 drug classes, the mean morbidity count ranged from 0.3–2.7. Neither age nor sex was associated with early termination (OR 1.04, 95% CI 0.98–1.11; OR 1.00, 95% PI 0.95–1.07 respectively). Morbidity count was associated with early termination (OR per additional morbidity: 1.11, 95% CI: 1.07 to 1.14). There was no evidence of non-linearity in the association between morbidity count and early termination, and there was minimal variation across drug classes and index conditions. For a notional trial with high level of early termination in individuals without multimorbidity, doubling the mean morbidity count from 1 to 2 increases risk of early termination from 29% to 31%.
Conclusion
Multimorbidity, irrespective of age and sex, is associated with a relatively modest increased odds of early termination of trial participation. The benefit of increased generalisability of trials by including patients with multimorbidity appears likely to outweigh the disadvantages of lower retention.
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Thygesen LC, Zinckernagel L, Dalal H, Egstrup K, Glumer C, Gronbaek M, Holmberg T, Kober L, La Cour K, Nakano A, Nielsen CV, Sibilitz KL, Tolstrup JS, Zwisler AD, Taylor RS. Cardiac rehabilitation for patients with heart failure: a national Danish register-based study of predictors of referral and outcomes. Eur J Cardiovasc Nurs 2021. [DOI: 10.1093/eurjcn/zvab060.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Foundation. Main funding source(s): The Danish Heart Foundation
Background
Heart failure (HF) places a large burden on patients and society as a major cause of morbidity, mortality and healthcare costs. Participation in exercise-based cardiac rehabilitation (CR) in people with HF is a clinically and cost-effective strategy and recommended in international clinical guidelines.
Purpose
The aims of this study were to: (1) examine the temporal trends and predictors of national CR referral, and (2) compare the risk of hospital readmission and mortality in those referred for CR compared to no referral.
Methods
All patients in Denmark with incident HF were identified by the Danish Heart Failure Register in the period 2010 to 2018 (n = 33,257) and CR referral assessed within 120 days of hospital admission. Multivariable logistic regression models were used to evaluate the association between CR referral and predictors and to compare risk of hospital readmission and mortality until 1 year between referred and not referred patients.
Results
Overall, 45.0% of HF patients were referred to exercise-based CR, increasing from 31.7% in 2010 to 52.2% in 2018. Factors independently associated with higher CR referral were: NYHA functional class II, LVEF <50%, diagnosis of myocardial infarction and use of ACE inhibitor. Male gender, older age, region, unemployment, retirement, living alone, non-Danish ethnic origin, lower educational level, NYHA class IV, treatment for hypertension, existing chronic obstructive lung disease and stroke were associated with lower CR referral. CR referral was associated with lower risk of readmission (adjusted odds ratio: 0.90;95%CI: 0.85-0.95), HF-specific mortality (0.61; 0.39-0.95) and all-cause mortality (0.61; 0.55-0.69) as compared to no referral.
Conclusions
Although CR referral has increased over time, only some 1 in 2 diagnosed HF patients in Denmark are referred to exercise-based CR. CR referral is associated with lower risk in readmissions and mortality. Strategies to promote CR referral including healthcare professional education on the benefits of CR and alternative methods of CR delivery are urgently needed to improve access to CR, especially for high-risk groups.
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Affiliation(s)
- LC Thygesen
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - L Zinckernagel
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - H Dalal
- University of Exeter Medical School, Knowledge Spa, Royal Cornwall Hospital, Truro, United Kingdom of Great Britain & Northern Ireland
| | - K Egstrup
- Department of Cardiovascular Research, Odense University Hospital, Svendborg, Denmark
| | - C Glumer
- Center for diabetes in the city of Copenhagen, Copenhagen, Denmark
| | - M Gronbaek
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - T Holmberg
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - L Kober
- Department of Cardiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - K La Cour
- Department of Public Health, University of Southern Denmark, Odense, Denmark
| | - A Nakano
- The Danish Clinical Registries (RKKP), Aarhus, Denmark
| | - CV Nielsen
- DEFACTUM, Regional Hospital West Jutland, Central Denmark Region, Institute of Public Health, Aarhus University, Aarhus, Denmark
| | - KL Sibilitz
- Department of Cardiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - JS Tolstrup
- National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark
| | - AD Zwisler
- REHPA The Danish Knowledge Centre for Rehabilitation and Palliative Care, Odense University Hospital, Department of Clinical Research, University of Southern Denmark, Nyborg, Denmark
| | - RS Taylor
- Institute of Health and Well Being, University of Glasgow, Glasgow, United Kingdom of Great Britain & Northern Ireland
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Taams LS, Taylor RS. Clinical & Experimental Immunology: Highlights of 2020. Clin Exp Immunol 2021; 203:1-2. [PMID: 33330972 DOI: 10.1111/cei.13557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
| | - R S Taylor
- British Society for Immunology, Red Lion Square, London, UK
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Lynggaard V, Zwisler AD, Taylor RS, May O, Mortensen J, Nielsen CV. Short- and long-term effects of the patient education strategy-learning and coping-in cardiac rehabilitation: a randomized controlled trial (LC-REHAB). Health Educ Res 2021; 36:41-60. [PMID: 33755118 DOI: 10.1093/her/cyaa051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Accepted: 12/02/2020] [Indexed: 06/12/2023]
Abstract
The objectives were to assess the short- and long-term effect of the patient education strategy 'Learning and Coping' (LC) in cardiac rehabilitation (CR) on health-related quality of life, patient education impact, cardiac risk factors and lifestyle. In total, 825 patients hospitalized with ischaemic heart disease or heart failure were randomized to either LC-CR or standard CR at three Danish hospitals. Teaching approach in LC-CR was situational, inductive and reflective, with experienced patients as co-educators and supplemental interviews. Teaching approach in standard CR was structured and deductive. Outcomes were assessed immediately after CR, and after 3 months (short term), and after 3 years (long term). Between-arm differences in favour of LC-CR were SF-12 'role emotional' (3.7, 95% CI: 0.6-6.8) and MDI depression score (0.9, 0.1-1.8) immediately after CR, exercise capacity (4 W, 1-9) at 3 months and SF-12 'role physical' (4.6, 0.1-9.0) (long term). Between-arm differences in favour of controls were waist circumference (-1.7 cm, -2.3 to -1.0) immediately after CR and HeiQ domain 'Constructive attitudes and approaches' (0.11, 0.04-0.18), triglycerides (-0.12 mmol/l, -0.21 to -0.02), systolic blood pressure (-3.12 mmHg, -5.66 to -0.58) at 3 months. Adding LC strategies to CR provides inconsistent short-term results but improves 'role physical' long term.
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Affiliation(s)
- V Lynggaard
- Cardiovascular Research Unit, Department of Cardiology, Gødstrup Hospital (Formerly known as Regional Hospital West Jutland), 61 Gammel Landevej, 7400 Herning, Denmark
| | - A D Zwisler
- Danish Knowledge Centre for Rehabilitation and Palliative Care, University Hospital Odense and University of Southern Denmark, Nyborg, Denmark
| | - R S Taylor
- Danish Knowledge Centre for Rehabilitation and Palliative Care, University Hospital Odense and University of Southern Denmark, Nyborg, Denmark
- MRC/CSO Social and Public Health Sciences Unit, Robertson Centre for Biostatistics, Institute of Health and Well Being, University of Glasgow, Glasgow, UK
| | - O May
- Department of Cardiology, Gødstrup Hospital, Herning, Denmark
| | - J Mortensen
- Department of Nuclear Medicine, Gødstrup Hospital, Herning, Denmark
| | - C V Nielsen
- Department of Public Health, Section of Social Medicine and Rehabilitation, Aarhus University, Aarhus, Denmark
- DEFACTUM, Central Denmark Region, Aarhus, Denmark
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Newbold A, Warren FC, Taylor RS, Hulme C, Burnett S, Aas B, Botella C, Burkhardt F, Ehring T, Fontaine JRJ, Frost M, Garcia-Palacios A, Greimel E, Hoessle C, Hovasapian A, Huyghe VEI, Lochner J, Molinari G, Pekrun R, Platt B, Rosenkranz T, Scherer KR, Schlegel K, Schulte-Korne G, Suso C, Voigt V, Watkins ER. Promotion of mental health in young adults via mobile phone app: study protocol of the ECoWeB (emotional competence for well-being in Young adults) cohort multiple randomised trials. BMC Psychiatry 2020; 20:458. [PMID: 32962684 PMCID: PMC7510072 DOI: 10.1186/s12888-020-02857-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/03/2020] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Promoting well-being and preventing poor mental health in young people is a major global priority. Building emotional competence (EC) skills via a mobile app may be an effective, scalable and acceptable way to do this. However, few large-scale controlled trials have examined the efficacy of mobile apps in promoting mental health in young people; none have tailored the app to individual profiles. METHOD/DESIGN The Emotional Competence for Well-Being in Young Adults cohort multiple randomised controlled trial (cmRCT) involves a longitudinal prospective cohort to examine well-being, mental health and EC in 16-22 year olds across 12 months. Within the cohort, eligible participants are entered to either the PREVENT trial (if selected EC scores at baseline within worst-performing quartile) or to the PROMOTE trial (if selected EC scores not within worst-performing quartile). In both trials, participants are randomised (i) to continue with usual practice, repeated assessments and a self-monitoring app; (ii) to additionally receive generic cognitive-behavioural therapy self-help in app; (iii) to additionally receive personalised EC self-help in app. In total, 2142 participants aged 16 to 22 years, with no current or past history of major depression, bipolar disorder or psychosis will be recruited across UK, Germany, Spain, and Belgium. Assessments take place at baseline (pre-randomisation), 1, 3 and 12 months post-randomisation. Primary endpoint and outcome for PREVENT is level of depression symptoms on the Patient Health Questionnaire-9 at 3 months; primary endpoint and outcome for PROMOTE is emotional well-being assessed on the Warwick-Edinburgh Mental Wellbeing Scale at 3 months. Depressive symptoms, anxiety, well-being, health-related quality of life, functioning and cost-effectiveness are secondary outcomes. Compliance, adverse events and potentially mediating variables will be carefully monitored. CONCLUSIONS The trial aims to provide a better understanding of the causal role of learning EC skills using interventions delivered via mobile phone apps with respect to promoting well-being and preventing poor mental health in young people. This knowledge will be used to develop and disseminate innovative evidence-based, feasible, and effective Mobile-health public health strategies for preventing poor mental health and promoting well-being. TRIAL REGISTRATION ClinicalTrials.gov ( www.clinicaltrials.org ). Number of identification: NCT04148508 November 2019.
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Affiliation(s)
- A. Newbold
- grid.8391.30000 0004 1936 8024Mood Disorders Centre, School of Psychology, Sir Henry Wellcome Building for Mood Disorders Research, University of Exeter, Exeter, EX4 4LN UK
| | - F. C. Warren
- grid.8391.30000 0004 1936 8024College of Medicine and Health, University of Exeter, Exeter, UK
| | - R. S. Taylor
- grid.8391.30000 0004 1936 8024College of Medicine and Health, University of Exeter, Exeter, UK ,grid.8756.c0000 0001 2193 314XMRC/CSO Social and Public Health Sciences Unit & Robertson Centre for Biostatistics, Institute of Health and Well Being, University of Glasgow, Glasgow, UK
| | - C. Hulme
- grid.8391.30000 0004 1936 8024College of Medicine and Health, University of Exeter, Exeter, UK
| | - S. Burnett
- grid.8391.30000 0004 1936 8024Mood Disorders Centre, School of Psychology, Sir Henry Wellcome Building for Mood Disorders Research, University of Exeter, Exeter, EX4 4LN UK
| | - B. Aas
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU, Munich, Germany
| | - C. Botella
- grid.9612.c0000 0001 1957 9153Universitat Jaume I, Castelló de la Plana, Spain ,grid.413448.e0000 0000 9314 1427CIBER Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto Salud Carlos III, Madrid, Spain
| | | | - T. Ehring
- grid.5252.00000 0004 1936 973XDepartment of Psychology, LMU Munich, Munich, Germany
| | - J. R. J. Fontaine
- grid.5342.00000 0001 2069 7798Department of Work, Organization and Society, Ghent University, Ghent, Belgium
| | - M. Frost
- Monsenso ApS, Copenhagen, Denmark
| | - A. Garcia-Palacios
- grid.9612.c0000 0001 1957 9153Universitat Jaume I, Castelló de la Plana, Spain ,grid.413448.e0000 0000 9314 1427CIBER Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto Salud Carlos III, Madrid, Spain
| | - E. Greimel
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU, Munich, Germany
| | - C. Hoessle
- grid.5252.00000 0004 1936 973XDepartment of Psychology, LMU Munich, Munich, Germany
| | - A. Hovasapian
- grid.5342.00000 0001 2069 7798Department of Work, Organization and Society, Ghent University, Ghent, Belgium
| | - VEI Huyghe
- grid.5342.00000 0001 2069 7798Department of Work, Organization and Society, Ghent University, Ghent, Belgium
| | - J. Lochner
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU, Munich, Germany ,grid.5252.00000 0004 1936 973XDepartment of Psychology, LMU Munich, Munich, Germany
| | - G. Molinari
- grid.413448.e0000 0000 9314 1427CIBER Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto Salud Carlos III, Madrid, Spain
| | - R. Pekrun
- grid.411958.00000 0001 2194 1270Department of Psychology, University of Essex, UK, and Institute for Positive Psychology and Education, Australian Catholic University, Sydney, Australia
| | - B. Platt
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU, Munich, Germany
| | - T. Rosenkranz
- grid.5252.00000 0004 1936 973XDepartment of Psychology, LMU Munich, Munich, Germany
| | - K. R. Scherer
- grid.8591.50000 0001 2322 4988University of Geneva, Geneva, Switzerland
| | - K. Schlegel
- grid.5734.50000 0001 0726 5157University of Bern, Bern, Switzerland
| | - G. Schulte-Korne
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU, Munich, Germany
| | - C. Suso
- grid.9612.c0000 0001 1957 9153Universitat Jaume I, Castelló de la Plana, Spain
| | - V. Voigt
- Department of Child and Adolescent Psychiatry, Psychosomatics and Psychotherapy, University Hospital, LMU, Munich, Germany
| | - E. R. Watkins
- grid.8391.30000 0004 1936 8024Mood Disorders Centre, School of Psychology, Sir Henry Wellcome Building for Mood Disorders Research, University of Exeter, Exeter, EX4 4LN UK
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Lynggaard V, Zwisler AD, Taylor RS, May O, Nielsen CV. Effects of the patient education strategy 'Learning and Coping' in cardiac rehabilitation on readmissions and mortality: a randomized controlled trial (LC-REHAB). Health Educ Res 2020; 35:cyz034. [PMID: 31999315 DOI: 10.1093/her/cyz034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
We assessed the effects of the patient education strategy 'Learning and Coping' (LC) in cardiac rehabilitation (CR) on mortality and readmissions by exploring results from the LC-REHAB trial. In all, 825 patients with ischaemic heart disease or heart failure were randomized to the intervention arm (LC-CR) or the control arm (standard CR) at three hospitals in Denmark. LC-CR was situational and inductive, with experienced patients as co-educators supplemented with two individual interviews. Group-based training and education hours were the same in both arms. Outcomes were time to death or readmission, length of stay and absolute number of deaths or readmissions. No between-arm differences were found in time to death, first readmission, or length of stay. Within 30 days after completion of CR, the absolute number of all-cause readmissions was 117 in the LC arm and 146 in the control arm, adjusted odds ratio 78 (95% CI: 0.61-1.01), P = 0.06. This trend diminished over time. Adding LC strategies to standard CR showed a short term but no significant long-term effect on mortality or readmissions. However, the study was not powered to detect differences in mortality and morbidity. Thus, a risk of overseeing a true effect was present.
