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Zou M, Bhatia A, Dong H, Jayaprakash P, Guo J, Sahu D, Hou Y, Tsen F, Tong C, O'Brien K, Situ AJ, Schmidt T, Chen M, Ying Q, Ulmer TS, Woodley DT, Li W. Correction: Evolutionarily conserved dual lysine motif determines the non-chaperone function of secreted Hsp90alpha in tumour progression. Oncogene 2024; 43:1397-1398. [PMID: 38575761 PMCID: PMC11065679 DOI: 10.1038/s41388-024-03017-0] [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: 04/06/2024]
Affiliation(s)
- M Zou
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
- Department of Endocrinology and Metabolism, and Department of Respiratory and Critical Care Medicine, Chronic Airways Diseases Laboratory, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - A Bhatia
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - H Dong
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
- Department of Endocrinology and Metabolism, and Department of Respiratory and Critical Care Medicine, Chronic Airways Diseases Laboratory, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China
| | - P Jayaprakash
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - J Guo
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - D Sahu
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - Y Hou
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - F Tsen
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - C Tong
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research and Department of Cell and Neurobiology, Los Angeles, CA, USA
| | - K O'Brien
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - A J Situ
- Department of Biochemistry and Molecular Biology and Zilkha Neurogenetic Institute University of Southern California Keck Medical Center, Los Angeles, CA, USA
| | - T Schmidt
- Department of Biochemistry and Molecular Biology and Zilkha Neurogenetic Institute University of Southern California Keck Medical Center, Los Angeles, CA, USA
| | - M Chen
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
- Department of Medical Research, Greater Los Angeles Veterans Affairs Heath Care System, Los Angeles, CA, USA
| | - Q Ying
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research and Department of Cell and Neurobiology, Los Angeles, CA, USA
| | - T S Ulmer
- Department of Biochemistry and Molecular Biology and Zilkha Neurogenetic Institute University of Southern California Keck Medical Center, Los Angeles, CA, USA
| | - D T Woodley
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
- Department of Medical Research, Greater Los Angeles Veterans Affairs Heath Care System, Los Angeles, CA, USA
| | - W Li
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA.
- Department of Medical Research, Greater Los Angeles Veterans Affairs Heath Care System, Los Angeles, CA, USA.
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O'Brien K. Unlocking Workplace Brain Health to Fuel Prosperity and Healthy Longevity. Am J Health Promot 2024; 38:580-583. [PMID: 38553418 DOI: 10.1177/08901171241232042b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
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Vadinova V, Sihvonen AJ, Wee F, Garden KL, Ziraldo L, Roxbury T, O'Brien K, Copland DA, McMahon KL, Brownsett SLE. The volume and the distribution of premorbid white matter hyperintensities: Impact on post-stroke aphasia. Hum Brain Mapp 2024; 45:e26568. [PMID: 38224539 PMCID: PMC10789210 DOI: 10.1002/hbm.26568] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 01/17/2024] Open
Abstract
White matter hyperintensities (WMH) are a radiological manifestation of progressive white matter integrity loss. The total volume and distribution of WMH within the corpus callosum have been associated with pathological cognitive ageing processes but have not been considered in relation to post-stroke aphasia outcomes. We investigated the contribution of both the total volume of WMH, and the extent of WMH lesion load in the corpus callosum to the recovery of language after first-ever stroke. Behavioural and neuroimaging data from individuals (N = 37) with a left-hemisphere stroke were included at the early subacute stage of recovery. Spoken language comprehension and production abilities were assessed using word and sentence-level tasks. Neuroimaging data was used to derive stroke lesion variables (volume and lesion load to language critical regions) and WMH variables (WMH volume and lesion load to three callosal segments). WMH volume did not predict variance in language measures, when considered together with stroke lesion and demographic variables. However, WMH lesion load in the forceps minor segment of the corpus callosum explained variance in early subacute comprehension abilities (t = -2.59, p = .01) together with corrected stroke lesion volume and socio-demographic variables. Premorbid WMH lesions in the forceps minor were negatively associated with early subacute language comprehension after aphasic stroke. This negative impact of callosal WMH on language is consistent with converging evidence from pathological ageing suggesting that callosal WMH disrupt the neural networks supporting a range of cognitive functions.
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Affiliation(s)
- Veronika Vadinova
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
- School of Health and Rehabilitation SciencesUniversity of QueenslandBrisbaneAustralia
- Centre of Research Excellence in Aphasia Recovery and RehabilitationLa Trobe UniversityMelbourneAustralia
| | - A. J. Sihvonen
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
- School of Health and Rehabilitation SciencesUniversity of QueenslandBrisbaneAustralia
- Centre of Research Excellence in Aphasia Recovery and RehabilitationLa Trobe UniversityMelbourneAustralia
- Cognitive Brain Research Unit (CBRU)University of HelsinkiHelsinkiFinland
- Centre of Excellence in Music, Mind, Body and BrainUniversity of HelsinkiHelsinkiFinland
| | - F. Wee
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
| | - K. L. Garden
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
- School of Health and Rehabilitation SciencesUniversity of QueenslandBrisbaneAustralia
- Centre of Research Excellence in Aphasia Recovery and RehabilitationLa Trobe UniversityMelbourneAustralia
| | - L. Ziraldo
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
| | - T. Roxbury
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
| | - K. O'Brien
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
| | - D. A. Copland
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
- School of Health and Rehabilitation SciencesUniversity of QueenslandBrisbaneAustralia
- Centre of Research Excellence in Aphasia Recovery and RehabilitationLa Trobe UniversityMelbourneAustralia
| | - K. L. McMahon
- School of Clinical Sciences, Centre for Biomedical TechnologiesQueensland University of TechnologyBrisbaneAustralia
| | - S. L. E. Brownsett
- Queensland Aphasia Research CentreUniversity of QueenslandBrisbaneAustralia
- School of Health and Rehabilitation SciencesUniversity of QueenslandBrisbaneAustralia
- Centre of Research Excellence in Aphasia Recovery and RehabilitationLa Trobe UniversityMelbourneAustralia
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O'Brien K, Ciccarelli B, Reiss A, Stankewicz H, Balakrishnan V. Augmentation of peripheral venous diameter for ultrasound-guided peripheral intravenous line insertion. Am J Emerg Med 2023; 73:75-78. [PMID: 37619446 DOI: 10.1016/j.ajem.2023.08.027] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/12/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
OBJECTIVES Ultrasound-guided intravenous line placement is utilized often in the emergency department for venous access in patients whose veins are difficult to cannulate by traditional methods. This study aims to identify specific interventions that will augment venous cross-sectional area. METHODS Residents and medical students volunteers each had their basilic vein identified using the linear array probe on an ultrasound. The area of the vein was measured with no intervention with the arm positioned parallel to the floor as well as approximately 45 degrees below the level of the bed. These two positions were repeated with the following interventions: one standard rubber tourniquet applied proximal to the vein measurement, an additional rubber tourniquet applied proximal to first tourniquet, blood pressure cuff inflated to between 160 and 200 mmHg applied proximal to the vein, CAT battle tourniquet application proximal to measurement site, and soaked warm towel applied to brachium for up to one minute. The primary outcome was to evaluate the increase in venous cross-sectional area from the baseline measurement after the interventions. RESULTS We had 41 participants in this study. All interventions were statistically significant in increasing venous cross-sectional area as compared to no intervention, with the most significant augmentation being from the CAT battle tourniquet (mean change +7.32 mm2, 95% CI, 5.73-8.91 mm2) . The change in position of the arm, was not statistically significant for any intervention except for the CAT tourniquet (mean change -1.74 mm2, 95% CI, -0.54 to -2.93 mm2). There was no significant difference between two tourniquets and blood pressure cuff (mean change +0.58 mm2, 95% CI, -1.13 to +2.29 mm2), but there was a significant increase in cross-sectional area with CAT tourniquet use compared to blood pressure cuff (mean change +1.62 mm2, 95% CI, 0.29-2.95 mm2). Lastly, two tourniquets increased cross- sectional area compared to one tourniquet (mean change +2.20 mm2, 95% CI, 1.14 - +3.26 mm2). CONCLUSIONS This study identified several potential interventions for maximizing venous cross-sectional area on ultrasound. All the tested interventions resulted in statistically significant increases in cross-sectional area. Arm positioning did not show significant changes in most interventions, with the exception of the CAT tourniquet. Further studies should be performed on how these maneuvers affect success in ultrasound-guided intravenous line placement.
