1
|
Hereijgers MJ, van der Velden RM, el Moussaoui N, Verhaert DV, Habibi Z, Luermans J, den Uijl D, Chaldoupi SM, Vernooy K, Schotten U, Baumert M, Gietema HA, Mihl C, Koltowski L, Franssen FM, Simons SO, Linz D. Repurposing catheter ablation work-up to detect expiratory airflow limitation in patients with atrial fibrillation. IJC HEART & VASCULATURE 2023; 49:101305. [PMID: 38053981 PMCID: PMC10694302 DOI: 10.1016/j.ijcha.2023.101305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/01/2023] [Accepted: 11/13/2023] [Indexed: 12/07/2023]
Abstract
Background In atrial fibrillation (AF) patients, presence of expiratory airflow limitation may negatively impact treatment outcomes. AF patients are not routinely screened for expiratory airflow limitation, but existing examinations can help identify at-risk individuals. We aimed to assess the diagnostic value of repurposing existing assessments from the pre-ablation work-up to identify and understand the characteristics of affected patients. Methods We screened 110 consecutive AF patients scheduled for catheter ablation with handheld spirometry. Routine pre-ablation work-up included cardiac computed tomographic angiography (CCTA), transthoracic echocardiography and polygraphy. CCTA was analyzed qualitatively for emphysema and airway abnormalities. Multivariate logistic regression analysis was performed to determine predictors of expiratory airflow limitation. Results We found that 25 % of patients had expiratory airflow limitation, which was undiagnosed in 86 % of these patients. These patients were more likely to have pulmonary abnormalities on CCTA, including emphysema (odds ratio [OR] 4.2, 95 % confidence interval [CI] 1.12-15.1, p < 0.05) and bronchial wall thickening (OR 2.6, 95 % CI 1.0-6.5, p < 0.05). The absence of pulmonary abnormalities on CCTA accurately distinguished patients with normal lung function from those with airflow limitation (negative predictive value: 85 %). Echocardiography and polygraphy did not contribute significantly to identifying airflow limitation. Conclusions In conclusion, routine pre-ablation CCTA can detect pulmonary abnormalities in AF patients with airflow limitation, guiding further pulmonary assessment. Future studies should investigate its impact on ablation procedure success.
Collapse
Affiliation(s)
- Maartje J.M. Hereijgers
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Rachel M.J. van der Velden
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Nora el Moussaoui
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Dominique V.M. Verhaert
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
- Department of Cardiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Zarina Habibi
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
- Department of Cardiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Justin Luermans
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Dennis den Uijl
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Sevasti-Maria Chaldoupi
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Kevin Vernooy
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Ulrich Schotten
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
| | - Mathias Baumert
- Discipline of Biomedical Engineering, The University of Adelaide, Adelaide, Australia
| | - Hester A. Gietema
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
- GROW School for Oncology and Developmental Biology, Maastricht University, Maastricht, The Netherlands
| | - Casper Mihl
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Lukasz Koltowski
- First Department of Cardiology, Medical University of Warsaw, Warsaw, Poland
| | - Frits M.E. Franssen
- Department of Research and Development, Ciro, Horn, The Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Sami O. Simons
- Department of Respiratory Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
- NUTRIM Research Institute of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Dominik Linz
- Department of Cardiology, Maastricht University Medical Center, Maastricht, The Netherlands
- CARIM Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
- Department of Cardiology, Radboud University Medical Center, Nijmegen, The Netherlands
- Centre for Heart Rhythm Disorders, University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
2
|
Lin CH, Cheng SL, Chen CZ, Chen CH, Lin SH, Wang HC. Current Progress of COPD Early Detection: Key Points and Novel Strategies. Int J Chron Obstruct Pulmon Dis 2023; 18:1511-1524. [PMID: 37489241 PMCID: PMC10363346 DOI: 10.2147/copd.s413969] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/09/2023] [Indexed: 07/26/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a major cause of morbidity and mortality worldwide, with approximately 70% to 80% of adults with COPD being undiagnosed. Patients with undiagnosed COPD are at increased risk of poor outcomes and a worsened quality of life, making early detection a crucial strategy to mitigate the impact of COPD and reduce the burden on healthcare systems. In the past decade, increased interest has been focused on the development of effective strategies and instrument for COPD early detection. However, identifying undiagnosed cases of COPD is still challenging. Both screening and case-finding approaches have been adopted to identify undiagnosed COPD, with case-finding being recommended by the 2023 Global Initiative for Chronic Obstructive Lung Disease (GOLD) guideline and the updated United States Preventive Services Task Force (USPTF) recommendation. Nonetheless, the approaches, criteria, and instruments used for early detection of COPD are varied. However, advances in the taxonomy and risk factors of COPD are continuously being investigated. It is important to continuously assess the current state of knowledge on COPD early detection, given the challenges associated with identifying undiagnosed COPD. This review aims to highlight recent advances in early detection of COPD. To discuss the current challenge and opportunity in COPD early detection, providing an overview of existing literature on COPD case-finding strategies, including the approaches, criteria for subjects, and instruments. The review also summarizes the current progress in COPD case-findings and proposes a COPD case-finding flowchart as an efficient method for identifying at risk COPD patients.