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Affiliation(s)
- V Lynggaard
- Cardiovascular Research Unit, Department of Cardiology, Regional Hospital West Jutland, 61 Gammel Landevej, 7400 Herning, Denmark
| | - A D Zwisler
- REHPA, The Danish Knowledge Centre for Rehabilitation and Palliative Care, University Hospital Odense and Institute of Clinical Medicine, University of Southern Denmark, 17 Vestergade, 5800 Nyborg, Denmark
| | - R S Taylor
- REHPA, The Danish Knowledge Centre for Rehabilitation and Palliative Care, University Hospital Odense and Institute of Clinical Medicine, University of Southern Denmark, 17 Vestergade, 5800 Nyborg, Denmark
- Institute of Health Research, University of Exeter Medical School, St. Luke's Campus, Heavitree Road, EX1 2LU Exeter, UK
| | - O May
- Department of Cardiology, Regional Hospital West Jutland, 61 Gammel Landevej, Herning 7400, Denmark
| | - C V Nielsen
- Department of Public Health, Section of Social Medicine and Rehabilitation, Aarhus University, 2 Bartholins Allé, 8000 Aarhus C, Denmark
- MarselisborgCentret, DEFACTUM, Central Denmark Region, 11 P.P. Ørums Gade, 8000 Aarhus C, Denmark
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Elia EG, Städler N, Ciani O, Taylor RS, Bujkiewicz S. Combining tumour response and progression free survival as surrogate endpoints for overall survival in advanced colorectal cancer. Cancer Epidemiol 2020; 64:101665. [PMID: 31911395 DOI: 10.1016/j.canep.2019.101665] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 11/22/2019] [Accepted: 12/17/2019] [Indexed: 01/09/2023]
Abstract
BACKGROUND Progression free survival (PFS) and tumour response (TR) have been investigated as surrogate endpoints for overall survival (OS) in advanced colorectal cancer (aCRC), however their validity has been shown to be suboptimal. In recent years, meta-analytic methods allowing for use of multiple surrogate endpoints jointly have been proposed. Our aim was to assess if PFS and TR used jointly as surrogate endpoints to OS improve their predictive value. METHODS Data were obtained from a systematic review of randomised controlled trials investigating effectiveness of pharmacological therapies in aCRC, including systemic chemotherapies, anti-epidermal growth factor receptor therapies and anti-angiogenic agents. Multivariate meta-analysis was used to model the association patterns between treatment effects on the surrogate endpoints (TR, PFS) and the final outcome (OS). RESULTS Analysis of 33 trials reporting treatment effects on all three outcomes showed reasonably strong association between treatment effects on PFS and OS, however the association parameters were obtained with a large uncertainty. A weak surrogate relationship was noted between the treatment effects on TR and OS. Modelling the two surrogate endpoints, TR and PFS, jointly as predictors of treatment effect on OS gave no marked improvement to surrogate association patterns. Modest improvement in the precision of the predicted treatment effects on the final outcome was noted in studies investigating anti-angiogenic therapy, however it was likely due to chance. CONCLUSION The joint use of two surrogate endpoints did not lead to marked improvement in the association between treatment effects on surrogate and final endpoints in advanced colorectal cancer.
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Affiliation(s)
- E G Elia
- Department of Biostatistics, Harvard University, 677 Huntington Ave., Boston, MA 02115, USA; Department of Health Sciences, University of Leicester, George Davies Centre, University Road, Leicester LE1 7RH, UK.
| | - N Städler
- F. Hoffmann-La Roche Ltd, Basel, Switzerland
| | - O Ciani
- Evidence Synthesis & Modelling for Health Improvement, Institute of Health Research, University of Exeter Medical School, University of Exeter, Exeter EX2 4SG, UK; CERGAS Bocconi University, via Rontgen 1, 20136 Milan, Italy
| | - R S Taylor
- Evidence Synthesis & Modelling for Health Improvement, Institute of Health Research, University of Exeter Medical School, University of Exeter, Exeter EX2 4SG, UK
| | - S Bujkiewicz
- Department of Health Sciences, University of Leicester, George Davies Centre, University Road, Leicester LE1 7RH, UK
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Ramachandran P, Dobie R, Wilson-Kanamori JR, Dora EF, Henderson BEP, Luu NT, Portman JR, Matchett KP, Brice M, Marwick JA, Taylor RS, Efremova M, Vento-Tormo R, Carragher NO, Kendall TJ, Fallowfield JA, Harrison EM, Mole DJ, Wigmore SJ, Newsome PN, Weston CJ, Iredale JP, Tacke F, Pollard JW, Ponting CP, Marioni JC, Teichmann SA, Henderson NC. Resolving the fibrotic niche of human liver cirrhosis at single-cell level. Nature 2019; 575:512-518. [PMID: 31597160 PMCID: PMC6876711 DOI: 10.1038/s41586-019-1631-3] [Citation(s) in RCA: 786] [Impact Index Per Article: 157.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 09/04/2019] [Indexed: 12/13/2022]
Abstract
Liver cirrhosis is a major cause of death worldwide and is characterized by extensive fibrosis. There are currently no effective antifibrotic therapies available. To obtain a better understanding of the cellular and molecular mechanisms involved in disease pathogenesis and enable the discovery of therapeutic targets, here we profile the transcriptomes of more than 100,000 single human cells, yielding molecular definitions for non-parenchymal cell types that are found in healthy and cirrhotic human liver. We identify a scar-associated TREM2+CD9+ subpopulation of macrophages, which expands in liver fibrosis, differentiates from circulating monocytes and is pro-fibrogenic. We also define ACKR1+ and PLVAP+ endothelial cells that expand in cirrhosis, are topographically restricted to the fibrotic niche and enhance the transmigration of leucocytes. Multi-lineage modelling of ligand and receptor interactions between the scar-associated macrophages, endothelial cells and PDGFRα+ collagen-producing mesenchymal cells reveals intra-scar activity of several pro-fibrogenic pathways including TNFRSF12A, PDGFR and NOTCH signalling. Our work dissects unanticipated aspects of the cellular and molecular basis of human organ fibrosis at a single-cell level, and provides a conceptual framework for the discovery of rational therapeutic targets in liver cirrhosis.
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Affiliation(s)
- P Ramachandran
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK.
| | - R Dobie
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - J R Wilson-Kanamori
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - E F Dora
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - B E P Henderson
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - N T Luu
- NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, UK
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | - J R Portman
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - K P Matchett
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - M Brice
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - J A Marwick
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
- Cancer Research UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine at the University of Edinburgh, Edinburgh, UK
| | - R S Taylor
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - M Efremova
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | - R Vento-Tormo
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | - N O Carragher
- Cancer Research UK Edinburgh Centre, MRC Institute of Genetics and Molecular Medicine at the University of Edinburgh, Edinburgh, UK
| | - T J Kendall
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
- Division of Pathology, University of Edinburgh, Edinburgh, UK
| | - J A Fallowfield
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
| | - E M Harrison
- Clinical Surgery, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - D J Mole
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
- Clinical Surgery, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - S J Wigmore
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK
- Clinical Surgery, University of Edinburgh, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - P N Newsome
- NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, UK
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | - C J Weston
- NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, UK
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK
| | - J P Iredale
- Office of the Vice Chancellor, Beacon House and National Institute for Health Research, Biomedical Research Centre, Bristol, UK
| | - F Tacke
- Department of Hepatology and Gastroenterology, Charité University Medical Center, Berlin, Germany
| | - J W Pollard
- MRC Centre for Reproductive Health, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, New York, NY, USA
| | - C P Ponting
- MRC Human Genetics Unit, MRC Institute of Genetics and Molecular Medicine at the University of Edinburgh, Edinburgh, UK
| | - J C Marioni
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Hinxton, Cambridge, UK
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - S A Teichmann
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Hinxton, Cambridge, UK
- Theory of Condensed Matter Group, The Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - N C Henderson
- University of Edinburgh Centre for Inflammation Research, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, UK.
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Kirkman LK, Giencke LM, Taylor RS, Boring LR, Staudhammer CL, Mitchell RJ. Productivity and species richness in longleaf pine woodlands: resource-disturbance influences across an edaphic gradient. Ecology 2018; 97:2259-2271. [PMID: 27859094 DOI: 10.1002/ecy.1456] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 03/04/2016] [Accepted: 04/11/2016] [Indexed: 11/07/2022]
Abstract
This study examines the complex feedback mechanisms that regulate a positive relationship between species richness and productivity in a longleaf pine-wiregrass woodland. Across a natural soil moisture gradient spanning wet-mesic to xeric conditions, two large scale manipulations over a 10-yr period were used to determine how limiting resources and fire regulate plant species diversity and productivity at multiple scales. A fully factorial experiment was used to examine productivity and species richness responses to N and water additions. A separate experiment examined standing crop and richness responses to N addition in the presence and absence of fire. Specifically, these manipulations addressed the following questions: (1) How do N and water addition influence annual aboveground net primary productivity of the midstory/overstory and ground cover? (2) How do species richness responses to resource manipulations vary with scale and among functional groups of ground cover species? (3) How does standing crop (including overstory, understory/midstory, and ground cover components) differ between frequently burned and fire excluded plots after a decade without fire? (4) What is the role of fire in regulating species richness responses to N addition? This long-term study across a soil moisture gradient provides empirical evidence that species richness and productivity in longleaf pine woodlands are strongly regulated by soil moisture. After a decade of treatment, there was an overall species richness decline with N addition, an increase in richness of some functional groups with irrigation, and a substantial decline in species richness with fire exclusion. Changes in species richness in response to treatments were scale-dependent, occurring primarily at small scales (≤10 m2 ). Further, with fire exclusion, standing crop of ground cover decreased with N addition and non-pine understory/midstory increased in wet-mesic sites. Non-pine understory/midstory standing crop increased in xeric sites with fire exclusion, but there was no influence of N addition. This study highlights the complexity of interactions among multiple limiting resources, frequent fire, and characteristics of dominant functional groups that link species richness and productivity.
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Affiliation(s)
- L K Kirkman
- Joseph W. Jones Ecological Research Center, Newton, Georgia, 39870, USA
| | - L M Giencke
- Joseph W. Jones Ecological Research Center, Newton, Georgia, 39870, USA
| | - R S Taylor
- Joseph W. Jones Ecological Research Center, Newton, Georgia, 39870, USA
| | - L R Boring
- Joseph W. Jones Ecological Research Center, Newton, Georgia, 39870, USA
| | - C L Staudhammer
- Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama, 35487, USA
| | - R J Mitchell
- Joseph W. Jones Ecological Research Center, Newton, Georgia, 39870, USA
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Narendran P, Jackson N, Daley A, Thompson D, Stokes K, Greenfield S, Charlton M, Curran M, Solomon TPJ, Nouwen A, Lee SI, Cooper AR, Mostazir M, Taylor RS, Kennedy A, Andrews RC. Exercise to preserve β-cell function in recent-onset Type 1 diabetes mellitus (EXTOD) - a randomized controlled pilot trial. Diabet Med 2017; 34:1521-1531. [PMID: 28905421 DOI: 10.1111/dme.13439] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/27/2017] [Indexed: 01/07/2023]
Abstract
AIM Residual β-cell function is present at the time of diagnosis with Type 1 diabetes. Preserving this β-cell function reduces complications. We hypothesized that exercise preserves β-cell function in Type 1 diabetes and undertook a pilot trial to address the key uncertainties in designing a definitive trial to test this hypothesis. METHODS A randomized controlled pilot trial in adults aged 16-60 years diagnosed with Type 1 diabetes within the previous 3 months was undertaken. Participants were assigned to control (usual care) or intervention (exercise consultation every month), in a 1 : 1 ratio for 12 months. The primary outcomes were recruitment rate, drop out, exercise adherence [weeks with ≥ 150 min of self-reported moderate to vigorous physical activity (MVPA)], and exercise uptake in the control group. The secondary outcomes were differences in insulin sensitivity and rate of loss of β-cell function between intervention and control at 6 and 12 months. RESULTS Of 507 individuals who were approached, 58 (28 control, 30 intervention) entered the study and 41 completed it. Participants were largely white European males, BMI 24.8 ± 3.8 kg/m2 , HbA1c 75 ± 25 mmol/mol (9 ± 2%). Mean level of objectively measured MVPA increased in the intervention group (mean 243 to 273 min/week) and 61% of intervention participants reached the target of ≥ 150 min/week of self-reported MVPA on at least 42 weeks of the year. Physical activity levels fell slightly in the control group (mean 277 to 235 min of MVPA/week). There was exploratory evidence that intervention group became more insulin sensitive and required less insulin. However, the rate of loss of β-cell function appeared similar between the groups, although the change in insulin sensitivity may have affected this. CONCLUSION We show that it is possible to recruit and randomize people with newly diagnosed Type 1 diabetes to a trial of an exercise intervention, and increase and maintain their exercise levels for 12 months. Future trials need to incorporate measures of greater adherence to exercise training targets, and include more appropriate measures of β-cell function. (Clinical Trials Registry No; ISRCTN91388505).