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Affiliation(s)
- Kelly O'Brien
- St. Luke's University Health Network, 801 Ostrum St, Bethlehem, PA 18015, United States of America.
| | - Benjamin Ciccarelli
- St. Luke's University Health Network, 801 Ostrum St, Bethlehem, PA 18015, United States of America
| | - Adam Reiss
- St. Luke's University Health Network, 801 Ostrum St, Bethlehem, PA 18015, United States of America
| | - Holly Stankewicz
- St. Luke's University Health Network, 801 Ostrum St, Bethlehem, PA 18015, United States of America
| | - Vamsi Balakrishnan
- St. Luke's University Health Network, 801 Ostrum St, Bethlehem, PA 18015, United States of America
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Gutman JA, Winters A, Kent A, Amaya M, McMahon C, Smith C, Jordan CT, Stevens B, Minhajuddin M, Pei S, Schowinsky J, Tobin J, O'Brien K, Falco A, Taylor E, Brecl C, Zhou K, Ho P, Sohalski C, Dell-Martin J, Ondracek O, Abbott D, Pollyea DA. Higher-dose venetoclax with measurable residual disease-guided azacitidine discontinuation in newly diagnosed acute myeloid leukemia. Haematologica 2023; 108:2616-2625. [PMID: 37051756 PMCID: PMC10542846 DOI: 10.3324/haematol.2023.282681] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 04/06/2023] [Indexed: 04/14/2023] Open
Abstract
Venetoclax+azacitidine is the standard of care for newly-diagnosed patients with acute myeloid leukemia (AML) for whom intensive chemotherapy is inappropriate. Efforts to optimize this regimen are necessary. We designed a clinical trial to investigate two hypotheses: i) higher doses of venetoclax are tolerable and more effective, and ii) azacitidine can be discontinued after deep remissions. Forty-two newly diagnosed AML patients were enrolled in the investigator-initiated High Dose Discontinuation Azacitidine+Venetoclax (HiDDAV) Study (clinicaltrials gov. Identifier: NCT03466294). Patients received one to three "induction" cycles of venetoclax 600 mg daily with azacitidine. Responders received MRD-positive or MRDnegative "maintenance" arms: azacitidine with 400 mg venetoclax or 400 mg venetoclax alone, respectively. The toxicity profile of HiDDAV was similar to 400 mg venetoclax. The overall response rate was 66.7%; the duration of response (DOR), event-free survival (EFS) and overall survival were 12.9, 7.8 and 9.8 months, respectively. The MRD negativity rate was 64.3% by flow cytometry and 25.0% when also measured by droplet digital polymerase chain recation. MRD-negative patients by flow cytometry had improved DOR and EFS; more stringent measures of MRD negativity were not associated with improved OS, DOR or EFS. Using MRD to guide azacitidine discontinuation did not lead to improved DOR, EFS or OS compared to patients who discontinued azacitidine without MRD guidance. Within the context of this study design, venetoclax doses >400 mg with azacitidine were well tolerated but not associated with discernible clinical improvement, and MRD may not assist in recommendations to discontinue azacitidine. Other strategies to optimize, and for some patients, de-intensify, venetoclax+azacitidine regimens are needed.
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Affiliation(s)
- Jonathan A Gutman
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Amanda Winters
- Center for Cancer and Blood Disorders, Department of Pediatrics, University of Colorado, Aurora CO
| | - Andrew Kent
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Maria Amaya
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Christine McMahon
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Clayton Smith
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Craig T Jordan
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Brett Stevens
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Mohammad Minhajuddin
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Shanshan Pei
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | | | - Jennifer Tobin
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Kelly O'Brien
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Angela Falco
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Elizabeth Taylor
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Constance Brecl
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Katie Zhou
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Phuong Ho
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Connor Sohalski
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Jessica Dell-Martin
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Olivia Ondracek
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO
| | - Diana Abbott
- Center for Innovative Design and Analysis, Department of Biostatistics and Informatics, University of Colorado, Aurora CO
| | - Daniel A Pollyea
- Division of Hematology, Department of Medicine, University of Colorado, Aurora CO.
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Mattke S, Batie D, Chodosh J, Felten K, Flaherty E, Fowler NR, Kobylarz FA, O'Brien K, Paulsen R, Pohnert A, Possin KL, Sadak T, Ty D, Walsh A, Zissimopoulos JM. Expanding the use of brief cognitive assessments to detect suspected early-stage cognitive impairment in primary care. Alzheimers Dement 2023; 19:4252-4259. [PMID: 37073874 DOI: 10.1002/alz.13051] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/24/2023] [Accepted: 01/25/2023] [Indexed: 04/20/2023]
Abstract
INTRODUCTION Mild cognitive impairment remains substantially underdiagnosed, especially in disadvantaged populations. Failure to diagnose deprives patients and families of the opportunity to treat reversible causes, make necessary life and lifestyle changes and receive disease-modifying treatments if caused by Alzheimer's disease. Primary care, as the entry point for most, plays a critical role in improving detection rates. METHODS We convened a Work Group of national experts to develop consensus recommendations for policymakers and third-party payers on ways to increase the use of brief cognitive assessments (BCAs) in primary care. RESULTS The group recommended three strategies to promote routine use of BCAs: providing primary care clinicians with suitable assessment tools; integrating BCAs into routine workflows; and crafting payment policies to encourage adoption of BCAs. DISSCUSSION Sweeping changes and actions of multiple stakeholders are necessary to improve detection rates of mild cognitive impairment so that patients and families may benefit from timely interventions.