Collapse
Affiliation(s)
- Ching-Hsiung Lin
- Division of Chest Medicine, Changhua Christian Hospital, Changhua, 500, Taiwan
- Institute of Genomics and Bioinformatics, National Chung Hsing University, Taichung, 402, Taiwan
- Ph.D. Program in Translational Medicine, National Chung Hsing University, Taichung, Taiwan
- Department of Recreation and Holistic Wellness, MingDao University, Changhua, Taiwan
| | - Shih-Lung Cheng
- Department of Internal Medicine, Far Eastern Memorial Hospital, Taipei, 220, Taiwan
- Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, 320, Taiwan
| | - Chiung-Zuei Chen
- Division of Pulmonary Medicine, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Hung Chen
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, China Medical University Hospital, Taichung, 404, Taiwan
| | - Sheng-Hao Lin
- Division of Chest Medicine, Changhua Christian Hospital, Changhua, 500, Taiwan
| | - Hao-Chien Wang
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, 100, Taiwan
| |
Collapse
|
3
|
van der Velden RMJ, Hereijgers MJM, Arman N, van Middendorp N, Franssen FME, Gawalko M, Verhaert DVM, Habibi Z, Vernooy K, Koltowski L, Hendriks JM, Heidbuchel H, Desteghe L, Simons SO, Linz D. Implementation of a screening and management pathway for chronic obstructive pulmonary disease in patients with atrial fibrillation. Europace 2023; 25:euad193. [PMID: 37421318 PMCID: PMC10351574 DOI: 10.1093/europace/euad193] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 05/02/2023] [Accepted: 05/30/2023] [Indexed: 07/10/2023] Open
Abstract
AIMS Chronic obstructive pulmonary disease (COPD) negatively impacts the efficacy of heart rhythm control treatments in patients with atrial fibrillation (AF). Although COPD is recognized as a risk factor for AF, practical guidance about how and when to screen for COPD is not available. Herein, we describe the implementation of an integrated screening and management pathway for COPD into the existing pre-ablation work-up in an AF outpatient clinic infrastructure. METHODS AND RESULTS Consecutive unselected patients accepted for AF catheter ablation in the Maastricht University Medical Center+ were prospectively screened for airflow limitation using handheld (micro)spirometry at the pre-ablation outpatient clinic supervised by an AF nurse. Patients with results suggestive of airflow limitation were offered referral to the pulmonologist. Handheld (micro)spirometry was performed in 232 AF patients, which provided interpretable results in 206 (88.8%) patients. Airflow limitation was observed in 47 patients (20.3%). Out of these 47 patients, 29 (62%) opted for referral to the pulmonologist. The primary reason for non-referral was low perceived symptom burden. Using this screening strategy 17 (out of 232; 7.3%) ultimately received a diagnosis of chronic respiratory disease, either COPD or asthma. CONCLUSION A COPD care pathway can successfully be embedded in an existing AF outpatient clinic infrastructure, using (micro)spirometry and remote analysis of results. Although one out of five patients had results suggestive of an underlying chronic respiratory disease, only 62% of these patients opted for a referral. Pre-selection of patients as well as patient education might increase the diagnostic yield and requires further research.