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Affiliation(s)
- P Narendran
- The Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, The Medical School, University of Birmingham, Birmingham, UK
- Department of Diabetes, The Queen Elizabeth Hospital, Birmingham, UK
| | - N Jackson
- Division of Medicine, University of Bristol, Bristol, UK
| | - A Daley
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - D Thompson
- School for Health, University of Bath, Bath, UK
| | - K Stokes
- School for Health, University of Bath, Bath, UK
| | - S Greenfield
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - M Charlton
- Department of Diabetes, The Queen Elizabeth Hospital, Birmingham, UK
| | - M Curran
- The Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, The Medical School, University of Birmingham, Birmingham, UK
| | - T P J Solomon
- The Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, The Medical School, University of Birmingham, Birmingham, UK
| | - A Nouwen
- Department of Psychology, School of Science and Technology, Middlesex University, London, UK
| | - S I Lee
- The Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, The Medical School, University of Birmingham, Birmingham, UK
| | - A R Cooper
- Centre for Exercise, Nutrition and Health Sciences, University of Bristol, Bristol, UK
- NIHR Bristol Biomedical Research Unit in Nutrition, Diet and Lifestyle, University Hospitals Bristol Education and Research Centre, Bristol, UK
| | - M Mostazir
- College of Life and Environmental Sciences (CLES), University of Exeter, Exeter, UK
| | - R S Taylor
- Institute of Health Research, University of Exeter, Exeter, UK
| | - A Kennedy
- The Institute of Metabolism and Systems Research, Centre for Endocrinology, Diabetes and Metabolism, The Medical School, University of Birmingham, Birmingham, UK
- Department of Diabetes, The Queen Elizabeth Hospital, Birmingham, UK
| | - R C Andrews
- University of Exeter, Medical School, University of Exeter, Exeter, UK
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12
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Lima PC, Taylor RS, Cook M. Pseudocyst formation in the marine parasitic amoeba Neoparamoeba perurans: a short-term survival strategy to abrupt salinity variation. J Fish Dis 2017; 40:1109-1113. [PMID: 28000922 DOI: 10.1111/jfd.12588] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 10/20/2016] [Accepted: 10/20/2016] [Indexed: 06/06/2023]
Affiliation(s)
- P C Lima
- Integrated Sustainable Aquaculture Production, CSIRO Agriculture and Food, Woorim, QLD, Australia
| | - R S Taylor
- Integrated Sustainable Aquaculture Production, CSIRO Agriculture and Food, Hobart, TAS, Australia
| | - M Cook
- Integrated Sustainable Aquaculture Production, CSIRO Agriculture and Food, St Lucia, QLD, Australia
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Thompson TP, Greaves CJ, Ayres R, Aveyard P, Warren FC, Byng R, Taylor RS, Campbell JL, Ussher M, Michie S, West R, Taylor AH. Factors associated with study attrition in a pilot randomised controlled trial to explore the role of exercise-assisted reduction to stop (EARS) smoking in disadvantaged groups. Trials 2016; 17:524. [PMID: 27788686 PMCID: PMC5084338 DOI: 10.1186/s13063-016-1641-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 10/06/2016] [Indexed: 12/23/2022] Open
Abstract
Background Study attrition has the potential to compromise a trial’s internal and external validity. The aim of the present study was to identify factors associated with participant attrition in a pilot trial of the effectiveness of a novel behavioural support intervention focused on increasing physical activity to reduce smoking, to inform the methods to reduce attrition in a definitive trial. Methods Disadvantaged smokers who wanted to reduce but not quit were randomised (N = 99), of whom 61 (62 %) completed follow-up assessments at 16 weeks. Univariable logistic regression was conducted to determine the effects of intervention arm, method of recruitment, and participant characteristics (sociodemographic factors, and lifestyle, behavioural and attitudinal characteristics) on attrition, followed by multivariable logistic regression on those factors found to be related to attrition. Results Participants with low confidence to quit, and who were undertaking less than 150 mins of moderate and vigorous physical activity per week at baseline were less likely to complete the 16-week follow-up assessment. Exploratory analysis revealed that those who were lost to follow-up early in the trial (i.e., by 4 weeks), compared with those completing the study, were younger, had smoked for fewer years and had lower confidence to quit in the next 6 months. Participants who recorded a higher expired air carbon monoxide reading at baseline were more likely to drop out late in the study, as were those recruited via follow-up telephone calls. Multivariable analyses showed that only completing less than 150 mins of physical activity retained any confidence in predicting attrition in the presence of other variables. Conclusions The findings indicate that those who take more effort to be recruited, are younger, are heavier smokers, have less confidence to quit, and are less physically active are more likely to withdraw or be lost to follow-up.
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Affiliation(s)
- T P Thompson
- Plymouth University Peninsula School of Medicine and Dentistry, Plymouth, UK.
| | - C J Greaves
- University of Exeter Medical School, Exeter, UK
| | - R Ayres
- Plymouth University Peninsula School of Medicine and Dentistry, Plymouth, UK
| | - P Aveyard
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | - F C Warren
- University of Exeter Medical School, Exeter, UK
| | - R Byng
- Plymouth University Peninsula School of Medicine and Dentistry, Plymouth, UK
| | - R S Taylor
- University of Exeter Medical School, Exeter, UK
| | | | - M Ussher
- Institute of Population Health Research, St George's University of London, Cranmer Terrace, London, UK
| | - S Michie
- Research Department of Clinical, Educational and Health Psychology, University College London, 1-19 Torrington Place, London, UK
| | - R West
- Health Behaviour Research Centre, Department of Epidemiology and Public Health, University College London, Gower Street, London, UK
| | - A H Taylor
- Plymouth University Peninsula School of Medicine and Dentistry, Plymouth, UK
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Eyre V, Lang CC, Smith K, Jolly K, Davis R, Hayward C, Wingham J, Abraham C, Green C, Warren FC, Britten N, Greaves CJ, Doherty P, Austin J, Van Lingen R, Singh S, Buckingham S, Paul K, Taylor RS, Dalal HM. Rehabilitation Enablement in Chronic Heart Failure-a facilitated self-care rehabilitation intervention in patients with heart failure with preserved ejection fraction (REACH-HFpEF) and their caregivers: rationale and protocol for a single-centre pilot randomised controlled trial. BMJ Open 2016; 6:e012853. [PMID: 27798024 PMCID: PMC5093626 DOI: 10.1136/bmjopen-2016-012853] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
INTRODUCTION The Rehabilitation EnAblement in CHronic Heart Failure in patients with Heart Failure (HF) with preserved ejection fraction (REACH-HFpEF) pilot trial is part of a research programme designed to develop and evaluate a facilitated, home-based, self-help rehabilitation intervention to improve self-care and quality of life (QoL) in heart failure patients and their caregivers. We will assess the feasibility of a definitive trial of the REACH-HF intervention in patients with HFpEF and their caregivers. The impact of the REACH-HF intervention on echocardiographic outcomes and bloodborne biomarkers will also be assessed. METHODS AND ANALYSIS A single-centre parallel two-group randomised controlled trial (RCT) with 1:1 individual allocation to the REACH-HF intervention plus usual care (intervention) or usual care alone (control) in 50 HFpEF patients and their caregivers. The REACH-HF intervention comprises a REACH-HF manual with supplementary tools, delivered by trained facilitators over 12 weeks. A mixed methods approach will be used to assess estimation of recruitment and retention rates; fidelity of REACH-HF manual delivery; identification of barriers to participation and adherence to the intervention and study protocol; feasibility of data collection and outcome burden. We will assess the variance in study outcomes to inform a definitive study sample size and assess methods for the collection of resource use and intervention delivery cost data to develop the cost-effectiveness analyses framework for any future trial. Patient outcomes collected at baseline, 4 and 6 months include QoL, psychological well-being, exercise capacity, physical activity and HF-related hospitalisation. Caregiver outcomes will also be assessed, and a substudy will evaluate impact of the REACH-HF manual on resting global cardiovascular function and bloodborne biomarkers in HFpEF patients. ETHICS AND DISSEMINATION The study is approved by the East of Scotland Research Ethics Service (Ref: 15/ES/0036). Findings will be disseminated via journals and presentations to clinicians, commissioners and service users. TRIAL REGISTRATION NUMBER ISRCTN78539530; Pre-results .
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Affiliation(s)
- V Eyre
- Peninsula Clinical Trials Unit, Plymouth University, Plymouth, UK
| | - C C Lang
- School of Medicine, University of Dundee, Ninewells Hospital and Medical School, Dundee, UK
| | - K Smith
- School of Medicine, University of Dundee, Ninewells Hospital and Medical School, Dundee, UK
- School of Nursing & Midwifery, Dundee University, Dundee, UK
| | - K Jolly
- Institute for Applied Health Research, University of Birmingham, Birmingham, UK
| | - R Davis
- Cardiology Department, Sandwell & West Birmingham Hospitals NHS Trust, Birmingham, UK
| | - C Hayward
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - J Wingham
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
- Research, Development & Innovation, Royal Cornwall Hospitals NHS Trust, Truro, UK
| | - C Abraham
- Psychology Applied to Health Group, University of Exeter Medical School, Exeter, UK
| | - C Green
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - F C Warren
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - N Britten
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - C J Greaves
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - P Doherty
- Department of Health Sciences, University of York, York, UK
| | - J Austin
- Heart Failure Services and Cardiac Rehabilitation, Aneurin Bevan University Health Board, Nevill Hall Hospital, Abergavenny, UK
| | - R Van Lingen
- Cardiology Department, Royal Cornwall Hospitals NHS Trust, Truro, UK
| | - S Singh
- Centre for Exercise and Rehabilitation Science, University Hospitals of Leicester NHS Trust, Glenfield Hospital, Leicester, UK
| | - S Buckingham
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - K Paul
- REACH-HF Patient and Public Involvement Group, c/o Research, Development & Innovation, Royal Cornwall Hospitals NHS Trust, Truro, UK
| | - R S Taylor
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - H M Dalal
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
- Research, Development & Innovation, Royal Cornwall Hospitals NHS Trust, Truro, UK
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15
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Buckingham SA, Taylor RS, Jolly K, Zawada A, Dean SG, Cowie A, Norton RJ, Dalal HM. Home-based versus centre-based cardiac rehabilitation: abridged Cochrane systematic review and meta-analysis. Open Heart 2016; 3:e000463. [PMID: 27738516 PMCID: PMC5030549 DOI: 10.1136/openhrt-2016-000463] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 06/24/2016] [Accepted: 07/19/2016] [Indexed: 12/29/2022] Open
Abstract
Objective To update the Cochrane review comparing the effects of home-based and supervised centre-based cardiac rehabilitation (CR) on mortality and morbidity, quality of life, and modifiable cardiac risk factors in patients with heart disease. Methods Systematic review and meta-analysis. The Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, PsycINFO and CINAHL were searched up to October 2014, without language restriction. Randomised trials comparing home-based and centre-based CR programmes in adults with myocardial infarction, angina, heart failure or who had undergone coronary revascularisation were included. Results 17 studies with 2172 patients were included. No difference was seen between home-based and centre-based CR in terms of: mortality (relative risk (RR) 0.79, 95% CI 0.43 to 1.47); cardiac events; exercise capacity (mean difference (MD) −0.10, −0.29 to 0.08); total cholesterol (MD 0.07 mmol/L, −0.24 to 0.11); low-density lipoprotein cholesterol (MD −0.06 mmol/L, −0.27 to 0.15); triglycerides (MD −0.16 mmol/L, −0.38 to 0.07); systolic blood pressure (MD 0.2 mm Hg, −3.4 to 3.8); smoking (RR 0.98, 0.79 to 1.21); health-related quality of life and healthcare costs. Lower high-density lipoprotein cholesterol (MD −0.07 mmol/L, −0.11 to −0.03, p=0.001) and lower diastolic blood pressure (MD −1.9 mm Hg, −0.8 to −3.0, p=0.009) were observed in centre-based participants. Home-based CR was associated with slightly higher adherence (RR 1.04, 95% CI 1.01 to 1.07). Conclusions Home-based and centre-based CR provide similar benefits in terms of clinical and health-related quality of life outcomes at equivalent cost for those with heart failure and following myocardial infarction and revascularisation.