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Affiliation(s)
- Soeren Mattke
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Center for Improving Chronic Illness Care, University of Southern California, Los Angeles, California, USA
| | - Donnie Batie
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Baton Rouge General Medical Center, Baton Rouge, Louisiana, USA
| | - Joshua Chodosh
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Division of Geriatric Medicine and Palliative Care, Department of Medicine, New York University School of Medicine, New York, New York, USA
- NYU School of Medicine, New York Harbor VA Healthcare System, New York, New York, USA
| | - Kristen Felten
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Wisconsin Department of Health Services, Office on Aging, Madison, Wisconsin, USA
| | - Ellen Flaherty
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Geisel School of Medicine, Dartmouth College, Lebanon, New Hampshire, USA
- Dartmouth Centers for Health and Aging, Geisel School of Medicine, Lebanon, New Hampshire, USA
| | - Nicole R Fowler
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Indiana University Center for Aging Research, Indiana University School of Medicine and the Regenstrief Institute, Indianapolis, Indiana, USA
- Division of General Internal Medicine and Geriatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
- Center for Health Innovation and Implementation Science, Indiana University, Indianapolis, Indiana, USA
| | - Fred A Kobylarz
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Department of Family Medicine and Community Health, Robert Wood Johnson Medical School, Rutgers Biomedical and Health Sciences, New Brunswick, New Jersey, USA
| | - Kelly O'Brien
- UsAgainstAlzheimer's, Washington, District of Columbia, USA
| | - Russ Paulsen
- UsAgainstAlzheimer's, Washington, District of Columbia, USA
| | - Anne Pohnert
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- CVS Health MinuteClinic, Woonsocket, Rhode Island, USA
| | - Katherine L Possin
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Department of Neurology, University of California, San Francisco Memory and Aging Center, San Francisco, California, USA
| | - Tatiana Sadak
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- University of Washington School of Nursing, Seattle, Washington, USA
| | - Diane Ty
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Alliance to Improve Dementia Care, Milken Institute Center for the Future of Aging, Washington, District of Columbia, USA
| | - Amy Walsh
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Age-Friendly Health Systems, Institute for Healthcare Improvement, Boston, Massachusetts, USA
| | - Julie M Zissimopoulos
- Brief Cognitive Assessment Work Group, District of Columbia, USA
- Sol Price School of Public Policy, University of Southern California, Los Angeles, California, USA
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Gore J, Denno B, Omura JD, Baumgart M, McGuire LC, O'Brien K. Promoting Healthy Aging to Reduce the Risk of Dementia: A Public Health Imperative. Generations 2023; 47:1-11. [PMID: 38560360 PMCID: PMC10979652] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Alzheimer's disease and related dementias place an enormous burden on individuals, families, health and long-term care systems, and governmental budgets. As the burden escalates with rising prevalence, attention has increasingly focused on how the risk of developing dementia can be reduced. Evidence indicates there are ways, from a population perspective, to reduce the risk of cognitive decline and possibly dementia, including through healthier lifestyles. It is imperative that the public health community lead the effort to address modifiable risk factors and social determinants of health for dementia and promote healthy aging through public health action.
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Affiliation(s)
- Janelle Gore
- ORISE fellow for the Alzheimer's Disease program at the CDC
| | - Benjamin Denno
- health policy specialist for the Alzheimer's Association
| | | | | | | | - Kelly O'Brien
- Prevention at UsAgainstAlzheimer's in Washington, DC
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McDaid E, Long S, Curtin C, Burke C, O'Brien K, Cogan L, Ahern E, Mello S, O'Connor M. 95 EXPLORING HIP FRACTURE OUTCOMES IN POST-ACUTE REHABILITATION: A MULTI-SITE AUDIT. Age Ageing 2022. [DOI: 10.1093/ageing/afac218.078] [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: 11/13/2022] Open
Abstract
Abstract
Background
In 2020, 28% of all hip fractures in Ireland were discharged to off-site rehabilitation. The annual Irish Hip Fracture Database (IHFD) report captures patient outcomes at the point of acute discharge however patient outcomes at discharge from offsite rehabilitation are unknown.
Methods
A multi-site retrospective audit was completed examining hip fracture outcomes for patients admitted to four post-acute rehabilitation hospitals during 2021, using IHFD HIPE portals as well as local databases. Descriptive statistics including demographics, pre-fracture mobility as well as outcomes measured including acute length of stay, rehabilitation length of stay, discharge destination and independence with mobility on discharge from rehabilitation. A comparison analysis between sites was completed.
Results
A total of 445 patients were admitted post hip fracture to the four rehabilitation hospitals in 2021. Most were female (69%, n=307), mean age 82.5, 49% lived alone and most (55%) had low pre-fracture mobility as measured by New Mobility Score of 0-6. The mean acute length of stay was 11.8 days and rehabilitation stay 37.6 days. Most (90.2% of complete data, n=333) discharged home, 4.5% (n=17) were transferred to hospital, 3.2% (n=12) were newly admitted to nursing home and 1% (n=4) died. Most (82.2% of complete data, n=256) were independently mobile (CAS 6) at discharge from rehabilitation. There was no significant difference in patient profile between sites however there were significant difference in both acute length of stay (median range 8-13days) as well as rehabilitation length of stay (median range 16-39days).
Conclusion
The findings of this audit provide a new perspective on recovery post hip fracture and insight into longer term hip fracture outcomes. It shows that data collection is feasible in off-site rehabilitation units and should be considered for inclusion in the IHFD. Further work could explore the establishment of standards of care in the post-acute phase of hip fracture rehabilitation.