Collapse
Affiliation(s)
- Rachel M J van der Velden
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Maartje J M Hereijgers
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Nazia Arman
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Naomi van Middendorp
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
| | - Frits M E Franssen
- Department of Research and Development, Ciro, 6085 NM Horn, the Netherlands
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, 6200 MD Maastricht, the Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre, 6229 HX Maastricht, the Netherlands
| | - Monika Gawalko
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
- 1st Department of Cardiology, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Dominique V M Verhaert
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
- Department of Cardiology, Radboud University Medical Centre, 6525 GA Nijmegen, the Netherlands
| | - Zarina Habibi
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
- Department of Cardiology, Radboud University Medical Centre, 6525 GA Nijmegen, the Netherlands
| | - Kevin Vernooy
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
- Department of Cardiology, Radboud University Medical Centre, 6525 GA Nijmegen, the Netherlands
| | - Lukasz Koltowski
- 1st Department of Cardiology, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Jeroen M Hendriks
- Caring Futures Institute, College of Nursing and Health Sciences, Flinders University, 5001 Adelaide, Australia
- Centre for Heart Rhythm Disorders, University of Adelaide and Royal Adelaide Hospital, 5000 Adelaide, Australia
| | - Hein Heidbuchel
- Department of Cardiology, Antwerp University Hospital, 2650 Antwerp, Belgium
- Research Group Cardiovascular Diseases, University of Antwerp, 2650 Antwerp, Belgium
- Faculty of Medicine and Life Sciences, Hasselt University, 3590 Hasselt, Belgium
| | - Lien Desteghe
- Department of Cardiology, Antwerp University Hospital, 2650 Antwerp, Belgium
- Research Group Cardiovascular Diseases, University of Antwerp, 2650 Antwerp, Belgium
- Faculty of Medicine and Life Sciences, Hasselt University, 3590 Hasselt, Belgium
- Heart Center Hasselt, Jessa Hospital, 3500 Hasselt, Belgium
| | - Sami O Simons
- NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, 6200 MD Maastricht, the Netherlands
- Department of Respiratory Medicine, Maastricht University Medical Centre, 6229 HX Maastricht, the Netherlands
| | - Dominik Linz
- Department of Cardiology, Maastricht University Medical Centre and Cardiovascular Research Institute Maastricht, P. Debyelaan 25, 6229 HX Maastricht, the Netherlands
- Department of Cardiology, Radboud University Medical Centre, 6525 GA Nijmegen, the Netherlands
- Centre for Heart Rhythm Disorders, University of Adelaide and Royal Adelaide Hospital, 5000 Adelaide, Australia
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| |
Collapse
|
4
|
Accuracy of portable spirometers in the diagnosis of chronic obstructive pulmonary disease A meta-analysis. NPJ Prim Care Respir Med 2022; 32:15. [PMID: 35440665 PMCID: PMC9019105 DOI: 10.1038/s41533-022-00275-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 02/11/2022] [Indexed: 12/03/2022] Open
Abstract
Portable spirometers has been approved for diagnosing chronic obstructive pulmonary disease (COPD). However, their diagnostic accuracy has not been reviewed. Therefore, the purpose of this study was to systematically evaluate the diagnostic value of portable spirometers in detecting COPD. A comprehensive literature search for relevant studies was conducted in PubMed, Embase, CNKI, Wan Fang, and Web of Science databases. Pooled sensitivity, specificity, summary receiver operating characteristic (SROC), area under the curve (AUC), and other related indices were calculated using the bivariate mixed-effect model. Subgroup analysis was performed to explore the source of heterogeneity. Thirty one studies were included in the meta-analysis. The pooled sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic ratio (DOR), SROC, and AUC of the SROC of portable spirometers were 0.85 (0.81–0.88), 0.85 (0.81–0.88), 5.6 (4.4–7.3), 0.18 (0.15–0.22), 31 (21–46) and 0.91 (0.89–0.94), respectively. Among the three commonly used types of portable spirometers, the accuracy of PIKO-6 was higher (0.95) than that of COPD-6 (0.91) and PEF (0.82). Subgroup analysis indicated that the accuracy of a multi-indices portable spirometer was higher than that of a single-index one (P < 0.05). In addition, portable spirometry performed by professional technicians in tertiary hospitals was more accurate than for those conducted by trained technicians in primary care facilities and communities (P < 0.05). Moreover, the accuracy of studies conducted in developing country was superior to developed country (P < 0.05). Portable spirometers have high accuracy in the diagnosis of COPD. Multi-index COPD-6 and PIKO-6 displayed higher accuracy than others. Standardized training of instrument operators should be considered to achieve reliable results.
Collapse
|
5
|
Adab P, Jordan RE, Fitzmaurice D, Ayres JG, Cheng KK, Cooper BG, Daley A, Dickens A, Enocson A, Greenfield S, Haroon S, Jolly K, Jowett S, Lambe T, Martin J, Miller MR, Rai K, Riley RD, Sadhra S, Sitch A, Siebert S, Stockley RA, Turner A. Case-finding and improving patient outcomes for chronic obstructive pulmonary disease in primary care: the BLISS research programme including cluster RCT. PROGRAMME GRANTS FOR APPLIED RESEARCH 2021. [DOI: 10.3310/pgfar09130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background
Chronic obstructive pulmonary disease is a major contributor to morbidity, mortality and health service costs but is vastly underdiagnosed. Evidence on screening and how best to approach this is not clear. There are also uncertainties around the natural history (prognosis) of chronic obstructive pulmonary disease and how it impacts on work performance.