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Affiliation(s)
- S A Buckingham
- Department of Research, Development & Innovation , Royal Cornwall, Hospitals NHS Trust , Truro , UK
| | - R S Taylor
- Institute of Health Research (Primary Care), University of Exeter Medical School , Exeter, Devon , UK
| | - K Jolly
- Institute for Applied Health Research, University of Birmingham , Birmingham , UK
| | - A Zawada
- Agency for Health Technology Assessment and Tariff System , Warsaw , Poland
| | - S G Dean
- Institute of Health Research (Primary Care), University of Exeter Medical School , Exeter, Devon , UK
| | - A Cowie
- Cardiac Rehabilitation , University Hospital Ayr , Ayr , UK
| | - R J Norton
- Institute of Bioengineering, School of Engineering and Materials Science, Queen Mary University of London , London , UK
| | - H M Dalal
- Department of Research, Development & Innovation, Royal Cornwall, Hospitals NHS Trust, Truro, UK; Institute of Health Research (Primary Care), University of Exeter Medical School, Exeter, Devon, UK
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Lima PC, Taylor RS, Cook M. Involvement of contractile vacuoles in the osmoregulation process of the marine parasitic amoeba Neoparamoeba perurans. J Fish Dis 2016; 39:629-633. [PMID: 26332530 DOI: 10.1111/jfd.12408] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/30/2015] [Accepted: 07/02/2015] [Indexed: 06/05/2023]
Affiliation(s)
- P C Lima
- CSIRO Agriculture Flagship, Integrated Sustainable Aquaculture Production Program, BIRC, Woorim, Qld, Australia
| | - R S Taylor
- CSIRO Agriculture Flagship, Integrated Sustainable Aquaculture Production Program, Battery Point, TAS, Australia
| | - M Cook
- CSIRO Agriculture Flagship, Integrated Sustainable Aquaculture Production Program, ESP, Dutton Park, Qld, Australia
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Lund K, Sibilitz KL, Berg SK, Thygesen LC, Taylor RS, Zwisler AD. Physical activity increases survival after heart valve surgery. Heart 2016; 102:1388-95. [DOI: 10.1136/heartjnl-2015-308827] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Accepted: 03/16/2016] [Indexed: 11/04/2022] Open
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Taylor RS, Hayward C, Eyre V, Austin J, Davies R, Doherty P, Jolly K, Wingham J, Van Lingen R, Abraham C, Green C, Warren FC, Britten N, Greaves CJ, Singh S, Buckingham S, Paul K, Dalal H. Clinical effectiveness and cost-effectiveness of the Rehabilitation Enablement in Chronic Heart Failure (REACH-HF) facilitated self-care rehabilitation intervention in heart failure patients and caregivers: rationale and protocol for a multicentre randomised controlled trial. BMJ Open 2015; 5:e009994. [PMID: 26700291 PMCID: PMC4691763 DOI: 10.1136/bmjopen-2015-009994] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 09/30/2015] [Accepted: 10/05/2015] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION The Rehabilitation EnAblement in CHronic Heart Failure (REACH-HF) trial is part of a research programme designed to develop and evaluate a health professional facilitated, home-based, self-help rehabilitation intervention to improve self-care and health-related quality of life in people with heart failure and their caregivers. The trial will assess the clinical effectiveness and cost-effectiveness of the REACH-HF intervention in patients with systolic heart failure and impact on the outcomes of their caregivers. METHODS AND ANALYSIS A parallel two group randomised controlled trial with 1:1 individual allocation to the REACH-HF intervention plus usual care (intervention group) or usual care alone (control group) in 216 patients with systolic heart failure (ejection fraction <45%) and their caregivers. The intervention comprises a self-help manual delivered by specially trained facilitators over a 12-week period. The primary outcome measure is patients' disease-specific health-related quality of life measured using the Minnesota Living with Heart Failure questionnaire at 12 months' follow-up. Secondary outcomes include survival and heart failure related hospitalisation, blood biomarkers, psychological well-being, exercise capacity, physical activity, other measures of quality of life, patient safety and the quality of life, psychological well-being and perceived burden of caregivers at 4, 6 and 12 months' follow-up. A process evaluation will assess fidelity of intervention delivery and explore potential mediators and moderators of changes in health-related quality of life in intervention and control group patients. Qualitative studies will describe patient and caregiver experiences of the intervention. An economic evaluation will estimate the cost-effectiveness of the REACH-HF intervention plus usual care versus usual care alone in patients with systolic heart failure. ETHICS AND DISSEMINATION The study is approved by the North West-Lancaster Research Ethics Committee (ref 14/NW/1351). Findings will be disseminated via journals and presentations to publicise the research to clinicians, commissioners and service users. TRIAL REGISTRATION NUMBER ISRCTN86234930; Pre-results.
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Affiliation(s)
- R S Taylor
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - C Hayward
- Peninsula Clinical Trials Unit, Plymouth University, Plymouth, Devon, UK
| | - V Eyre
- Peninsula Clinical Trials Unit, Plymouth University, Plymouth, Devon, UK
| | - J Austin
- Heart Failure Services and Cardiac Rehabilitation, Aneurin Bevan University Health Board, Nevill Hall Hospital, Abergavenny, UK
| | - R Davies
- Cardiology Department, Sandwell & West Birmingham Hospitals NHS Trust, Birmingham, UK
| | - P Doherty
- Department of Health Sciences, University of York, York, UK
| | - K Jolly
- Institute for Applied Health Research, University of Birmingham, Birmingham, UK
| | - J Wingham
- Institute of Health Research, University of Exeter Medical School, Exeter, UK Department of Research, Development & Innovation, Royal Cornwall Hospitals NHS Trust, Truro, UK
| | - R Van Lingen
- Cardiology Department, Royal Cornwall Hospitals NHS Trust, Truro, UK
| | - C Abraham
- Psychology Applied to Health Group, University of Exeter Medical School, Exeter, UK
| | - C Green
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - F C Warren
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - N Britten
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - C J Greaves
- Institute of Health Research, University of Exeter Medical School, Exeter, UK
| | - S Singh
- Centre for Exercise and Rehabilitation Science, University Hospitals of Leicester NHS Trust, Glenfield Hospital, Leicester, UK
| | - S Buckingham
- Department of Research, Development & Innovation, Royal Cornwall Hospitals NHS Trust, Truro, UK
| | - K Paul
- REACH-HF Patient and Public Involvement Group, c/o Research, Development & Innovation, Royal Cornwall Hospitals NHS Trust, Truro, UK
| | - H Dalal
- Institute of Health Research, University of Exeter Medical School, Exeter, UK Department of Research, Development & Innovation, Royal Cornwall Hospitals NHS Trust, Truro, UK
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Espiner EA, Prickett TCR, Taylor RS, Reid RA, McCowan LM. Effects of pre-eclampsia and fetal growth restriction on C-type natriuretic peptide. BJOG 2015; 122:1236-43. [DOI: 10.1111/1471-0528.13397] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/08/2015] [Indexed: 11/30/2022]
Affiliation(s)
- EA Espiner
- Department of Medicine; University of Otago; Christchurch New Zealand
| | - TCR Prickett
- Department of Medicine; University of Otago; Christchurch New Zealand
| | - RS Taylor
- Department of Obstetrics and Gynaecology; Faculty of Medical and Health Sciences; University of Auckland; Auckland New Zealand
| | - RA Reid
- Department of Obstetrics and Gynaecology; University of Otago; Christchurch New Zealand
| | - LM McCowan
- Department of Obstetrics and Gynaecology; Faculty of Medical and Health Sciences; University of Auckland; Auckland New Zealand
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Rigoard P, Desai MJ, Taylor RS. Failed back surgery syndrome: what's in a name? A proposal to replace "FBSS" by "POPS"…. Neurochirurgie 2015; 61 Suppl 1:S16-21. [PMID: 25665773 DOI: 10.1016/j.neuchi.2014.12.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 12/05/2014] [Accepted: 12/31/2014] [Indexed: 01/15/2023]
Abstract
BACKGROUND The current definition of Failed Back Surgery Syndrome (FBSS) has a pejorative and restrictive connotation of blame and failure. Optimally, the evaluation of FBSS patients might be based on a multidimensional approach, involving an array of practitioners including spine surgeons, pain physicians, physiotherapists and behavioural specialists. Even though these clinical interactions should lead to a unique approach, one main problem comes from the fact that FBSS definition has varied over time and remains extremely controversial. There is now a need for global consensus about what we call FBSS, why, when and how. Discussing the name of this syndrome appears to be a logical starting point. DISCUSSION "PostOperative Persistent Syndrome", summarised by the acronym "POPS", could be an appropriate term to not only encapsulate failure but pain, function and psychosocial dysfunction following unsuccessful spine surgery whether from a technical or expectation standpoint. A return to the source might help to identify the real clinical problem, i.e. the pain mechanism: nociceptive, neuropathic pain or mixed. A clinical and radiological spine assessment is key to ensure that no further surgery is required, by distinguishing within the so-called FBSS population, "true" FBSS patients and "potential" FBSS patients, who are actually not FBSS patients, as an aetiological treatment of potential pain generators still remains possible. CONCLUSION We propose to replace the FBSS acronym by POPS. The ultimate goal of this redefinition would be to guide the patient towards the future rather than the past and to reach a consensus, based on network discussions, concerning the following items: integrate pain mechanisms into the diagnostic process; implement the notion of a predominant ratio between mechanical/neuropathic pain mechanisms, which defines the potential target for treatment options; create a network supported by a database, to prospectively pool and analyse data, using homogeneous evaluation tools and ultimately define outcome predictors in this population.
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Affiliation(s)
- P Rigoard
- Department of neurosurgery, Poitiers university hospital, 86000 Poitiers, France; N(3)Lab (neuromodulation & neural networks), Poitiers university hospital, 86000 Poitiers, France; Inserm CIC 802 Poitiers university hospital, 86000 Poitiers, France.
| | - M J Desai
- International spine, pain & performance center, Washington DC, USA
| | - R S Taylor
- Institute of health research, university of Exeter medical school, Exeter, UK
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O'Mahen HA, Richards DA, Woodford J, Wilkinson E, McGinley J, Taylor RS, Warren FC. Netmums: a phase II randomized controlled trial of a guided Internet behavioural activation treatment for postpartum depression. Psychol Med 2014; 44:1675-1689. [PMID: 24148703 PMCID: PMC4005035 DOI: 10.1017/s0033291713002092] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 07/09/2013] [Accepted: 07/21/2013] [Indexed: 12/30/2022]
Abstract
BACKGROUND Despite the high prevalence of postnatal depression (PND), few women seek help. Internet interventions may overcome many of the barriers to PND treatment use. We report a phase II evaluation of a 12-session, modular, guided Internet behavioural activation (BA) treatment modified to address postnatal-specific concerns [Netmums Helping With Depression (NetmumsHWD)]. METHOD To assess feasibility, we measured recruitment and attrition to the trial and examined telephone session support and treatment adherence. We investigated sociodemographic and psychological predictors of treatment adherence. Effectiveness outcomes were estimated with the Edinburgh Postnatal Depression Scale (EPDS), Generalized Anxiety Disorder-7, Work and Social Adjustment Scale, Postnatal Bonding Questionnaire, and Social Provisions Scale. RESULTS A total of 249 women were recruited via a UK parenting site, Netmums.com. A total of 83 women meeting DSM-IV criteria for major depressive disorder were randomized to NetmumsHWD (n = 41) or treatment-as-usual (TAU; n = 42). Of the 83 women, 71 (86%) completed the EPDS at post-treatment, and 71% (59/83) at the 6-month follow-up. Women completed an average of eight out of 12 telephone support sessions and five out of 12 modules. Working women and those with less support completed fewer modules. There was a large effect size favouring women who received NetmumsHWD on depression, work and social impairment, and anxiety scores at post-treatment compared with women in the TAU group, and a large effect size on depression at 6 months post-treatment. There were small effect sizes for postnatal bonding and perceived social support. CONCLUSIONS A supported, modular, Internet BA programme can be feasibly delivered to postpartum women, offering promise to improve depression, anxiety and functioning.
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Affiliation(s)
- H. A. O'Mahen
- Mood Disorders Centre, University of Exeter, Washington Singer Building, Exeter, UK
| | - D. A. Richards
- University of Exeter Medical School, Washington Singer Building, Exeter, UK
| | - J. Woodford
- Mood Disorders Centre, University of Exeter, Washington Singer Building, Exeter, UK
| | - E. Wilkinson
- Academic Unit of Child and Adolescent Psychiatry, Imperial College, St Mary's Campus, Norfolk Place, LondonUK
| | - J. McGinley
- Netmums.com, Marylebone Business Centre, London, UK
| | - R. S. Taylor
- University of Exeter Medical School, Veysey Building, Exeter, UK
| | - F. C. Warren
- University of Exeter Medical School, Veysey Building, Exeter, UK
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Zarkasi KZ, Abell GCJ, Taylor RS, Neuman C, Hatje E, Tamplin ML, Katouli M, Bowman JP. Pyrosequencing-based characterization of gastrointestinal bacteria of Atlantic salmon (Salmo salar L.) within a commercial mariculture system. J Appl Microbiol 2014; 117:18-27. [PMID: 24698479 DOI: 10.1111/jam.12514] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Revised: 03/19/2014] [Accepted: 03/28/2014] [Indexed: 11/30/2022]
Abstract
AIMS The relationship of Atlantic salmon gastrointestinal (GI) tract bacteria to environmental factors, in particular water temperature within a commercial mariculture system, was investigated. METHODS AND RESULTS Salmon GI tract bacterial communities commercially farmed in south-eastern Tasmania were analysed, over a 13-month period across a standard commercial production farm cycle, using 454 16S rRNA-based pyrosequencing. Faecal bacterial communities were highly dynamic but largely similar between randomly selected fish. In postsmolt, the faecal bacteria population was dominated by Gram-positive fermentative bacteria; however, by midsummer, members of the family Vibrionaceae predominated. As fish progressed towards harvest, a range of different bacterial genera became more prominent corresponding to a decline in Vibrionaceae. The sampled fish were fed two different commercial diet series with slightly different protein, lipid and digestible energy level; however, the effect of these differences was minimal. CONCLUSIONS The overall data demonstrated dynamic hind gut communities in salmon that were related to season and fish growth phases but were less influenced by differences in commercial diets used routinely within the farm system studied. SIGNIFICANCE AND IMPACT OF THE STUDY This study provides understanding of farmed salmon GI bacterial communities and describes the relative impact of diet, environmental and farm factors.