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Affiliation(s)
- E McDaid
- The Royal Hospital Donnybrook , Dublin, Ireland
| | - S Long
- South Infirmary-Victoria University Hospital , Cork, Ireland
| | - C Curtin
- South Infirmary-Victoria University Hospital , Cork, Ireland
| | - C Burke
- Peamount Healthcare , Dublin, Ireland
| | - K O'Brien
- National Orthopaedic Hospital Cappagh , Dublin, Ireland
| | - L Cogan
- The Royal Hospital Donnybrook , Dublin, Ireland
| | - E Ahern
- South Infirmary-Victoria University Hospital , Cork, Ireland
| | - S Mello
- Peamount Healthcare , Dublin, Ireland
| | - M O'Connor
- National Orthopaedic Hospital Cappagh , Dublin, Ireland
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O'Brien K, Petra V, Lal D, Kwai K, McDonald M, Wallace J, Jeanmonod R. Gender-coding in physician job advertisements and sex disparities in medical and surgical fields. Am J Emerg Med 2022; 60:214-216. [PMID: 35840462 DOI: 10.1016/j.ajem.2022.07.005] [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] [Received: 04/09/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 11/15/2022] Open
Affiliation(s)
| | | | - Divya Lal
- St. Luke's University Health Network, USA
| | - Kim Kwai
- St. Luke's University Health Network, USA
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O'Brien K, Petra V, Lal D, Kwai K, McDonald M, Wallace J, Jeanmonod C, Jeanmonod R. Gender coding in job advertisements for academic, non-academic, and leadership positions in emergency medicine. Am J Emerg Med 2022; 55:6-10. [DOI: 10.1016/j.ajem.2022.02.023] [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] [Received: 12/04/2021] [Revised: 02/09/2022] [Accepted: 02/16/2022] [Indexed: 11/30/2022] Open
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Sabbagh MN, Perez A, Holland TM, Boustani M, Peabody SR, Yaffe K, Bruno M, Paulsen R, O'Brien K, Wahid N, Tanzi RE. Primary prevention recommendations to reduce the risk of cognitive decline. Alzheimers Dement 2022; 18:1569-1579. [PMID: 35026040 PMCID: PMC9545398 DOI: 10.1002/alz.12535] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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: 08/17/2021] [Accepted: 10/11/2021] [Indexed: 12/14/2022]
Abstract
Introduction Few resources address steps clinicians can take to help patients reduce their risk of dementia, despite growing recognition that brain health can be optimized and that risk reduction for cognitive decline can be accomplished by lifestyle modifications. Methods To address this gap, UsAgainstAlzheimer's convened a risk reduction workgroup (RRWG) to review existing evidence and develop recommendations for primary care clinicians discussing cognitive decline and risk reduction with their patients. Results The RRWG produced 11 consensus‐based recommendations and implementation strategies across six topics: neurovascular risk management, physical activity, sleep, nutrition, social isolation, and cognitive stimulation. Discussion These recommendations are a first step for clinicians to address brain health with patients and potentially help them prevent cognitive decline. To ensure there is routine care for brain health, proper incentives and policies must be instituted and more education for consumers should be provided.
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Affiliation(s)
- Marwan N Sabbagh
- Barrow Neurological Institute, Dignity Health/St Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Adriana Perez
- Leonard Davis Institute of Health Economics at the University of Pennsylvania School of Nursing, Philadelphia, Pennsylvania, USA
| | | | - Malaz Boustani
- Indiana University Center for Health Innovation and Implementation Science, School of Medicine, Indianapolis, Indiana, USA
| | | | - Kristine Yaffe
- University of California San Francisco, San Francisco, California, USA
| | | | | | - Kelly O'Brien
- UsAgainstAlzheimer's, Washington, District of Columbia, USA
| | - Naila Wahid
- Avalere Health, Washington, District of Columbia, USA
| | - Rudolph E Tanzi
- McCance Center for Brain Health, Massachusetts General Hospital, Boston, MA USA, Boston, Massachusetts, USA
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Perez GA, O'Brien K, Sabbagh M, Bruno M. Clinical Recommendations for Reducing the Risk of Cognitive Decline. Innov Aging 2021. [PMCID: PMC8682728 DOI: 10.1093/geroni/igab046.707] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
As much as 40% of dementia cases can be attributed to modifiable risk factors (Livingston et al., 2020). Much of that risk-reduction can be accomplished by changing behavior in midlife. In light of the emerging evidence that dementia may be preventable, UsAgainstAlzheimer’s convened a workgroup of national experts to develop new recommendations that primary care clinicians and general neurologists can use to initiate primary prevention conversations with their patients about cognitive decline. Few resources address steps that clinicians can take in their routine care to help patients reduce risk. Some relevant resources provide excellent guidance but tend to be more focused on early detection or slowing disease progression rather than primary prevention. The Risk Reduction Workgroup (RRWG) was convened to help address the need for clinicians to know how to discuss cognitive decline with their patients. The workgroup aligned on 11 recommendations for primary care clinicians and general neurologists. In addition the RRWG provide considerations for implementing the recommendations in clinical practice. The recommendations are mindful of social determinants of health, account for cultural differences, and are designed for general accessibility. This effort is part of a broader initiative by UsAgainstAlzheimer’s to address risk-reduction for cognitive decline and early interventions. Under the guidance of a multidisciplinary Provider Leadership Group consisting of representatives from some of the nation's largest health provider serving organizations, three independent workgroups are developing guidance and tools to assist providers in their clinical practice and improve health outcomes for patients at-risk for Alzheimer's and related dementias.
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Affiliation(s)
- G Adriana Perez
- University of Pennsylvania School of Nursing, Phildelphia, Pennsylvania, United States
| | - Kelly O'Brien
- UsAgainstAlzheimer's, Chicago, Illinois, United States
| | - Marwan Sabbagh
- Cleveland Clinic Nevada, Las Vegas, Nevada, United States
| | - Michelle Bruno
- Avalere Health, Washington, District of Columbia, United States
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Kong Kam Wa T, Holmes C, O'Brien K. A case series of paediatric patients with spinal muscular atrophy type I undergoing scoliosis correction surgery. Anaesth Rep 2021; 9:e12138. [PMID: 34870210 DOI: 10.1002/anr3.12138] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2021] [Indexed: 11/08/2022] Open
Abstract
Spinal muscular atrophy is a neuromuscular disorder with degeneration of spinal motor neurons. Type I is a severe variant that was recently shown to be amenable to treatment with the antisense oligonucleotide nusinersen. As a result of increased life expectancy with this treatment, more children with spinal muscular atrophy type I are presenting for spinal correction surgery. In this case series, we present four such patients who underwent spinal surgery at our institution over the course of one year. Pre-operative assessment showed evidence of reduced respiratory function requiring nocturnal non-invasive ventilation in all four patients. A difficult airway was encountered in two of the four patients. Postoperative complications were ubiquitous and included CSF leak, poor wound healing, metal frame exposure, frame instability and wound infection. There were no postoperative respiratory complications and all four children returned to their respiratory baseline postoperatively. All patients underwent successful lumbar puncture and intrathecal nusinersen injection following their spinal surgeries. Given the risk of complications and prolonged recovery following spinal surgery, a detailed family discussion is advisable.