Objectives
Work package 1: to evaluate alternative methods of screening for undiagnosed chronic obstructive pulmonary disease in primary care, with clinical effectiveness and cost-effectiveness analyses and an economic model of a routine screening programme. Work package 2: to recruit a primary care chronic obstructive pulmonary disease cohort, develop a prognostic model [Birmingham Lung Improvement StudieS (BLISS)] to predict risk of respiratory hospital admissions, validate an existing model to predict mortality risk, address some uncertainties about natural history and explore the potential for a home exercise intervention. Work package 3: to identify which factors are associated with employment, absenteeism, presenteeism (working while unwell) and evaluate the feasibility of offering formal occupational health assessment to improve work performance.
Design
Work package 1: a cluster randomised controlled trial with household-level randomised comparison of two alternative case-finding approaches in the intervention arm. Work package 2: cohort study – focus groups. Work package 3: subcohort – feasibility study.
Setting
Primary care settings in West Midlands, UK.
Participants
Work package 1: 74,818 people who have smoked aged 40–79 years without a previous chronic obstructive pulmonary disease diagnosis from 54 general practices. Work package 2: 741 patients with previously diagnosed chronic obstructive pulmonary disease from 71 practices and participants from the work package 1 randomised controlled trial. Twenty-six patients took part in focus groups. Work package 3: occupational subcohort with 248 patients in paid employment at baseline. Thirty-five patients took part in an occupational health intervention feasibility study.
Interventions
Work package 1: targeted case-finding – symptom screening questionnaire, administered opportunistically or additionally by post, followed by diagnostic post-bronchodilator spirometry. The comparator was routine care. Work package 2: twenty-three candidate variables selected from literature and expert reviews. Work package 3: sociodemographic, clinical and occupational characteristics; occupational health assessment and recommendations.
Main outcome measures
Work package 1: yield (screen-detected chronic obstructive pulmonary disease) and cost-effectiveness of case-finding; effectiveness of screening on respiratory hospitalisation and mortality after approximately 4 years. Work package 2: respiratory hospitalisation within 2 years, and barriers to and facilitators of physical activity. Work package 3: work performance – feasibility and acceptability of the occupational health intervention and study processes.
Results
Work package 1: targeted case-finding resulted in greater yield of previously undiagnosed chronic obstructive pulmonary disease than routine care at 1 year [n = 1278 (4%) vs. n = 337 (1%), respectively; adjusted odds ratio 7.45, 95% confidence interval 4.80 to 11.55], and a model-based estimate of a regular screening programme suggested an incremental cost-effectiveness ratio of £16,596 per additional quality-adjusted life-year gained. However, long-term follow-up of the trial showed that at ≈4 years there was no clear evidence that case-finding, compared with routine practice, was effective in reducing respiratory admissions (adjusted hazard ratio 1.04, 95% confidence interval 0.73 to1.47) or mortality (hazard ratio 1.15, 95% confidence interval 0.82 to 1.61). Work package 2: 2305 patients, comprising 1564 with previously diagnosed chronic obstructive pulmonary disease and 741 work package 1 participants (330 with and 411 without obstruction), were recruited. The BLISS prognostic model among cohort participants with confirmed airflow obstruction (n = 1894) included 6 of 23 candidate variables (i.e. age, Chronic Obstructive Pulmonary Disease Assessment Test score, 12-month respiratory admissions, body mass index, diabetes and forced expiratory volume in 1 second percentage predicted). After internal validation and adjustment (uniform shrinkage factor 0.87, 95% confidence interval 0.72 to 1.02), the model discriminated well in predicting 2-year respiratory hospital admissions (c-statistic 0.75, 95% confidence interval 0.72 to 0.79). In focus groups, physical activity engagement was related to self-efficacy and symptom severity. Work package 3: in the occupational subcohort, increasing dyspnoea and exposure to inhaled irritants were associated with lower work productivity at baseline. Longitudinally, increasing exacerbations and worsening symptoms, but not a decline in airflow obstruction, were associated with absenteeism and presenteeism. The acceptability of the occupational health intervention was low, leading to low uptake and low implementation of recommendations and making a full trial unfeasible.
Limitations
Work package 1: even with the most intensive approach, only 38% of patients responded to the case-finding invitation. Management of case-found patients with chronic obstructive pulmonary disease in primary care was generally poor, limiting interpretation of the long-term effectiveness of case-finding on clinical outcomes. Work package 2: the components of the BLISS model may not always be routinely available and calculation of the score requires a computerised system. Work package 3: relatively few cohort participants were in paid employment at baseline, limiting the interpretation of predictors of lower work productivity.