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Affiliation(s)
- K Z Zarkasi
- Tasmanian Institute of Agriculture, Food Safety Centre, University of Tasmania, Hobart, Tas., Australia; School of Biological Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Pavey TG, Taylor AH, Fox KR, Hillsdon M, Anokye N, Campbell JL, Foster C, Green C, Moxham T, Mutrie N, Searle J, Trueman P, Taylor RS. Republished research: Effect of exercise referral schemes in primary care on physical activity and improving health outcomes: systematic review and meta-analysis. Br J Sports Med 2013; 47:526. [PMID: 23620507 DOI: 10.1136/bjsports-2012-e6462rep] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- T G Pavey
- Peninsula College of Medicine and Dentistry, Universities of Exeter and Plymouth, Exeter EX2 4SG, UK.
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Nimmo DG, Kelly LT, Spence-Bailey LM, Watson SJ, Taylor RS, Clarke MF, Bennett AF. Fire mosaics and reptile conservation in a fire-prone region. Conserv Biol 2013; 27:345-353. [PMID: 23163245 DOI: 10.1111/j.1523-1739.2012.01958.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 07/06/2012] [Indexed: 06/01/2023]
Abstract
Fire influences the distribution of fauna in terrestrial biomes throughout the world. Use of fire to achieve a mosaic of vegetation in different stages of succession after burning (i.e., patch-mosaic burning) is a dominant conservation practice in many regions. Despite this, knowledge of how the spatial attributes of vegetation mosaics created by fire affect fauna is extremely scarce, and it is unclear what kind of mosaic land managers should aim to achieve. We selected 28 landscapes (each 12.6 km(2) ) that varied in the spatial extent and diversity of vegetation succession after fire in a 104,000 km(2) area in the semiarid region of southeastern Australia. We surveyed for reptiles at 280 sites nested within the 28 landscapes. The landscape-level occurrence of 9 of the 22 species modeled was associated with the spatial extent of vegetation age classes created by fire. Biogeographic context and the extent of a vegetation type influenced 7 and 4 species, respectively. No species were associated with the diversity of vegetation ages within a landscape. Negative relations between reptile occurrence and both extent of recently burned vegetation (≤10 years postfire, n = 6) and long unburned vegetation (>35 years postfire, n = 4) suggested that a coarse-grained mosaic of areas (e.g. >1000 ha) of midsuccessional vegetation (11-35 years postfire) may support the fire-sensitive reptile species we modeled. This age class coincides with a peak in spinifex cover, a keystone structure for reptiles in semiarid and arid Australia. Maintaining over the long term a coarse-grained mosaic of large areas of midsuccessional vegetation in mallee ecosystems will need to be balanced against the short-term negative effects of large fires on many reptile species and a documented preference by species from other taxonomic groups, particularly birds, for older vegetation.
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Affiliation(s)
- D G Nimmo
- Landscape Ecology Research Group, School of Life and Environmental Sciences, Deakin University, Burwood, Victoria, 3125, Australia
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Ciani O, Taylor RS. Surrogate, friend or foe? The need for case studies of the use of surrogate outcomes in cost-effectiveness analyses. Health Econ 2013; 22:251-252. [PMID: 22623328 DOI: 10.1002/hec.2826] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 02/21/2012] [Accepted: 04/02/2012] [Indexed: 06/01/2023]
Abstract
We comment on a recent article by Hawkins et al. presenting different analytic approaches for the inclusion of surrogate and final outcomes in cost-effectiveness analyses. This methodological case study provides a timely and valuable contribution to build on the debate about the use of evidence based on surrogate outcomes in health technology assessment.
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Watkins ER, Taylor RS, Byng R, Baeyens C, Read R, Pearson K, Watson L. Guided self-help concreteness training as an intervention for major depression in primary care: a Phase II randomized controlled trial. Psychol Med 2012; 42:1359-1371. [PMID: 22085757 PMCID: PMC3359637 DOI: 10.1017/s0033291711002480] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 09/29/2011] [Accepted: 09/30/2011] [Indexed: 11/06/2022]
Abstract
BACKGROUND The development of widely accessible, effective psychological interventions for depression is a priority. This randomized trial provides the first controlled data on an innovative cognitive bias modification (CBM) training guided self-help intervention for depression. METHOD One hundred and twenty-one consecutively recruited participants meeting criteria for current major depression were randomly allocated to treatment as usual (TAU) or to TAU plus concreteness training (CNT) guided self-help or to TAU plus relaxation training (RT) guided self-help. CNT involved repeated practice at mental exercises designed to switch patients from an unhelpful abstract thinking habit to a helpful concrete thinking habit, thereby targeting depressogenic cognitive processes (rumination, overgeneralization). RESULTS The addition of CNT to TAU significantly improved depressive symptoms at post-treatment [mean difference on the Hamilton Rating Scale for Depression (HAMD) 4.28, 95% confidence interval (CI) 1.29-7.26], 3- and 6-month follow-ups, and for rumination and overgeneralization post-treatment. There was no difference in the reduction of symptoms between CNT and RT (mean difference on the HAMD 1.98, 95% CI -1.14 to 5.11), although CNT significantly reduced rumination and overgeneralization relative to RT post-treatment, suggesting a specific benefit on these cognitive processes. CONCLUSIONS This study provides preliminary evidence that CNT guided self-help may be a useful addition to TAU in treating major depression in primary care, although the effect was not significantly different from an existing active treatment (RT) matched for structural and common factors. Because of its relative brevity and distinct format, it may have value as an additional innovative approach to increase the accessibility of treatment choices for depression.
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Affiliation(s)
- E R Watkins
- Mood Disorders Centre, University of Exeter, UK.
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Taylor RS, Baker M, Solimano A. Palivizumab Prophylaxis for 29–32 Week Gestation Infants Selected by Risk Factors: Results from Victoria, British Columbia. Paediatr Child Health 2012. [DOI: 10.1093/pch/17.suppl_a.27ab] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Pavey TG, Anokye N, Taylor AH, Trueman P, Moxham T, Fox KR, Hillsdon M, Green C, Campbell JL, Foster C, Mutrie N, Searle J, Taylor RS. The clinical effectiveness and cost-effectiveness of exercise referral schemes: a systematic review and economic evaluation. Health Technol Assess 2012; 15:i-xii, 1-254. [PMID: 22182828 DOI: 10.3310/hta15440] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Exercise referral schemes (ERS) aim to identify inactive adults in the primary-care setting. The GP or health-care professional then refers the patient to a third-party service, with this service taking responsibility for prescribing and monitoring an exercise programme tailored to the needs of the individual. OBJECTIVE To assess the clinical effectiveness and cost-effectiveness of ERS for people with a diagnosed medical condition known to benefit from physical activity (PA). The scope of this report was broadened to consider individuals without a diagnosed condition who are sedentary. DATA SOURCES MEDLINE; EMBASE; PsycINFO; The Cochrane Library, ISI Web of Science; SPORTDiscus and ongoing trial registries were searched (from 1990 to October 2009) and included study references were checked. METHODS Systematic reviews: the effectiveness of ERS, predictors of ERS uptake and adherence, and the cost-effectiveness of ERS; and the development of a decision-analytic economic model to assess cost-effectiveness of ERS. RESULTS Seven randomised controlled trials (UK, n = 5; non-UK, n = 2) met the effectiveness inclusion criteria, five comparing ERS with usual care, two compared ERS with an alternative PA intervention, and one to an ERS plus a self-determination theory (SDT) intervention. In intention-to-treat analysis, compared with usual care, there was weak evidence of an increase in the number of ERS participants who achieved a self-reported 90-150 minutes of at least moderate-intensity PA per week at 6-12 months' follow-up [pooled relative risk (RR) 1.11, 95% confidence interval 0.99 to 1.25]. There was no consistent evidence of a difference between ERS and usual care in the duration of moderate/vigorous intensity and total PA or other outcomes, for example physical fitness, serum lipids, health-related quality of life (HRQoL). There was no between-group difference in outcomes between ERS and alternative PA interventions or ERS plus a SDT intervention. None of the included trials separately reported outcomes in individuals with medical diagnoses. Fourteen observational studies and five randomised controlled trials provided a numerical assessment of ERS uptake and adherence (UK, n = 16; non-UK, n = 3). Women and older people were more likely to take up ERS but women, when compared with men, were less likely to adhere. The four previous economic evaluations identified suggest ERS to be a cost-effective intervention. Indicative incremental cost per quality-adjusted life-year (QALY) estimates for ERS for various scenarios were based on a de novo model-based economic evaluation. Compared with usual care, the mean incremental cost for ERS was £169 and the mean incremental QALY was 0.008, with the base-case incremental cost-effectiveness ratio at £20,876 per QALY in sedentary people without a medical condition and a cost per QALY of £14,618 in sedentary obese individuals, £12,834 in sedentary hypertensive patients, and £8414 for sedentary individuals with depression. Estimates of cost-effectiveness were highly sensitive to plausible variations in the RR for change in PA and cost of ERS. LIMITATIONS We found very limited evidence of the effectiveness of ERS. The estimates of the cost-effectiveness of ERS are based on a simple analytical framework. The economic evaluation reports small differences in costs and effects, and findings highlight the wide range of uncertainty associated with the estimates of effectiveness and the impact of effectiveness on HRQoL. No data were identified as part of the effectiveness review to allow for adjustment of the effect of ERS in different populations. CONCLUSIONS There remains considerable uncertainty as to the effectiveness of ERS for increasing activity, fitness or health indicators or whether they are an efficient use of resources in sedentary people without a medical diagnosis. We failed to identify any trial-based evidence of the effectiveness of ERS in those with a medical diagnosis. Future work should include randomised controlled trials assessing the cinical effectiveness and cost-effectivenesss of ERS in disease groups that may benefit from PA. FUNDING The National Institute for Health Research Health Technology Assessment programme.
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Affiliation(s)
- T G Pavey
- Peninsula College of Medicine and Dentistry, University of Exeter, Exeter, UK
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Watson SJ, Taylor RS, Nimmo DG, Kelly LT, Clarke MF, Bennett AF. The influence of unburnt patches and distance from refuges on post-fire bird communities. Anim Conserv 2012. [DOI: 10.1111/j.1469-1795.2012.00542.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - R. S. Taylor
- Department of Zoology; La Trobe University; Melbourne; Vic; Australia
| | - D. G. Nimmo
- Landscape Ecology Research Group, School of Life and Environmental Sciences; Deakin University; Burwood; Vic; Australia
| | | | - M. F. Clarke
- Department of Zoology; La Trobe University; Melbourne; Vic; Australia
| | - A. F. Bennett
- Landscape Ecology Research Group, School of Life and Environmental Sciences; Deakin University; Burwood; Vic; Australia
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Anderson NH, McCowan LME, Fyfe EM, Chan EHY, Taylor RS, Stewart AW, Dekker GA, North RA. The impact of maternal body mass index on the phenotype of pre-eclampsia: a prospective cohort study. BJOG 2012; 119:589-95. [PMID: 22304412 DOI: 10.1111/j.1471-0528.2012.03278.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We hypothesised that among nulliparous women with pre-eclampsia, overweight or obese women would have a different phenotype of pre-eclampsia compared with normal weight women with pre-eclampsia. Specifically, they are more likely to develop term pre-eclampsia and less likely to have indicators of impaired placental perfusion, e.g. abnormal uterine artery Doppler or a small-for-gestational-age (SGA) infant. DESIGN Prospective, multicentre, cohort SCOPE study (n = 3170). SETTING New Zealand and Australia. POPULATION Nulliparous women who developed pre-eclampsia. METHODS Participants were interviewed at 14-16 weeks of gestation, uterine artery Doppler studies were performed at 19-21 weeks and pregnancy outcome was tracked prospectively. MAIN OUTCOME MEASURES Rates of abnormal uterine artery Doppler indices, term/preterm birth and SGA infants were compared between normal, overweight and obese women with pre-eclampsia. Multivariable analysis was performed to examine the association between body mass index (BMI) and term pre-eclampsia. RESULTS Of 178 women with pre-eclampsia, one underweight woman was excluded and 66 (37%) were normal weight, 52 (29%) were overweight and 59 (34%) were obese. Pre-eclampsia developed preterm in 26% of women and at term in 74% of women. There were no differences in the rates of term/preterm pre-eclampsia, abnormal uterine artery Doppler indices or SGA infants between BMI groups (P > 0.10). No independent association between BMI and term pre-eclampsia was found (P = 0.56). CONCLUSIONS Among women with pre-eclampsia, those who are overweight or obese in early pregnancy are not more likely to have term pre-eclampsia compared with women with a normal BMI. Overweight and obese women require vigilant surveillance for the development of preterm as well as term pre-eclampsia.
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Affiliation(s)
- N H Anderson
- Department of Obstetrics and Gynaecology, School of Population Health, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.