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Affiliation(s)
- T Kong Kam Wa
- Department of Anaesthesiology Children's Health Ireland at Temple Street Dublin Ireland
| | - C Holmes
- Department of Anaesthesiology Children's Health Ireland at Temple Street Dublin Ireland
| | - K O'Brien
- Department of Anaesthesiology Children's Health Ireland at Temple Street Dublin Ireland
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14
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O'Brien D, Hall J, Miró A, O'Brien K, Falaschi M, Jehle R. Reversing a downward trend in threatened peripheral amphibian (Triturus cristatus) populations through interventions combining species, habitat and genetic information. J Nat Conserv 2021. [DOI: 10.1016/j.jnc.2021.126077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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15
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O'Brien K, Petra V, Lal D, Kwai K, McDonald M, Jeanmonod R. 224 Gender Coding in Job Advertisements for Academic, Non-Academic, and Leadership Positions in Emergency Medicine. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.236] [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: 11/28/2022]
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16
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O'Brien K, Petra V, Lal D, Kwai K, McDonald M, Jeanmonod R. 227 Gender Coding in Physician Job Advertisements and Sex Disparities in Medical and Surgical Fields. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.239] [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: 11/29/2022]
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17
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Morvan A, Ramasesh VV, Blok MS, Kreikebaum JM, O'Brien K, Chen L, Mitchell BK, Naik RK, Santiago DI, Siddiqi I. Qutrit Randomized Benchmarking. Phys Rev Lett 2021; 126:210504. [PMID: 34114846 DOI: 10.1103/physrevlett.126.210504] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 04/27/2021] [Indexed: 05/02/2023]
Abstract
Ternary quantum processors offer significant potential computational advantages over conventional qubit technologies, leveraging the encoding and processing of quantum information in qutrits (three-level systems). To evaluate and compare the performance of such emerging quantum hardware it is essential to have robust benchmarking methods suitable for a higher-dimensional Hilbert space. We demonstrate extensions of industry standard randomized benchmarking (RB) protocols, developed and used extensively for qubits, suitable for ternary quantum logic. Using a superconducting five-qutrit processor, we find an average single-qutrit process infidelity of 3.8×10^{-3}. Through interleaved RB, we characterize a few relevant gates, and employ simultaneous RB to fully characterize crosstalk errors. Finally, we apply cycle benchmarking to a two-qutrit CSUM gate and obtain a two-qutrit process fidelity of 0.85. Our results present and demonstrate RB-based tools to characterize the performance of a qutrit processor, and a general approach to diagnose control errors in future qudit hardware.
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Affiliation(s)
- A Morvan
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
- Computational Research Division, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - V V Ramasesh
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
| | - M S Blok
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA
| | - J M Kreikebaum
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - K O'Brien
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - L Chen
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
| | - B K Mitchell
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
| | - R K Naik
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
| | - D I Santiago
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
- Computational Research Division, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - I Siddiqi
- Quantum Nanoelectronics Laboratory, Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
- Computational Research Division, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
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Hall A, O'Brien K, McCrabb S, Kypri K, Brown S, Wilczynska M, Wiggers J, Wyse R, Dalton C, Wolfenden L. Learnings from efforts to synthesise evidence on the COVID-19 incubation period. Public Health 2021; 198:e12-e13. [PMID: 34130808 PMCID: PMC8112467 DOI: 10.1016/j.puhe.2021.05.002] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 05/04/2021] [Indexed: 11/25/2022]
Affiliation(s)
- A Hall
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia; Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia; Hunter Medical Research Institute, New Lambton Heights, NSW, Australia; Hunter New England Population Health, Hunter New England Area Health Service, Newcastle, Australia.
| | - K O'Brien
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia; Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia; Hunter Medical Research Institute, New Lambton Heights, NSW, Australia; Hunter New England Population Health, Hunter New England Area Health Service, Newcastle, Australia
| | - S McCrabb
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia; Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia; Hunter Medical Research Institute, New Lambton Heights, NSW, Australia; Hunter New England Population Health, Hunter New England Area Health Service, Newcastle, Australia
| | - K Kypri
- Centre for Clinical Epidemiology and Biostatistics, School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW Australia
| | - S Brown
- Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia; School of Psychology, The University of Newcastle, Newcastle, NSW Australia
| | - M Wilczynska
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia; Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia
| | - J Wiggers
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia; Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia; Hunter Medical Research Institute, New Lambton Heights, NSW, Australia; Hunter New England Population Health, Hunter New England Area Health Service, Newcastle, Australia
| | - R Wyse
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia; Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia; Hunter Medical Research Institute, New Lambton Heights, NSW, Australia; Hunter New England Population Health, Hunter New England Area Health Service, Newcastle, Australia
| | - C Dalton
- Hunter New England Population Health, Hunter New England Area Health Service, Newcastle, Australia
| | - L Wolfenden
- School of Medicine and Public Health, The University of Newcastle, Newcastle, NSW, Australia; Priority Research Centre for Health Behaviour, The University of Newcastle, Newcastle, NSW, Australia; Hunter Medical Research Institute, New Lambton Heights, NSW, Australia; Hunter New England Population Health, Hunter New England Area Health Service, Newcastle, Australia
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Jacobs J, Li Q, Cheng Z, O'Brien K, Thompson D, Uitto J, Sabbagh Y. 167 INZ-701 prevents ectopic mineralization in an Abcc6 mouse model of pseudoxanthoma elasticum. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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O'Connor M, Céilleachair AÓ, O'Brien K, O'Leary J, Martin C, D'Arcy T, Flannelly G, McRae J, Prendiville W, Ruttle C, White C, Pilkington L, Sharp L. Health-related quality of life in women after colposcopy: results from a longitudinal patient survey. Qual Life Res 2021; 30:2509-2520. [PMID: 33792833 DOI: 10.1007/s11136-021-02831-3] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Information concerning the health-related quality-of-life (HRQoL) consequences of colposcopy is limited, particularly over time. In a longitudinal study, we investigated women's HRQoL at 4, 8 and 12 months post colposcopy and the factors associated with this. METHODS Women attending colposcopy at two large hospitals affiliated with the national screening programme in Ireland were invited to complete questionnaires at 4, 8 and 12 months post colposcopy. HRQoL was measured using the EQ-5D-3L and compared across a range of socio-demographic, clinical and attitudinal variables. A mixed-effects logistic multivariable model was employed to investigate associations between these variables and low HRQoL. RESULTS Of 584 women initially recruited, 429, 343 and 303 completed questionnaires at 4, 8 and 12 months, respectively. The mean overall HRQoL score for the sample across all time points was 0.90 (SD 0.16). Approximately 18% of women experienced low HRQoL at each of the three time points. In multivariable testing, over the entire 12-month follow-up period, non-Irish nationals (OR 8.99, 95% CI 2.35-34.43) and women with high-grade referral cytology (OR 2.78, 95% CI 1.08-7.13) were at higher odds of low HRQoL. Women who were past (OR 0.20, 95% CI 0.07-0.58) or never (OR 0.42, 95% CI 0.16-1.12) smokers were at lower odds of low HRQoL than current smokers. As women's satisfaction with their healthcare increased their odds of experiencing low HRQoL fell (OR per unit increase 0.51, 95% CI 0.34-0.75). CONCLUSIONS Women's HRQoL did not change over the 12 months post colposcopy, but some subgroups of women were at higher risk of experiencing low HRQoL. These subgroups may benefit from additional support.