Conclusions
This programme has addressed some of the major uncertainties around screening for undiagnosed chronic obstructive pulmonary disease and has resulted in the development of a novel, accurate model for predicting respiratory hospitalisation in people with chronic obstructive pulmonary disease and the inception of a primary care chronic obstructive pulmonary disease cohort for longer-term follow-up. We have also identified factors that may affect work productivity in people with chronic obstructive pulmonary disease as potential targets for future intervention.
Future work
We plan to obtain data for longer-term follow-up of trial participants at 10 years. The BLISS model needs to be externally validated. Our primary care chronic obstructive pulmonary disease cohort is a unique resource for addressing further questions to better understand the prognosis of chronic obstructive pulmonary disease.
Trial registration
Current Controlled Trials ISRCTN14930255.
Funding
This project was funded by the National Institute for Health Research (NIHR) Programme Grants for Applied Research programme and will be published in full in Programme Grants for Applied Research; Vol. 9, No. 13. See the NIHR Journals Library website for further project information.
Collapse
Affiliation(s)
- Peymané Adab
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Rachel E Jordan
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - David Fitzmaurice
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Jon G Ayres
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - KK Cheng
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Brendan G Cooper
- Lung Function and Sleep, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Amanda Daley
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Andrew Dickens
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Alexandra Enocson
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Sheila Greenfield
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Shamil Haroon
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Kate Jolly
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Sue Jowett
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Tosin Lambe
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - James Martin
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Martin R Miller
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Kiran Rai
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Richard D Riley
- Centre for Prognosis Research, Research Institute for Primary Care and Health Sciences, Keele University, Keele, UK
| | - Steve Sadhra
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Alice Sitch
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | | | - Robert A Stockley
- Respiratory Medicine, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Alice Turner
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
- Respiratory Medicine, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| |
Collapse
|
6
|
Pan Z, Dickens AP, Chi C, Kong X, Enocson A, G Cooper B, Adab P, Cheng KK, Sitch AJ, Jowett S, Adams R, Correia-de-Sousa J, Farley A, Gale NK, Jolly K, Maglakelidze M, Maglakelidze T, M Martins S, Stavrikj K, Stelmach R, Turner AM, Williams S, E Jordan R. Accuracy and cost-effectiveness of different screening strategies for identifying undiagnosed COPD among primary care patients (≥40 years) in China: a cross-sectional screening test accuracy study: findings from the Breathe Well group. BMJ Open 2021; 11:e051811. [PMID: 34556515 PMCID: PMC8461701 DOI: 10.1136/bmjopen-2021-051811] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVES To examine the accuracy and cost-effectiveness of various chronic obstructive pulmonary disease (COPD) screening tests and combinations within a Chinese primary care population. DESIGN Screening test accuracy study. SETTING Urban and rural community health centres in four municipalities of China: Beijing (north), Chengdu (southwest), Guangzhou (south) and Shenyang (northeast). PARTICIPANTS Community residents aged 40 years and above who attended community health centres for any reason were invited to participate. 2445 participants (mean age 59.8 (SD 9.6) years, 39.1% (n=956) male) completed the study (February-December 2019), 68.9% (n=1684) were never-smokers and 3.6% (n=88) had an existing COPD diagnosis. 13.7% (n=333) of participants had spirometry-confirmed airflow obstruction. INTERVENTIONS Participants completed six index tests (screening questionnaires (COPD Diagnostic Questionnaire, COPD Assessment in Primary Care To Identify Undiagnosed Respiratory Disease and Exacerbation Risk (CAPTURE), Chinese Symptom-Based Questionnaire (C-SBQ), COPD-SQ), microspirometry (COPD-6), peak flow (model of peak flow meters used in the study (USPE)) and the reference test (ndd Easy On-PC). PRIMARY AND SECONDARY OUTCOMES Cases were defined as those with forced expiratory volume in one second (FEV1)/forced vital capacity (FVC) below the lower limit of normal (LLN-GLI) on the reference test. Performance of individual screening tests and their combinations was evaluated, with cost-effectiveness analyses providing cost per additional true case detected. RESULTS Airflow measurement devices (sensitivities 64.9% (95% CI 59.5% to 70.0%) and 67.3% (95% CI 61.9% to 72.3%), specificities 89.7% (95% CI 88.4% to 91.0%) and 82.6% (95% CI 80.9% to 84.2%) for microspirometry and peak flow, respectively) generally performed better than questionnaires, the most accurate of which was C-SBQ (sensitivity 63.1% (95% CI 57.6% to 68.3%) specificity 74.2% (95% CI 72.3% to 76.1%)). The combination of C-SBQ and microspirometry used in parallel maximised sensitivity (81.4%) (95% CI 76.8% to 85.4%) and had specificity of 68.0% (95% CI 66.0% to 70.0%), with an incremental cost-effectiveness ratio of £64.20 (CNY385) per additional case detected compared with peak flow. CONCLUSIONS Simple screening tests to identify undiagnosed COPD within the primary care setting in China is possible, and a combination of C-SBQ and microspirometry is the most sensitive and cost-effective. Further work is required to explore optimal cut-points and effectiveness of programme implementation. TRIAL REGISTRATION NUMBER ISRCTN13357135.