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Pavey TG, Taylor AH, Fox KR, Hillsdon M, Anokye N, Campbell JL, Foster C, Green C, Moxham T, Mutrie N, Searle J, Trueman P, Taylor RS. Effect of exercise referral schemes in primary care on physical activity and improving health outcomes: systematic review and meta-analysis. BMJ 2011; 343:d6462. [PMID: 22058134 PMCID: PMC3209555 DOI: 10.1136/bmj.d6462] [Citation(s) in RCA: 167] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To assess the impact of exercise referral schemes on physical activity and health outcomes. Design Systematic review and meta-analysis. DATA SOURCES Medline, Embase, PsycINFO, Cochrane Library, ISI Web of Science, SPORTDiscus, and ongoing trial registries up to October 2009. We also checked study references. Study selection Design: randomised controlled trials or non-randomised controlled (cluster or individual) studies published in peer review journals. POPULATION sedentary individuals with or without medical diagnosis. Exercise referral schemes defined as: clear referrals by primary care professionals to third party service providers to increase physical activity or exercise, physical activity or exercise programmes tailored to individuals, and initial assessment and monitoring throughout programmes. Comparators: usual care, no intervention, or alternative exercise referral schemes. RESULTS Eight randomised controlled trials met the inclusion criteria, comparing exercise referral schemes with usual care (six trials), alternative physical activity intervention (two), and an exercise referral scheme plus a self determination theory intervention (one). Compared with usual care, follow-up data for exercise referral schemes showed an increased number of participants who achieved 90-150 minutes of physical activity of at least moderate intensity per week (pooled relative risk 1.16, 95% confidence intervals 1.03 to 1.30) and a reduced level of depression (pooled standardised mean difference -0.82, -1.28 to -0.35). Evidence of a between group difference in physical activity of moderate or vigorous intensity or in other health outcomes was inconsistent at follow-up. We did not find any difference in outcomes between exercise referral schemes and the other two comparator groups. None of the included trials separately reported outcomes in individuals with specific medical diagnoses. Substantial heterogeneity in the quality and nature of the exercise referral schemes across studies might have contributed to the inconsistency in outcome findings. Conclusions Considerable uncertainty remains as to the effectiveness of exercise referral schemes for increasing physical activity, fitness, or health indicators, or whether they are an efficient use of resources for sedentary people with or without a medical diagnosis.
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Affiliation(s)
- T G Pavey
- Peninsula College of Medicine and Dentistry, Universities of Exeter and Plymouth, Exeter EX2 4SG, UK.
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Taylor RS, Ashton KE, Moxham T, Hooper L, Ebrahim S. Reduced dietary salt for the prevention of cardiovascular disease: a meta-analysis of randomized controlled trials (Cochrane review). Am J Hypertens 2011; 24:843-53. [PMID: 21731062 DOI: 10.1038/ajh.2011.115] [Citation(s) in RCA: 187] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Although meta-analyses of randomized controlled trials (RCTs) of salt reduction report a reduction in the level of blood pressure (BP), the effect of reduced dietary salt on cardiovascular disease (CVD) events remains unclear. METHODS We searched for RCTs with follow-up of at least 6 months that compared dietary salt reduction (restricted salt dietary intervention or advice to reduce salt intake) to control/no intervention in adults, and reported mortality or CVD morbidity data. Outcomes were pooled at end of trial or longest follow-up point. RESULTS Seven studies were identified: three in normotensives, two in hypertensives, one in a mixed population of normo- and hypertensives and one in heart failure. Salt reduction was associated with reductions in urinary salt excretion of between 27 and 39 mmol/24 h and reductions in systolic BP between 1 and 4 mm Hg. Relative risks (RRs) for all-cause mortality in normotensives (longest follow-up-RR: 0.90, 95% confidence interval (CI): 0.58-1.40, 79 deaths) and hypertensives (longest follow-up RR 0.96, 0.83-1.11, 565 deaths) showed no strong evidence of any effect of salt reduction CVD morbidity in people with normal BP (longest follow-up: RR 0.71, 0.42-1.20, 200 events) and raised BP at baseline (end of trial: RR 0.84, 0.57-1.23, 93 events) also showed no strong evidence of benefit. Salt restriction increased the risk of all-cause mortality in those with heart failure (end of trial RR 2.59, 1.04-6.44, 21 deaths).We found no information on participant's health-related quality of life. CONCLUSIONS Despite collating more event data than previous systematic reviews of RCTs (665 deaths in some 6,250 participants) there is still insufficient power to exclude clinically important effects of reduced dietary salt on mortality or CVD morbidity. Our estimates of benefits from dietary salt restriction are consistent with the predicted small effects on clinical events attributable to the small BP reduction achieved.
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Dalal HM, Wingham J, Lewin R, Doherty P, Taylor RS. Involving primary care and cardiac rehabilitation in a reorganised service could improve outcomes. Heart 2011; 97:1191; discussion 1191. [DOI: 10.1136/heartjnl-2011-300326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Abstract
BACKGROUND Topical non-steroidal anti-inflammatory drugs (NSAIDs) are clinically proven for the management of musculoskeletal conditions. It is important that prescribers and patients are aware of the safety profile of topical NSAIDs. OBJECTIVES To evaluate the risk of adverse events (AEs) associated with topical diclofenac for the treatment of acute and chronic musculoskeletal conditions. DESIGN Systematic review and meta-analysis of blinded, randomized, placebo-, vehicle- or active-controlled trials. RESULTS The risk of any type of AE experienced with topical diclofenac was slightly higher compared with placebo/vehicle (RR 1.11), but was more than 50% lower than the risk observed with active topical comparators (RR 0.53). Absolute risk values indicated differences in the risk of AEs depending on the diclofenac formulation used; in particular, lower rates of local skin reactions were observed with diclofenac patches (e.g. 2.5% in placebo/vehicle-controlled studies) and gels (4.2%) compared with diclofenac solutions containing dimethylsulfoxide (34.2%). Dry skin/crusting and rash were the most common local skin reactions reported (9.0% and 3.0% of patients, respectively, in placebo/vehicle-controlled studies), which were usually mild-to-moderate and self-resolving. The discontinuation rate due to local skin reactions with topical diclofenac (1.9%) was low and comparable with non-active comparators (0.7%), and the tolerability of topical diclofenac treatment was rated as 'good' to 'excellent' by >90% physicians and patients. CONCLUSIONS Topical diclofenac appears to be generally well tolerated for cutaneous use in acute and chronic musculoskeletal conditions.
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Affiliation(s)
- R S Taylor
- Peninsula College of Medicine & Dentistry, Universities of Exeter & Plymouth, Exeter, UK.
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Clark CE, Smith LFP, Taylor RS, Campbell JL. Nurse-led interventions used to improve control of high blood pressure in people with diabetes: a systematic review and meta-analysis. Diabet Med 2011; 28:250-61. [PMID: 21309833 DOI: 10.1111/j.1464-5491.2010.03204.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Previous reviews demonstrate uncertainty about the effectiveness of nurse-led interventions in the management of hypertension. No specific reviews in diabetes have been identified. We have systematically reviewed the evidence for effectiveness of nurse-led interventions for people with diabetes mellitus. METHODS In this systematic review and meta-analysis, searches of Medline, Embase, CINAHL and the Cochrane Central Trials register were undertaken to identify studies comparing any intervention conducted by nurses in managing hypertension in diabetes with usual doctor-led care. Additional citations were identified from papers retrieved and correspondence with authors. Outcome measures were absolute systolic and diastolic blood pressure, change in blood pressure, proportions achieving study target blood pressure and proportions prescribed anti-hypertensive medication. RESULTS Eleven studies were identified. Interventions included adoption of treatment algorithms, nurse-led clinics and nurse prescribing. Meta-analysis showed greater reductions in blood pressure in favour of any nurse-led interventions (systolic weighted mean difference -5.8 mmHg, 95% CI -9.6 to -2.0; diastolic weighted mean difference -4.2 mmHg, 95% CI -7.6 to -0.7) compared with usual doctor-led care. No overall superiority in achievement of study targets or in the use of medication was evident for any nurse-based interventions over doctor-led care. CONCLUSIONS There is some evidence for improved blood pressure outcomes with nurse-led interventions for hypertension in people with diabetes compared with doctor-led care. Nurse-based interventions require an algorithm to structure care and there is some preliminary evidence for better outcomes with nurse prescribing. Further work is needed to elucidate which nurse-led interventions are most effective.
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Affiliation(s)
- C E Clark
- Institute of Health Services Research, Peninsula College of Medicine and Dentistry, Exeter, UK.
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McCowan LME, Roberts CT, Dekker GA, Taylor RS, Chan EHY, Kenny LC, Baker PN, Moss-Morris R, Chappell LC, North RA. Risk factors for small-for-gestational-age infants by customised birthweight centiles: data from an international prospective cohort study. BJOG 2010; 117:1599-607. [DOI: 10.1111/j.1471-0528.2010.02737.x] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bond M, Mealing S, Anderson R, Elston J, Weiner G, Taylor RS, Hoyle M, Liu Z, Price A, Stein K. The effectiveness and cost-effectiveness of cochlear implants for severe to profound deafness in children and adults: a systematic review and economic model. Health Technol Assess 2010; 13:1-330. [PMID: 19799825 DOI: 10.3310/hta13440] [Citation(s) in RCA: 164] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVES To investigate whether it is clinically effective and cost-effective to provide (i) a unilateral cochlear implant for severely to profoundly deaf people (using or not using hearing aids), and (ii) a bilateral cochlear implant for severely to profoundly deaf people with a single cochlear implant (unilateral or unilateral plus hearing aid). DATA SOURCES Main electronic databases [MEDLINE; EMBASE; Cochrane Database of Systematic Reviews; CENTRAL; NHS EED; DARE; HTA (NHS-CRD); EconLit; National Research Register; and ClinicalTrials.gov] searched in October 2006, updated July 2007. REVIEW METHODS A systematic review of the literature was undertaken according to standard methods. A state-transition (Markov) model of the main care pathways deaf people might follow and the main complications and device failures was developed. RESULTS The clinical effectiveness review included 33 papers, of which only two were RCTs. They used 62 different outcome measures and overall were of moderate to poor quality. All studies in children comparing one cochlear implant with non-technological support or an acoustic hearing aid reported gains on all outcome measures, some demonstrating greater gain from earlier implantation. The strongest evidence for an advantage from bilateral over unilateral implantation was for understanding speech in noisy conditions (mean improvement 13.2%, p < 0.0001); those receiving their second implant earlier made greater gains. Comparison of bilateral with unilateral cochlear implants plus an acoustic hearing aid was compromised by small sample sizes and poor reporting, but benefits were seen with bilateral implants. Cochlear implants improved children's quality of life, and those who were implanted before attending school were more likely to do well academically and attend mainstream education than those implanted later. In adults, there was a greater benefit from cochlear implants than from non-technological support in terms of speech perception. Increased age at implantation may reduce effectiveness and there is a negative correlation between duration of deafness and effectiveness. Speech perception measures all showed benefits for cochlear implants over acoustic hearing aids [e.g. mean increase in score of 37 points in noisy conditions (p < 0.001) with BKB sentences]; however, prelingually deafened adults benefited less than those postlingually deafened (mean change scores 20% versus 62%). For unilateral versus bilateral implantation, benefits in speech perception were significant in noisy conditions on all measures [e.g. 76% for HINT sentences (p < 0.0001)]. Quality of life measured with generic and disease-specific instruments or by interview mostly showed significant gains or positive trends from using cochlear implants. The Markov model base-case analysis estimated that, for prelingually profoundly deaf children, the incremental cost-effectiveness ratio (ICER) for unilateral implantation compared with no implantation was 13,413 pounds per quality-adjusted life-year (QALY). Assuming the utility gain for bilateral implantation is the same for adults and children, the ICERs for simultaneous and sequential bilateral implantation versus unilateral implantation were 40,410 pounds and 54,098 pounds per QALY respectively. For postlingually sensorineurally profoundly deaf adults, the corresponding ICERs were 14,163 pounds, 49,559 pounds and 60,301 pounds per QALY respectively. Probabilistic threshold analyses suggest that unilateral implants are highly likely to be cost-effective for adults and children at willingness to pay thresholds of 20,000 pounds or 30,000 pounds per QALY. There are likely to be overall additional benefits from bilateral implantation, enabling children and adults to hold conversations more easily in social situations. CONCLUSIONS Unilateral cochlear implantation is safe and effective for adults and children and likely to be cost-effective in profoundly deaf adults and profoundly and prelingually deaf children. However, decisions on the cost-effectiveness of bilateral cochlear implants should take into account the high degree of uncertainty within the model regarding the probable utility gain.
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Affiliation(s)
- M Bond
- Peninsula Technology Assessment Group (PenTAG), Peninsula Medical School, Universities of Exeter and Plymouth, UK
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Taylor RS, Crosbie PB, Cook MT. Amoebic gill disease resistance is not related to the systemic antibody response of Atlantic salmon, Salmo salar L. J Fish Dis 2010; 33:1-14. [PMID: 19943840 DOI: 10.1111/j.1365-2761.2009.01108.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Amoebic gill disease (AGD) is a proliferative gill tissue response caused by Neoparamoeba perurans and is the main disease affecting Australian marine farmed Atlantic salmon. We have previously proposed that macroscopic gill health ('gill score') trajectories and challenge survival provide evidence of a change in the nature of resistance to AGD. In order to examine whether the apparent development of resistance was because of an adaptive response, serum was sequentially sampled from the same individuals over the first three rounds of natural AGD infection and from survivors of a subsequent non-intervention AGD survival challenge. The systemic immune reaction to 'wildtype'Neoparamoeba sp. was characterized by Western blot analysis and differentiated to putative carbohydrate or peptide epitopes by periodate oxidation reactions. The proportion of seropositive fish increased from 46% to 77% with each AGD round. Antibody response to carbohydrate epitope(s) was immunodominant, occurring in 43-64% of samples. Antibodies that bound peptide epitope were identified in 16% of the challenge survivors. A 1:50 (single-dilution) enzyme-linked immunosorbent assay confirmed a measurable immune titre in 13% of the survivors. There was no evidence that antibodies recognizing wildtype Neoparamoeba provided significant protection against AGD.