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Affiliation(s)
- M O'Connor
- School of Public Health, University College Cork, 4th Floor, Western Gateway Building, Western Road, Cork, Ireland.
| | | | - K O'Brien
- National Cancer Registry Ireland, Cork, Ireland
| | - J O'Leary
- Coombe Women and Infants University Hospital, Dublin, Ireland
| | - C Martin
- Coombe Women and Infants University Hospital, Dublin, Ireland
| | - T D'Arcy
- Coombe Women and Infants University Hospital, Dublin, Ireland
| | - G Flannelly
- National Maternity Hospital, Dublin, Ireland
| | - J McRae
- National Cancer Registry Ireland, Cork, Ireland
| | - W Prendiville
- Coombe Women and Infants University Hospital, Dublin, Ireland
| | - C Ruttle
- Coombe Women and Infants University Hospital, Dublin, Ireland
| | - C White
- Coombe Women and Infants University Hospital, Dublin, Ireland
| | - L Pilkington
- Coombe Women and Infants University Hospital, Dublin, Ireland
| | - L Sharp
- Population Health Sciences Institute, Newcastle University Centre for Cancer, Newcastle University, Newcastle upon Tyne, England
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Abstract
Acute myeloid leukemia (AML) is the most common acute leukemia in adults, diagnosed in approximately 21,450 individuals annually in the US with nearly 11,000 deaths attributable to this disease (National Cancer Institute, 2020). Acute myeloid leukemia is a disease of the elderly, with the average age of diagnosis being 68 years old (Kouchkovsky & Abdul-Hay, 2016). It is a heterogeneous disease with widely varying presentations but universally carries a poor prognosis in the majority of those affected. Unfortunately, the 5-year overall survival rate remains poor, at less than 5% in patients over 65 years of age (Thein, Ershler, Jemal, Yates, & Baer, 2013). The landscape of AML is beginning to change, however, as new and improved treatments are emerging. Advanced practitioners (APs) are often involved in the care of these complex patients from the time of initial symptoms through diagnosis, treatment, and potentially curative therapy. It is vitally important for APs to understand and be aware of the various presentations, initial management strategies, diagnostic workup, and treatment options for patients with AML, especially in the elderly population, which until recently had few treatment options. This Grand Rounds article highlights the common presenting signs and symptoms of patients with AML in the hospital, including a discussion of the upfront clinical stability issues, oncologic emergencies, diagnostic evaluation, and current treatment options for elderly patients and those with poor performance status.
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22
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Kietrys D, Myezwa H, Galantino ML, Parrott JS, Davis T, Levin T, O'Brien K, Hanass-Hancock J. Functional Limitations and Disability in Persons Living with HIV in South Africa and United States: Similarities and Differences. J Int Assoc Provid AIDS Care 2020; 18:2325958219850558. [PMID: 31109225 PMCID: PMC6748470 DOI: 10.1177/2325958219850558] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Persons living with HIV (PLHIV) may experience disability. We compared disability among
PLHIV in the United States and South Africa and investigated associations with health and
demographic characteristics. Secondary analysis of cross-sectional data using medical
records and questionnaires including the World Health Organization Disability Assessment
Schedule (WHO-DAS) 2.0 12-item version (range: 0-36, with higher scores indicative of more
severe disability). Between-country differences for the presence of disability were
assessed with logistic regression and differences in severity using multiple regression.
Eighty-six percent of US participants reported disability, compared to 51.3% in South
Africa. The mean WHO-DAS score was higher in the United States (12.09 ± 6.96) compared to
South Africa (8.3 ± 6.27). Participants with muscle pain, depression, or more years since
HIV diagnosis were more likely to report disability. Being female or depressed was
associated with more severity. Being adherent to anti-retroviral therapy (ART) and
employed were associated with less severity. Because muscle pain and depression were
predictive factors for disability, treatment of those problems may help mitigate
disability in PLHIV.
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Affiliation(s)
- David Kietrys
- 1 Department of Rehabilitation and Movement Sciences, School of Health Professions, Rutgers - The State University of New Jersey, Blackwood, NJ, USA
| | - Hellen Myezwa
- 2 Department of Physiotherapy, School of Therapeutic Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Mary Lou Galantino
- 2 Department of Physiotherapy, School of Therapeutic Sciences, University of the Witwatersrand, Johannesburg, South Africa.,3 Physical Therapy Program, School of Health Sciences, Stockton University, Galloway, NJ, USA.,4 Clinical Center for Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - James Scott Parrott
- 1 Department of Rehabilitation and Movement Sciences, School of Health Professions, Rutgers - The State University of New Jersey, Blackwood, NJ, USA
| | - Tracy Davis
- 1 Department of Rehabilitation and Movement Sciences, School of Health Professions, Rutgers - The State University of New Jersey, Blackwood, NJ, USA
| | - Todd Levin
- 5 School of Osteopathic Medicine, Rowan University, Stratford, NJ, USA
| | - Kelly O'Brien
- 6 Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada.,7 Institute of Health Policy, Management and Evaluation (IHPME), University of Toronto, Toronto, Ontario, Canada.,8 Rehabilitation Sciences Institute, University of Toronto, Toronto, Ontario, Canada
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Avigan DE, Shah N, Logan B, Zhu J, Bisharat L, Callander NS, Chodon T, Dhakal B, Efebera YA, Geller N, Hematti P, Herman M, Lazarus HM, McKenna DH, Nelson C, Nooka A, O'Brien K, O'Donnell LC, Rapoport AP, Rosenblatt J, Soiffer RJ, Stroopinsky D, Torka P, Uhl L, Waller EK, Wu J(M, Young JW, Pasquini MC, Chung DJ. Evaluation of Tumor Vaccine Generation in a Phase II Multicenter Trial of Single Autologous Hematopoietic Cell Transplant (AutoHCT)Followed By Lenalidomide Maintenance for Multiple Myeloma (MM) with or without Vaccination with Dendritic Cell/ Myeloma Fusions (DC/MM fusion vaccine): Blood and Marrow Transplant Clinical Trials Network (BMT CTN) 1401. Biol Blood Marrow Transplant 2020. [DOI: 10.1016/j.bbmt.2019.12.230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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24
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Gunn C, O'Brien K, Fosså K, Tonkopi E, Lanca L, Martins CT, Muller H, Friedrich-Nel H, Abdolell M, Johansen S. A multi institutional comparison of imaging dose and technique protocols for neonatal chest radiography. Radiography (Lond) 2020; 26:e66-e72. [PMID: 32052771 DOI: 10.1016/j.radi.2019.10.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 05/14/2019] [Revised: 10/28/2019] [Accepted: 10/30/2019] [Indexed: 10/25/2022]
Abstract
INTRODUCTION The focus on paediatric radiation dose reduction supports reevaluation of paediatric imaging protocols. This is particularly important in the neonates where chest radiographs are frequently requested to assess respiratory illness and line placement. This study aims to assess the impact of neonatal chest radiographic protocols on patient dose in four hospitals in different countries. METHODS Exposure parameters, collimation, focus to skin distance (FSD) and radiation dose from 200 neonatal chest radiographs were registered prospectively. Inclusion criteria consisted of both premature and full-term neonates weighing between 1000 and 5000 g. Only data from the examinations meeting diagnostic criteria and approved for the clinical use were included. Radiation dose was assessed using dose area product (DAP). RESULTS The lowest DAP value (4.58 mGy cm2) was recorded in the Norwegian hospital, employing a high kVp, low mAs protocol using a DR system. The Canadian hospital recorded the highest DAP (9.48), using lower kVp and higher mAs with a CR system, including the addition of a lateral projection. The difference in the mean DAP, weight, field of view (FOV) and kVp between the hospitals is statistically significant (p < 0.001). CONCLUSION Use of non-standardised imaging protocols in neonatal chest radiography results in differences in patient dose across hospitals included in the study. Using higher kVp, lower mAs and reducing the number of lateral projections to clinically relevant indications result in a lower DAP measured in the infant sample studied. Further studies to examine image quality based on exposure factors and added filtration are recommended. IMPLICATIONS FOR PRACTICE Reevaluation of paediatric imaging protocols presents an opportunity to reduce patient dose in a population with increased sensitivity to ionising radiation.