Collapse
Affiliation(s)
- Zihan Pan
- General Practice Department, Peking University First Hospital, Beijing, People's Republic of China
- Pulmonary and Critical Care Medicine, Peking University Third Hospital, Beijing, People's Republic of China
| | - Andrew P Dickens
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Chunhua Chi
- General Practice Department, Peking University First Hospital, Beijing, People's Republic of China
| | - Xia Kong
- General Practice Department, Peking University First Hospital, Beijing, People's Republic of China
| | - Alexandra Enocson
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Brendan G Cooper
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
- Lung Investigation Unit, University Hospitals Birmingham NHS Foundation Trust, Queen Elizabeth Hospital Birmingham, Birmingham, UK
| | - Peymané Adab
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Kar Keung Cheng
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
- General Practice Development and Research Centre, Peking University Health Science Centre, Beijing, People's Republic of China
| | - Alice J Sitch
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
- NIHR Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, UK
| | - Sue Jowett
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Rachel Adams
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Jaime Correia-de-Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- International Primary Care Respiratory Group, London, UK
- ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Amanda Farley
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Nicola K Gale
- Health Services Management Centre,School of Social Policy, College of Social Sciences, University of Birmingham, Birmingham, UK
| | - Kate Jolly
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Mariam Maglakelidze
- Georgian Respiratory Association, Georgia
- Petre Shotadze Tbilisi Medical Academy, Georgia
| | | | | | - Katarina Stavrikj
- Center for Family Medicine, Faculty of Medicine, Ss.Cyril and Methodius University in Skopje, North Macedonia
| | - Rafael Stelmach
- Pulmonary Division, Heart Institute (InCor), Hospital das Clinicas da Faculdade de Medicina da, Uinversidade de Sao Paulo, Sao Paulo, Brazil
| | - Alice M Turner
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| | - Sian Williams
- International Primary Care Respiratory Group, London, UK
| | - Rachel E Jordan
- Institute of Applied Health Research, University of Birmingham, Birmingham, West Midlands, UK
| |
Collapse
|
7
|
Chen S, Li X, Wang Z, Zhou Y, Zhao D, Zhao Z, Liu S, Ran P. Validity of the Handheld Expiratory Flowmeter for COPD Screening in the Primary Care Setting of China. Int J Chron Obstruct Pulmon Dis 2021; 16:2039-2047. [PMID: 34267511 PMCID: PMC8275149 DOI: 10.2147/copd.s312190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/19/2021] [Indexed: 11/23/2022] Open
Abstract
Purpose The use of simple and affordable screening tools for chronic obstructive pulmonary disease (COPD) is limited. We aimed to assess the validity of a handheld expiratory flowmeter (Vitalograph Ltd., COPD-6®, Ireland) for COPD screening in Chinese primary care settings. Methods In our cross-sectional study, subjects were randomly selected in eight primary care settings. Tests with the handheld expiratory flowmeter and the conventional spirometry were sequentially performed on all participants. The correlation between the handheld expiratory flowmeter and the conventional spirometry was determined. Validity was determined by the area under the receiver operator characteristic curve (AUC) of the forced expiratory volume in one second (FEV1)/forced expiratory volume in six seconds (FEV6) that used to detect airway obstruction. The sensitivity, specificity, predictive values, and likelihood ratio were calculated according to different FEV1/FEV6 cut-off points. Results A total of 229 subjects (15.4%) were diagnosed with airflow limitation by conventional spirometry. FEV1, FEV6, and FEV1/FEV6 measured by the handheld expiratory flowmeter were correlated with FEV1, FVC, and FEV1/FVC measured by the conventional spirometry (r=0.889, 0.835 and 0.647, p<0.001), respectively. AUC of the FEV1/FEV6 to determine airflow obstruction was 0.857 (95% CI: 0.826 to 0.888). No significant difference of AUC was observed between the symptomatic group and the asymptomatic group (AUC=0.869 vs 0.843, P=0.425). A similar phenomenon was found in the AUC of smokers and never-smokers (AUC=0.862 vs 0.840; P=0.515). The cut-off point for FEV1/FEV6 was 0.77 and the corresponding sensitivity and specificity were 71.2% and 89.8%, respectively. Conclusion The handheld expiratory flowmeter might be used as a screening device for COPD in Chinese primary care settings.