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Affiliation(s)
- R S Taylor
- CSIRO National Food Futures Flagship, CSIRO Marine and Atmospheric Research, Hobart, Tas. 7001, Australia.
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Yee WH, McKee T, Scotland J, Kamaluddeen M, Taylor RS. Prevalence of Hypoglycemia in Normal Newborns Using Clinical Practice Guidelines Based on Cps Recommended Definition of Hypoglycemia. Paediatr Child Health 2009. [DOI: 10.1093/pch/14.suppl_a.38aa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Taylor RS, Elston J. The use of surrogate outcomes in model-based cost-effectiveness analyses: a survey of UK Health Technology Assessment reports. Health Technol Assess 2009; 13:iii, ix-xi, 1-50. [PMID: 19203465 DOI: 10.3310/hta13080] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVES To explore the use of surrogate outcomes in Health Technology Assessment (HTA) and provide a basis for guidance for their future use, validation and reporting. This report focuses on the role of surrogate outcomes in cost-effectiveness models (CEMs) within UK HTA Programme reports. DATA SOURCES Reports published in the UK HTA Programme monograph series in 2005 and 2006 formed the sampling frame for this study. REVIEW METHODS Reports were selected on the basis that they addressed a treatment effectiveness/efficacy question, that they included a CEM and that the CEM was primarily based on a surrogate outcome. Reports addressing diagnostic, screening, aetiology, prognostic and methodological questions were excluded. Information was extracted from included reports by two reviewers using a standardised proforma. Surrogate outcomes were assessed according to two published validation frameworks [Journal of the American Medical Association (JAMA) criteria and Outcomes Measures in Rheumatology Clinical Trials (OMERACT) scoring schema]. A narrative synthesis of findings is presented in the form of tabular summaries and illustrative qualitative quotations. RESULTS A total of 35 UK HTA reports published in 2005 and 2006 addressed an effectiveness/efficacy question and contained a CEM. Of these, four were found to have based their CEM on a surrogate outcome. All four reports sourced treatment-related changes in surrogate outcomes through a systematic review of the literature; however, there was some variability in the consistency and transparency by which these reports provided evidence of the validation for the surrogate-final outcome relationship. Only one of the reports undertook a systematic review to specifically seek the evidence base for the association between surrogate and final outcomes. Furthermore, this was the only report to provide level 1 surrogate-final outcome validation evidence, i.e. RCT data showing a strong association between the change in surrogate outcome (BPAR) and the change in final outcome (graft survival) at an individual patient level. This report met the JAMA criteria for acceptable evidence of a surrogate. Two reports provided level 2 evidence, i.e. observational study data showing the relationship between the surrogate and final outcome, and one report provided level 3 evidence, i.e. a review of disease natural history. None of the four reports achieved a sufficient score on the OMERACT schema to be judged to have acceptable evidence of a surrogate outcome by its authors. CONCLUSIONS In this survey of UK HTA reports about 10% of the CEMs therein were explicitly based on surrogate outcomes. The strength of evidence for the surrogate-final outcome relationship, transparency of quantification and exploration of uncertainty of this relationship were found to vary considerably. Recommendations are made for the use of surrogate outcomes in future HTA reports.
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Affiliation(s)
- R S Taylor
- Peninsula Technology Assessment Group (PenTAG), Peninsula Medical School, Universities of Exeter and Plymouth, UK
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Chen YF, Jobanputra P, Barton P, Bryan S, Fry-Smith A, Harris G, Taylor RS. Cyclooxygenase-2 selective non-steroidal anti-inflammatory drugs (etodolac, meloxicam, celecoxib, rofecoxib, etoricoxib, valdecoxib and lumiracoxib) for osteoarthritis and rheumatoid arthritis: a systematic review and economic evaluation. Health Technol Assess 2008; 12:1-278, iii. [PMID: 18405470 DOI: 10.3310/hta12110] [Citation(s) in RCA: 195] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVES To review the clinical effectiveness and cost-effectiveness of cyclooxygenase-2 (COX-2) selective non-steroidal anti-inflammatory drugs (NSAIDs) (etodolac, meloxicam, celecoxib, rofecoxib, etoricoxib, valdecoxib and lumiracoxib) for osteoarthritis (OA) and rheumatoid arthritis (RA). DATA SOURCES Electronic databases were searched up to November 2003. Industry submissions to the National Institute for Health and Clinical Excellence (NICE) in 2003 were also reviewed. REVIEW METHODS Systematic reviews of randomised controlled trials (RCTs) and a model-based economic evaluation were undertaken. Meta-analyses were undertaken for each COX-2 selective NSAID compared with placebo and non-selective NSAIDs. The model was designed to run in two forms: the 'full Assessment Group Model (AGM)', which includes an initial drug switching cycle, and the 'simpler AGM', where there is no initial cycle and no opportunity for the patient to switch NSAID. RESULTS Compared with non-selective NSAIDs, the COX-2 selective NSAIDs were found to be equally as efficacious as the non-selective NSAIDs (although meloxicam was found to be of inferior or equivalent efficacy) and also to be associated with significantly fewer clinical upper gastrointestinal (UGI) events (although relatively small numbers of clinical gastrointestinal (GI) and myocardial infarction (MI) events were reported across trials). Subgroup analyses of clinical and complicated UGI events and MI events in relation to aspirin use, steroid use, prior GI history and Helicobacter pylori status were based on relatively small numbers and were inconclusive. In the RCTs that included direct COX-2 comparisons, the drugs were equally tolerated and of equal efficacy. Trials were of insufficient size and duration to allow comparison of risk of clinical UGI events, complicated UGI events and MIs. One RCT compared COX-2 (celecoxib) with a non-selective NSAID combined with a gastroprotective agent (diclofenac combined with omeprazole); this included arthritis patients who had recently suffered a GI haemorrhage. Although no significant difference in clinical GI events was reported, the number of events was small and more such studies, where patients genuinely need NSAIDs, are required to confirm these data. A second trial showed that rofecoxib was associated with fewer diarrhoea events than a combination of diclofenac and misoprostol (Arthrotec). Previously published cost-effectiveness analyses indicated a wide of range of possible incremental cost per quality-adjusted life-year (QALY) gained estimates. Using the simpler AGM, with ibuprofen or diclofenac alone as the comparator, all of the COX-2 products are associated with higher costs (i.e. positive incremental costs) and small increases in effectiveness (i.e. positive incremental effectiveness), measured in terms of QALYs. The magnitude of the incremental costs and the incremental effects, and therefore the incremental cost-effectiveness ratios, vary considerably across all COX-2 selective NSAIDs. The base-case incremental cost per QALY results for COX-2 selective NSAIDs compared with diclofenac for the simpler model are: celecoxib (low dose) 68,400 pounds; celecoxib (high dose) 151,000 pounds; etodolac (branded) 42,400 pounds; etodolac (generic) 17,700 pounds; etoricoxib 31,300 pounds; lumiracoxib 70,400 pounds; meloxicam (low dose) 10,300 pounds; meloxicam (high dose) 17,800 pounds; rofecoxib 97,400 pounds; and valdecoxib 35,500 pounds. When the simpler AGM was run using ibuprofen or diclofenac combined with proton pump inhibitor (PPI) as the comparator, the results change substantially, with the COX-2 selective NSAIDs looking generally unattractive from a cost-effectiveness point of view (COX-2 selective NSAIDs were dominated by ibuprofen or diclofenac combined with PPI in most cases). This applies both to 'standard' and 'high-risk' arthritis patients defined in terms of previous GI ulcers. The full AGM produced results broadly in line with the simpler model. CONCLUSIONS The COX-2 selective NSAIDs examined were found to be similar to non-selective NSAIDs for the symptomatic relief of RA and OA and to provide superior GI tolerability (the majority of evidence is in patients with OA). Although COX-2 selective NSAIDs offer protection against serious GI events, the amount of evidence for this protective effect varied considerably across individual drugs. The volume of trial evidence with regard to cardiovascular safety also varied substantially between COX-2 selective NSAIDs. Increased risk of MI compared to non-selective NSAIDs was observed among those drugs with greater volume of evidence in terms of exposure in patient-years. Economic modelling shows a wide range of possible costs per QALY gained in patients with OA and RA. Costs per QALY also varied if individual drugs were used in 'standard' or 'high'-risk patients, the choice of non-selective NSAID comparator and whether that NSAID was combined with a PPI. With reduced costs of PPIs, future primary research needs to compare the effectiveness and cost-effectiveness of COX-2 selective NSAIDs relative to non-selective NSAIDs with a PPI. Direct comparisons of different COX-2 selective NSAIDs, using equivalent doses, that compare GI and MI risk are needed. Pragmatic studies that include a wider range of people, including the older age groups with a greater burden of arthritis, are also necessary to inform clinical practice.
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Affiliation(s)
- Y-F Chen
- Department of Public Health and Epidemiology, University of Birmingham, UK
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Abstract
Circularly polarized (CP) femtosecond laser light focused into fused silica produces a permanent recording of optical helicity. Material modification is in the form of highly ordered submicrometer chiral structures whose handedness follows the handedness of the CP light. The evolution of the ordered structures from chaotic modification is described.
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Affiliation(s)
- R S Taylor
- National Research Council of Canada, Ottawa, ON, Canada.
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Zacher J, Altman R, Bellamy N, Brühlmann P, Da Silva J, Huskisson E, Taylor RS. Topical diclofenac and its role in pain and inflammation: an evidence-based review. Curr Med Res Opin 2008; 24:925-50. [PMID: 18279583 DOI: 10.1185/030079908x273066] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Topical diclofenac is widely used in the treatment of pain and inflammation. This comprehensive review assesses the safety and efficacy of topical diclofenac in a range of painful and inflammatory disorders. METHODS Double-blind, randomized, placebo- or active-controlled trials (RCT) evaluating topical diclofenac in soft-tissue injuries, soft-tissue rheumatic disorders and osteoarthritis were identified through detailed literature searches. In addition, non-RCT evidence from publications evaluating the pharmacologic characteristics of topical diclofenac were also included in this review to obtain a more complete picture of the drug's profile, its efficacy and safety. RESULTS Studies demonstrate that the drug preferentially distributes to the target tissues in sufficient concentrations to produce a therapeutic effect. A total of 19 double-blind RCTs in more than 3000 patients, supported by single-blind or open trials, consistently show that topical diclofenac significantly reduces pain and inflammation in acute and chronic conditions compared with placebo and is comparable to other topical non-steroidal anti-inflammatory drugs (NSAIDs) and some oral NSAIDs (diclofenac, ibuprofen, naproxen). Improvements have also been observed in patients' functional capacity and mobility. Topical diclofenac is well tolerated, resulting mostly in mild, easily resolved local skin irritation, and is associated with fewer side-effects than other topical NSAIDs and a lower rate of gastrointestinal complications than oral NSAIDs (diclofenac, ibuprofen, naproxen). CONCLUSION This evidence-based review shows topical diclofenac to be an effective and well tolerated treatment in painful and inflammatory conditions, at least in the short-term. However, only published RCT studies have been included in this analysis, which may exclude some interesting data from non-RCT studies. Future trials of topical diclofenac need to be of longer duration, be better reported and consider a broader spectrum of acute and chronic pain indications.
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Affiliation(s)
- J Zacher
- Department of Orthopedic Surgery and Orthopedic Rheumatology, HELIOS Hospital Group, Berlin, Germany
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Jolly K, Lip GYH, Taylor RS, Raftery J, Mant J, Lane D, Greenfield S, Stevens A. The Birmingham Rehabilitation Uptake Maximisation study (BRUM): a randomised controlled trial comparing home-based with centre-based cardiac rehabilitation. Heart 2008; 95:36-42. [PMID: 18332063 DOI: 10.1136/hrt.2007.127209] [Citation(s) in RCA: 111] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE To compare the outcomes of home-based (using the Heart Manual) and centre-based cardiac rehabilitation programmes. DESIGN Randomised controlled trial and parallel economic evaluation. SETTING Predominantly inner-city, multi-ethnic population in the West Midlands, England. PATIENTS 525 patients referred to four hospitals for cardiac rehabilitation following myocardial infarction or coronary revascularisation. INTERVENTIONS A home-based cardiac rehabilitation programme compared with centre-based programmes. MAIN OUTCOME MEASURES Smoking cessation, blood pressure (systolic blood pressure (SBP), diastolic blood pressure (DBP)), total cholesterol (TC) and high-density lipoprotein (HDL)-cholesterol, psychological status (HADS anxiety and depression) and exercise capacity (incremental shuttle walking test, ISWT) measured at 12 months. Health service resource use, quality of life utility and costs were quantified. RESULTS There were no significant differences in the main outcomes when the home-based was compared with the centre-based programme at 12 months. Adjusted mean difference (95% CI) for SBP was 1.94 mm Hg (-1.1 to 5.0); DBP 0.42 mm Hg (-1.25 to 2.1); TC 0.1 mmol/l (-0.05 to 0.24); HADS anxiety -0.02 (-0.69 to 0.65); HADS depression -0.35 (-0.95 to 0.25); distance on ISWT -21.5 m (-48.3 to 5.2). The relative risk of being a smoker in the home arm was 0.90. The cost per patient to the NHS was significantly higher in the home arm at 198 pounds, (95% CI 189 to 208) compared to 157 pounds (95% CI 139 to 175) in the centre-based arm. However when the patients' cost of travel was included, these differences were no longer significant. Conclusions A home-based cardiac rehabilitation programme does not produce inferior outcomes when compared to traditional centre-based programmes as provided in the United Kingdom.