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Affiliation(s)
- C Gunn
- School of Health Sciences, Dalhousie University, Halifax, Canada
| | - K O'Brien
- Faculty of Medicine, Dalhousie University, Halifax, Canada; IWK Health Centre, Diagnostic Imaging, Halifax, Canada
| | - K Fosså
- Division of Diagnostics and Intervention, Oslo University Hospital, Rikshospitalet, Norway
| | - E Tonkopi
- Faculty of Medicine, Dalhousie University, Halifax, Canada
| | - L Lanca
- ESTeSL - Escola Superior de Tecnologia da Saude de Lisboa, Instituto Poliecnico de Lisboa, Portugal; Karolinska Institutet, Stockholm, Sweden; Singapore Institute of Technology, Health and Social Sciences Cluster, Singapore
| | - C T Martins
- ESTeSL - Escola Superior de Tecnologia da Saude de Lisboa, Instituto Poliecnico de Lisboa, Portugal; Centro Hospitalar Lisboa Norte, EPE, Hospital de Santa Maria (HSM) Radiology Department, Lisboa, Portugal
| | - H Muller
- Central University of Technology, Free State (CUT), Faculty of Health and Environmental Sciences, South Africa; Department of Clinical Imaging Sciences, Universitas Academic Hospital, Bloemfontein, South Africa
| | - H Friedrich-Nel
- Department of Clinical Imaging Sciences, Universitas Academic Hospital, Bloemfontein, South Africa
| | - M Abdolell
- Faculty of Medicine, Dalhousie University, Halifax, Canada
| | - S Johansen
- Oslo Metropolitan University (OsloMet), Faculty of Health Sciences, Oslo, Norway; Department of Oncology, Division of Cancer Medicine, Oslo University Hospital, Norway.
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Zhu A, Huo R, Malik A, Foroutan F, Rigobon A, Chang D, Liu H, Vargas JD, O'Brien K, Stein M, Ng N, Borgo A, Siemieniuk R, Sekercioglu N, Evaniew N, Ross H, Alba A. PREDICTING MORTALITY AND HOSPITALIZATION IN CHRONIC HEART FAILURE PATIENTS WITH ISCHEMIC CARDIOMYOPATHY. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.509] [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: 10/25/2022] Open
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26
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Buchan T, Ching C, Malik A, Lu Y, Lau K, Foroutan F, Liu H, O'Brien K, Stein M, Rigobon A, Chang D, Vargas JD, Ng N, Borgo A, Siemieniuk R, Sekercioglu N, Evaniew N, Ross H, Alba A. NATRIURETIC PEPTIDES AS PREDICTORS OF MORTALITY IN ADULT AMBULATORY HEART FAILURE PATIENTS: A SYSTEMATIC REVIEW AND META-ANALYSIS. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.431] [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: 10/25/2022] Open
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Lau K, Malik A, Foroutan F, Ching C, Lu Y, Buchan T, Liu H, Kim H, Qiao A, Tan C, Leda M, Wang J, O'Brien K, Stein M, Elmslie C, Rigobon A, Chang D, Vargas JD, Ng N, Borgo A, Siemieniuk R, Sekercioglu N, Evaniew N, Ross H, Alba A. RESTING HEART RATE AS A PREDICTOR OF MORTALITY IN PATIENTS WITH HEART FAILURE. Can J Cardiol 2019. [DOI: 10.1016/j.cjca.2019.07.467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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O'Brien K, SARAVANABAVAN S, Zhang J, Wong A, Luciuk M, Burgess J, Rangan G. SAT-126 PROGRESSION OF RENAL MICROVASCULAR ABNORMALITIES AND THE EFFECT OF SIROLIMUS ON ANGIOGENESIS IN EXPERIMENTAL POLYCYSTIC KIDNEY DISEASE. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.155] [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: 11/28/2022] Open
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O'Brien K, Owen E, Margetts R, Kavaliunaite E, Creedon M. P340 The impact at 5-year follow up of gastrostomy tube placement on spirometry and BMI z-score in children with cystic fibrosis. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30632-0] [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: 10/26/2022]
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Stewart L, Smoak P, Hydock D, Hayward R, O'Brien K, Lisano J, Boeneke C, Christensen M, Mathias A. Milk and kefir maintain aspects of health during doxorubicin treatment in rats. J Dairy Sci 2019; 102:1910-1917. [DOI: 10.3168/jds.2018-15576] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 11/20/2018] [Indexed: 12/24/2022]
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Abstract
Patients with factitious disorder typically present with signs or symptoms suggesting a medical problem, but which transpire to be self-induced or fabricated. Repeated investigations and treatments are often carried out to no avail before this possibility is considered. In this case, a 51-year-old female presented to the oral and maxillofacial surgery unit with toothache and a facial rash. Following admission to hospital a range of investigations were performed, and a tooth was extracted. Judicious attention by nursing staff led to the discovery that the patient had been applying make-up to mimic a skin rash. This concern was raised with the patient and she admitted falsifying the rash. Although this patient may have been experiencing pain, by applying make-up in this manner she sought to exaggerate the severity of her condition and as a result underwent potentially unnecessary procedures. This case provides a reminder that the possibility of factitious disorder should be considered in cases where patients present with symptoms or signs which appear fabricated or self-inflicted, defy anatomical or physiological principles, or do not correlate with the history. Thorough history taking is essential, and access to electronic care records may be informative. Psychiatric follow-up is recommended, but not all patients are willing to engage with this process.