Collapse
Affiliation(s)
- Shuyun Chen
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China.,Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, People's Republic of China
| | - Xiaochen Li
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China.,The People's Hospital of Hubei Province, Wuhan, Hubei Province, People's Republic of China
| | - Zihui Wang
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Yumin Zhou
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Dongxing Zhao
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Zhuxiang Zhao
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China.,The First People's Hospital of Guangzhou City, Guangzhou, Guangdong Province, People's Republic of China
| | - Sha Liu
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| | - Pixin Ran
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Diseases, National Clinical Research Center for Respiratory Disease Guangzhou, First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, Guangdong Province, People's Republic of China
| |
Collapse
|
8
|
Schnieders E, Ünal E, Winkler V, Dambach P, Louis VR, Horstick O, Neuhann F, Deckert A. Performance of alternative COPD case-finding tools: a systematic review and meta-analysis. Eur Respir Rev 2021; 30:30/160/200350. [PMID: 34039672 DOI: 10.1183/16000617.0350-2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/20/2021] [Indexed: 11/05/2022] Open
Abstract
RATIONALE Guidelines recommend pre-/post-bronchodilator spirometry for diagnosing COPD, but resource constraints limit the availability of spirometry in primary care in low- and middle-income countries. Although spirometry is the diagnostic gold standard, we shall assess alternative tools for settings without spirometry. METHODS A systematic literature review and meta-analysis was conducted, utilising Cochrane, CINAHL, Google Scholar, PubMed and Web of Science (search cut-off was May 01, 2020). Published studies comparing the accuracy of diagnostic tools for COPD with post-bronchodilator spirometry were considered. Studies without sensitivity/specificity data, without a separate validation sample and outside of primary care were excluded. Sensitivity, specificity and area under the curve (AUC) were assessed. RESULTS Of 7578 studies, 24 were included (14 635 participants). Hand devices yielded a larger AUC than questionnaires. The meta-analysis included 17 studies and the overall AUC of micro-spirometers (0.84, 95% CI 0.80-0.89) was larger when compared to the COPD population screener (COPD-PS) questionnaire (0.77, 95% CI 0.63-0.85) and the COPD diagnostic questionnaire (CDQ) (0.72, 95% CI 0.64-0.78). However, only the difference between micro-spirometers and the CDQ was significant. CONCLUSIONS The CDQ and the COPD-PS questionnaire were approximately equally accurate tools. Questionnaires ensured testing of symptomatic patients, but micro-spirometers were more accurate. A combination could increase accuracy but was not evaluated in the meta-analysis.
Collapse
Affiliation(s)
- Elena Schnieders
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany
| | - Elyesa Ünal
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany
| | - Volker Winkler
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany
| | - Peter Dambach
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany
| | - Valérie R Louis
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany
| | - Olaf Horstick
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany
| | - Florian Neuhann
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany.,School of Medicine and Clinical Sciences, Levy Mwanawasa Medical University, Lusaka, Zambia
| | - Andreas Deckert
- Research to Practice Group, HIGH - Heidelberg Institute of Global Health, University Hospital Heidelberg, Heidelberg, Germany
| |
Collapse
|
9
|
Novel App-Based Portable Spirometer for the Early Detection of COPD. Diagnostics (Basel) 2021; 11:diagnostics11050785. [PMID: 33925463 PMCID: PMC8146797 DOI: 10.3390/diagnostics11050785] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 11/16/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is preventable and treatable. However, many patients remain undiagnosed and untreated due to the underutilization or unavailability of spirometers. Accordingly, we used Spirobank Smart, an app-based spirometer, for facilitating the early detection of COPD in outpatient clinics. This prospective study recruited individuals who were at risk of COPD (i.e., with age of ≥40 years, ≥10 pack-years of smoking, and at least one respiratory symptoms) but had no previous COPD diagnosis. Eligible participants were examined with Spirobank Smart and then underwent confirmatory spirometry (performed using a diagnostic spirometer), regardless of their Spirobank Smart test results. COPD was defined and confirmed using the postbronchodilator forced expiratory volume in 1 s/forced vital capacity values of <0.70 as measured by confirmatory spirometry. A total of 767 participants were enrolled and examined using Spirobank Smart; 370 participants (94.3% men, mean age of 60.9 years and mean 42.6 pack-years of smoking) underwent confirmatory spirometry. Confirmatory spirometry identified COPD in 103 participants (27.8%). At the optimal cutoff point of 0.74 that was determined using Spirobank Smart for COPD diagnosis, the area under the receiver operating characteristic was 0.903 (95% confidence interval (CI) = 0.860-0.947). Multivariate logistic regression revealed that participants who have an FEV1/FVC ratio of <74% that was determined using Spirobank Smart (odds ratio (OR) = 58.58, 95% CI = 27.29-125.75) and old age (OR = 3.23, 95% CI = 1.04-10.07 for 60 ≤ age < 65; OR = 5.82, 95% CI = 2.22-15.27 for age ≥ 65) had a higher risk of COPD. The Spirobank Smart is a simple and adequate tool for early COPD detection in outpatient clinics. Early diagnosis and appropriate therapy based on GOLD guidelines can positively influence respiratory symptoms and quality of life.