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Affiliation(s)
- K Jolly
- Department of Public Health and Epidemiology, University of Birmingham, Birmingham, UK.
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Taylor RS, Hnatovsky C, Simova E, Rajeev PP, Rayner DM, Corkum PB. Femtosecond laser erasing and rewriting of self-organized planar nanocracks in fused silica glass. Opt Lett 2007; 32:2888-90. [PMID: 17909607 DOI: 10.1364/ol.32.002888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Tightly focused, linearly polarized, femtosecond laser radiation can produce highly birefringent nanograting structures inside fused silica glass. Here we report that when the polarization direction of the femtosecond light is changed, old nanogratings are erased and simultaneously replaced with new ones whose orientation is solely determined by the polarization of the rewrite beam. We also show that these volume nanogratings can be rewritten 1000 times with little degradation in their quality.
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Affiliation(s)
- R S Taylor
- National Research Council of Canada, Canada.
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Cruccu G, Aziz TZ, Garcia-Larrea L, Hansson P, Jensen TS, Lefaucheur JP, Simpson BA, Taylor RS. EFNS guidelines on neurostimulation therapy for neuropathic pain. Eur J Neurol 2007; 14:952-70. [PMID: 17718686 DOI: 10.1111/j.1468-1331.2007.01916.x] [Citation(s) in RCA: 430] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Pharmacological relief of neuropathic pain is often insufficient. Electrical neurostimulation is efficacious in chronic neuropathic pain and other neurological diseases. European Federation of Neurological Societies (EFNS) launched a Task Force to evaluate the evidence for these techniques and to produce relevant recommendations. We searched the literature from 1968 to 2006, looking for neurostimulation in neuropathic pain conditions, and classified the trials according to the EFNS scheme of evidence for therapeutic interventions. Spinal cord stimulation (SCS) is efficacious in failed back surgery syndrome (FBSS) and complex regional pain syndrome (CRPS) type I (level B recommendation). High-frequency transcutaneous electrical nerve stimulation (TENS) may be better than placebo (level C) although worse than electro-acupuncture (level B). One kind of repetitive transcranial magnetic stimulation (rTMS) has transient efficacy in central and peripheral neuropathic pains (level B). Motor cortex stimulation (MCS) is efficacious in central post-stroke and facial pain (level C). Deep brain stimulation (DBS) should only be performed in experienced centres. Evidence for implanted peripheral stimulations is inadequate. TENS and r-TMS are non-invasive and suitable as preliminary or add-on therapies. Further controlled trials are warranted for SCS in conditions other than failed back surgery syndrome and CRPS and for MCS and DBS in general. These chronically implanted techniques provide satisfactory pain relief in many patients, including those resistant to medication or other means.
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Affiliation(s)
- G Cruccu
- EFNS Panel on Neuropathic Pain, Vienna, Austria.
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Cooper KD, Hammerberg C, Baadsgaard O, Elder JT, Chan LS, Taylor RS, Voorhees JJ, Fisher G. Interleukin-1 in human skin: dysregulation in psoriasis. J Invest Dermatol 2007; 95:24S-26S. [PMID: 16788624 DOI: 10.1111/1523-1747.ep12505698] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cytokine dysregulation is an attractive concept to explain many of the observed abnormalities in psoriasis. IL-1, in particular, can potentiate immune cellular activation, activate fibroblasts, and increase endothelial cell adhesiveness to leukocytes. Here, we review IL-1 regulation in normal and psoriatic skin in vivo in relation to normal skin and cultured keratinocytes. Contrary to expectations, IL-1 functional activity in psoriatic lesions is reduced, not increased, relative to normal skin. The reduction is attributable to the presence of IL-1 inhibitors, reduced IL-1alpha levels, and an IL-1beta that lacked function in T-cell assays. IL-1beta protein is actually significantly increased in psoriatic lesions, but the mechanism of its non-functionality remains unclear. Unlike cultured keratinocytes, which accumulate large, inactive IL-1beta precursors, both normal and psoriatic skin process IL-1beta to a mature form. Novel mechanisms of post-translational processing by epidermis in vivo may generate a novel form of IL-1beta with unknown functions. The marked abnormalities of IL-1 regulation in psoriatic skin suggest that this molecule may be important in normal skin homeostasis.
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Affiliation(s)
- K D Cooper
- Department of Dermatology, The University of Michigan, Ann Arbor, Michigan 48109, USA
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Taylor RS, Watt A, Dalal HM, Evans PH, Campbell JL, Read KLQ, Mourant AJ, Wingham J, Thompson DR, Pereira Gray DJ. Home-based cardiac rehabilitation versus hospital-based rehabilitation: A cost effectiveness analysis. Int J Cardiol 2007; 119:196-201. [PMID: 17084927 DOI: 10.1016/j.ijcard.2006.07.218] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2006] [Revised: 07/21/2006] [Accepted: 07/29/2006] [Indexed: 11/20/2022]
Abstract
BACKGROUND Home-based cardiac rehabilitation offers an alternative to traditional, hospital-based cardiac rehabilitation. AIM To compare the cost effectiveness of home-based cardiac rehabilitation and hospital-based cardiac rehabilitation. METHODS 104 patients with an uncomplicated acute myocardial infarction and without major comorbidity were randomized to receive home-based rehabilitation (n=60) i.e. nurse facilitated, self-help package of 6 weeks' duration (the Heart Manual) or hospital-based rehabilitation for 8-10 weeks (n=44). Complete economic data were available in 80 patients (48 who received home-based rehabilitation and 32 who received hospital-based rehabilitation). Healthcare costs, patient costs, and quality of life (EQ-5D4.13) were assessed over the 9 months of the study. RESULTS The cost of running the home-based rehabilitation programme was slightly lower than that of the hospital-based programme (mean (95% confidence interval) difference - 30 pounds sterling (- 45 pounds sterling to - 12 pounds sterling) [-44 euro, -67 euro to -18 euro] per patient. The cost difference was largely the result of reduced personnel costs. Over the 9 months of the study, no significant difference was seen between the two groups in overall healthcare costs (78 pounds sterling, - 1102 pounds sterling to 1191 pounds sterling [-115 euro, -1631 euro to -1763 euro] per patient) or quality adjusted life-years (-0.06 (-0.15 to 0.02)). The lack of significant difference between home-based rehabilitation and hospital-based rehabilitation did not alter when different costs and different methods of analysis were used. CONCLUSIONS The health gain and total healthcare costs of the present hospital-based and home-based cardiac rehabilitation programmes for patients after myocardial infarction appear to be similar. These initial results require affirmation by further economic evaluations of cardiac rehabilitation in different settings.
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Hnatovsky C, Simova E, Rajeev PP, Rayner DM, Corkum PB, Taylor RS. Femtosecond laser writing of porous capillaries inside fused silica glass. Opt Lett 2007; 32:1459-61. [PMID: 17546154 DOI: 10.1364/ol.32.001459] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We demonstrate that within a restricted optical pulse duration-pulse energy parameter space tightly focused femtosecond laser radiation can be used to fabricate porous capillaries in bulk fused silica glass by simply moving the laser focus through the material. We show that the rate of penetration of liquids into the porous capillaries can be controlled by the laser polarization, which determines their morphology. The fluid propagation is measured using the form birefringence of nanocrack/nanovoid structures produced inside the capillaries. We also demonstrate the nanofiltration capabilities of the capillaries by separating the relatively small molecules of Rhodamine 6G dye from their solvent.
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Affiliation(s)
- C Hnatovsky
- National Research Council of Canada, Ottawa, Ontario, Canada.
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Yao G, Albon E, Adi Y, Milford D, Bayliss S, Ready A, Raftery J, Taylor RS. A systematic review and economic model of the clinical and cost-effectiveness of immunosuppressive therapy for renal transplantation in children. Health Technol Assess 2007; 10:iii-iv, ix-xi, 1-157. [PMID: 17134597 DOI: 10.3310/hta10490] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
OBJECTIVES To review the clinical and cost-effectiveness of basiliximab, daclizumab, tacrolimus, mycophenolate mofetil (MMF), mycophenolate sodium (MPS) and sirolimus as possible immunosuppressive therapies for renal transplantation in children. DATA SOURCES Electronic databases were searched up to November 2004. REVIEW METHODS Data from selected studies were extracted and quality assessed. An economic model [Birmingham Sensitivity Analysis paediatrics (BSAp)] was produced based on an adaptation of a model previously developed for the assessment of the cost-effectiveness of immunosuppressants in adults following renal transplant. RESULTS For the addition of basiliximab, one unpublished paediatric randomised control trial (RCT), reported that the addition of basiliximab to tacrolimus-based triple therapy (BTAS) failed to significantly improve 6-month biopsy-proven acute rejection (BPAR), graft function, graft loss and all-cause mortality. No significant difference between groups was seen in 6-month or 1-year or longer graft loss, all-cause mortality and side-effects. In a meta-analysis of adult RCTs, the addition of basiliximab to a ciclosporin, azathioprine and steroid regimen (CAS) significantly reduced short-term BPAR. There was no significant difference in short- or long-term graft loss, all-cause mortality or side-effects. One adult RCT was included for the addition of daclizumab to CAS, which reported reduced 1-year BPAR, although no difference between groups was seen in either 1- or 3-year graft loss, all-cause mortality and side-effects. For tacrolimus versus ciclosporin, one unpublished paediatric RCT found that a regimen of tacrolimus, azathioprine and a steroid (TAS) reduced 6-month BPAR and improved graft function [glomerular filtration rate (GFR)] compared with CAS. This improvement in BPAR with tacrolimus was as shown in the meta-analysis of adult RCTs. There was evidence, particularly in children, that in comparison with ciclosporin, tacrolimus may reduce long-term graft loss, although there is no benefit on total mortality. The total level of withdrawal in children was reduced in children receiving tacrolimus. Adult RCTs showed an increase in post-transplant diabetes mellitus with tacrolimus. For MMF versus azathioprine, a meta-analysis of adult RCTs showed MMF [regimen of ciclosporin, MMF and a steroid (CMS)] to reduce 1-year BPAR compared with azathioprine (CAS). There was evidence, particularly in children, that in comparison with azathioprine, tacrolimus may reduce long-term graft loss, although there is no benefit on total mortality. There was an increase in the level of cytomegalovirus infection with MMF, although the overall level of withdrawal due to adverse events was not different to that of azathioprine-treated adults. No study comparing MPS with azathioprine (CAS) was identified. In an adult RCT comparing MMF with MPS, there was no significant difference between groups in 1-year efficacy or side-effects. One unpublished paediatric RCT assessed the addition of sirolimus to CAS. BPAR, graft loss and all-cause mortality were not reported. In two adult RCTs, compared with azathioprine, sirolimus reduced 1-year BPAR, reduced graft function (as assessed by an increased serum creatinine) and increased the level of hyperlipidaemia. No significant differences were seen in other efficacy and side-effect outcomes. On an adult RCT comparing sirolimus with ciclosporin, there were no significant differences between groups in 1-year efficacy or side-effects with the exception of an increased level of hyperlipidaemia with sirolimus substitution. Both the assessment group and drug companies assessed the cost-effectiveness of the newer renal immunosuppressants currently licensed in children using an adaptation (BSAp) of the Birmingham Sensitivity Analysis (BSA) model. This model is based on a 10-year extrapolation of 1-year BPAR results sourced from paediatric RCTs or adult RCTs (where paediatric RCTs were not available). The addition of basiliximab and that of daclizumab to CAS was found to increase quality-adjusted life-years (QALYs) and decreased overall costs, a finding that was robust to sensitivity analyses. The incremental cost-effectiveness ratio (ICER) of replacing ciclosporin with tacrolimus was highly sensitive to the selection of the hazard ratio for graft loss from acute rejection, dialysis costs and the incorporation (or not) of side-effects. The ICERs for tacrolimus versus ciclosporin ranged from about 46,000 pounds/QALY to about 146,000 pounds/QALY. Although sensitive to varying the hazard ratio for graft loss with acute rejection, the ICER for replacing azathioprine with MMF remained in excess of 55,000 pounds/QALY. CONCLUSIONS In general, compared with a regimen of ciclosporin, azathioprine and steroid, the newer immunosuppressive agents consistently reduced the incidence of short-term biopsy-proven acute rejection. However, evidence of the impact on side-effects, long-term graft loss, compliance and overall health-related quality of life is limited. Cost-effectiveness was estimated based on the relationship between short-term acute rejection levels from RCTs and long-term graft loss. Both the addition of daclizumab and that of basiliximab were found to be dominant strategies, that is, regarding cost savings and increased QALYs. The incremental cost-effectiveness of tacrolimus relative to ciclosporin was highly sensitive to key model parameter values and therefore may well be a cost-effective strategy. The incremental cost-effectiveness of MMF compared with azathioprine, although also sensitive to model parameter, was unattractive. There is a particular need for RCTs to assess the use of MMF, MPS and daclizumab for renal transplantation in children where no such evidence currently exists. Future comparative studies need to report not only on the impact of the newer immunosuppressants on short- and long-term clinical outcomes but also on side-effects, compliance, healthcare resource, costs and health-related quality of life.
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Affiliation(s)
- G Yao
- Health Economics Facility, Health Services Management Centre, University of Birmingham, UK
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