Collapse
|
10
|
Pan Z, Dickens AP, Chi C, Kong X, Enocson A, Adab P, Cheng KK, Sitch AJ, Jowett S, Jordan R. Study to evaluate the effectiveness and cost-effectiveness of different screening strategies for identifying undiagnosed COPD among residents (≥40 years) in four cities in China: protocol for a multicentre cross-sectional study on behalf of the Breathe Well group. BMJ Open 2020; 10:e035738. [PMID: 33247005 PMCID: PMC7703419 DOI: 10.1136/bmjopen-2019-035738] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 03/14/2020] [Accepted: 05/27/2020] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION The latest chronic obstructive pulmonary disease (COPD) epidemiology survey in China estimated that there were 99 million potential COPD patients in the country, the majority of whom are undiagnosed. Screening for COPD in primary care settings is of vital importance for China, but it is not known which strategy would be the most suitable for adoption in primary care. Studies have been conducted to test the accuracy of questionnaires, expiratory peak flow meters and microspirometers to screen for COPD, but no study has directly evaluated and compared the effectiveness and cost-effectiveness of these methods in the Chinese setting. METHODS AND ANALYSIS We present the protocol for a multicentre cross-sectional study, to be conducted in eight community hospitals from four cities among Chinese adults aged 40 years or older to investigate the effectiveness and cost-effectiveness of different case-finding methods for COPD, and determine the test performance of individual and combinations of screening tests and strategies in comparison with quality diagnostic spirometry. Index tests are screening questionnaires (COPD Diagnostic Questionnaire (CDQ), COPD Assessment in Primary Care To Identify Undiagnosed Respiratory Disease and Exacerbation Risk Questionnaire (CAPTURE), symptom-based questionnaire, COPD Screening Questionnaire (COPD-SQ)), microspirometer and peak flow. Each participant will complete all of these tests in one assessment. The primary analysis will compare the performance of a screening questionnaire with a handheld device. Secondary analyses will include the comparative performance of each index test, as well as a comparison of strategies where we use a screening questionnaire and a handheld device. Approximately 2000 participants will be recruited over 9 to 12 months. ETHICS AND DISSEMINATION The study has been approved by Peking University Hospital and University of Birmingham. All study participants will provide written informed consent. Study results will be published in appropriate journal and presented at national and international conferences, as well as relevant social media and various community/stakeholder engagement activities. TRIAL REGISTRATION NUMBER ISRCTN13357135.
Collapse
Affiliation(s)
- Zihan Pan
- Department of General Practice, Peking University First Hospital, Beijing, China
- Department of Pulmonary and Critical Care Medicine, Peking University Third Hospital, Beijing, China
| | - Andrew P Dickens
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Chunhua Chi
- Department of General Practice, Peking University First Hospital, Beijing, China
| | - Xia Kong
- Department of General Practice, Peking University First Hospital, Beijing, China
| | - Alexandra Enocson
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Peymane Adab
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Kar Keung Cheng
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
- General Practice Development and Research Centre, Peking University Health Science Centre, Beijing, China
| | - Alice J Sitch
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Sue Jowett
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| | - Rachel Jordan
- Institute of Applied Health Research, University of Birmingham, Birmingham, UK
| |
Collapse
|
11
|
Alcázar-Navarrete B, Echave-Sustaeta JM. Microspirometers in the Follow-Up of COPD: Advantages and Disadvantages. Arch Bronconeumol 2020; 57:160-161. [PMID: 32798006 DOI: 10.1016/j.arbres.2020.06.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 11/16/2022]
Affiliation(s)
- Bernardino Alcázar-Navarrete
- Hospital de Alta Resolución de Loja, Agencia Sanitaria Hospital de Poniente, Loja, Granada, España; Centro de Investigación Biomédica en Red de Enfermedades Respiratorias (CIBERES), Instituto de Salud Carlos III, Madrid, España.
| | - Jose María Echave-Sustaeta
- Hospital Universitario Quirónsalud Madrid, Madrid, España; Universidad Europea de Madrid, Villaviciosa de Odón, Madrid, España
| |
Collapse
|