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Affiliation(s)
- S Rice
- Department of Oral & Maxillofacial Surgery, Ulster Hospital, Dundonald, Northern Ireland
| | - K O'Brien
- Department of Oral & Maxillofacial Surgery, Ulster Hospital, Dundonald, Northern Ireland
| | - M Chew
- Department of Old-age Psychiatry, Knockbracken Healthcare Park, Belfast, Northern Ireland
| | - E Qudairat
- Department of Oral & Maxillofacial Surgery, Ulster Hospital, Dundonald, Northern Ireland
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Hamilton-Craig C, Staeb D, O'Brien K, Galloway G, Barth M. 11637-Tesla Cardiac MRI for Ventricular and Valvular quantitation in healthy volunteers. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.1163] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - D Staeb
- University of Queensland, Centre for Advanced Imaging, Brisbane, Australia
| | - K O'Brien
- Siemens Healthineers, Brisbane, Australia
| | - G Galloway
- Translational Research Institute, Brisbane, Australia
| | - M Barth
- University of Queensland, Centre for Advanced Imaging, Brisbane, Australia
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Harris M, Brathwaite R, McGowan CR, Ciccarone D, Gilchrist G, McCusker M, O'Brien K, Dunn J, Scott J, Hope V. 'Care and Prevent': rationale for investigating skin and soft tissue infections and AA amyloidosis among people who inject drugs in London. Harm Reduct J 2018; 15:23. [PMID: 29739408 PMCID: PMC5941602 DOI: 10.1186/s12954-018-0233-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/02/2018] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Skin and soft tissue infections (SSTIs) are a leading cause of morbidity and mortality among people who inject drugs (PWID). International data indicate up to one third of PWID have experienced an SSTI within the past month. Complications include sepsis, endocarditis and amyloid A (AA) amyloidosis. AA amyloidosis is a serious sequela of chronic SSTI among PWID. Though there is a paucity of literature reporting on AA amyloidosis among PWID, what has been published suggests there is likely a causal relationship between AA amyloidosis and injecting-related SSTI. If left untreated, AA amyloidosis can lead to renal failure; premature mortality among diagnosed PWID is high. Early intervention may reverse disease. Despite the high societal and individual burden of SSTI among PWID, empirical evidence on the barriers and facilitators to injecting-related SSTI prevention and care or the feasibility and acceptability of AA amyloidosis screening and treatment referral are limited. This study aims to fill these gaps and assess the prevalence of AA amyloidosis among PWID. METHODS Care and Prevent is a UK National Institute for Health Research-funded mixed-methods study. In five phases (P1-P5), we aim to assess the evidence for AA amyloidosis among PWID (P1); assess the feasibility of AA amyloidosis screening, diagnostic and treatment referral among PWID in London (P2); investigate the barriers and facilitators to AA amyloidosis care (P3); explore SSTI protection and risk (P4); and co-create harm reduction resources with the affected community (P5). This paper describes the conceptual framework, methodological design and proposed analysis for the mixed-methods multi-phase study. RESULTS We are implementing the Care and Prevent protocol in London. The systematic review component of the study has been completed and published. Care and Prevent will generate an estimate of AA amyloidosis prevalence among community recruited PWID in London, with implications for the development of screening recommendations and intervention implementation. We aim to recruit 400 PWID from drug treatment services in London, UK. CONCLUSIONS Care and Prevent is the first study to assess screening feasibility and the prevalence of positive proteinuria, as a marker for AA amyloidosis, among PWID accessing drug treatment services. AA amyloidosis is a serious, yet under-recognised condition for which early intervention is available but not employed.
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Affiliation(s)
- M Harris
- Department of Public Health, Environments, and Society London, School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK.
| | - R Brathwaite
- Department of Public Health, Environments, and Society London, School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK
| | - Catherine R McGowan
- Department of Public Health, Environments, and Society London, School of Hygiene & Tropical Medicine, 15-17 Tavistock Place, London, WC1H 9SH, UK.,Humanitarian Public Health Technical Unit, Save the Children UK, London, UK
| | - D Ciccarone
- Family and Community Medicine, University of California San Francisco, San Franciso, CA, 94143, USA
| | - G Gilchrist
- Institute of Psychiatry, Psychology and Neuroscience, National Addiction Centre, King's College London, 4 Windsor Walk, London, SE5 8BB, UK
| | - M McCusker
- Lambeth Service Users Forum, Lorraine Hewitt House, Brighton Terrace, London, SW9 8DG, UK
| | - K O'Brien
- Camden Drug Services, The Margarete Centre, 108 Hampstead Road, London, NW1 2LS, UK
| | - J Dunn
- Camden Drug Services, The Margarete Centre, 108 Hampstead Road, London, NW1 2LS, UK
| | - J Scott
- Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - V Hope
- Public Health Institute, Liverpool John Moores University, 79 Tithebarn Street, Liverpool, L2 2ER, UK
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Cai Y, Lin JR, Zhang Q, O'Brien K, Montagna C, Zhang ZD. Epigenetic alterations to Polycomb targets precede malignant transition in a mouse model of breast cancer. Sci Rep 2018; 8:5535. [PMID: 29615825 PMCID: PMC5882905 DOI: 10.1038/s41598-018-24005-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 03/26/2018] [Indexed: 12/16/2022] Open
Abstract
Malignant breast cancer remains a major health threat to women of all ages worldwide and epigenetic variations on DNA methylation have been widely reported in cancers of different types. We profiled DNA methylation with ERRBS (Enhanced Reduced Representation Bisulfite Sequencing) across four main stages of tumor progression in the MMTV-PyMT mouse model (hyperplasia, adenoma/mammary intraepithelial neoplasia, early carcinoma and late carcinoma), during which malignant transition occurs. We identified a large number of differentially methylated cytosines (DMCs) in tumors relative to age-matched normal mammary glands from FVB mice. Despite similarities, the methylation differences of the premalignant stages were distinct from the malignant ones. Many differentially methylated loci were preserved from the first to the last stage throughout tumor progression. Genes affected by methylation gains were enriched in Polycomb repressive complex 2 (PRC2) targets, which may present biomarkers for early diagnosis and targets for treatment.
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Affiliation(s)
- Ying Cai
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Jhih-Rong Lin
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Quanwei Zhang
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Kelly O'Brien
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Cristina Montagna
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, USA.,Department of Pathology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Zhengdong D Zhang
- Department of Genetics, Albert Einstein College of Medicine, Bronx, New York, USA.
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Abstract
BACKGROUND Since the advent of antiretrovirals, people with HIV are living longer and have improved quality of life. However, 30-60% of these individuals experience cognitive impairment. Fortunately, physical activity has emerged as a management strategy for cognitive impairment. PURPOSE To map the evidence on physical activity and cognition in HIV. METHODS We searched five databases using terms related to physical activity and HIV. Two authors independently reviewed titles and abstracts for studies that addressed physical activity/exercise and cognition in people with HIV. Authors reviewed full texts to identify articles that met our inclusion criteria. One author extracted the data, then we collated the results and summarized the characteristics of included studies. RESULTS Sixteen studies from high-income countries were included; eight were interventional (five randomized controlled trials and three pre-post single group observational studies) and eight were non-interventional studies. The interventional studies included aerobic, resistive, and Tai Chi exercise for 8 weeks to 12 months in duration. Two of eight interventional studies found exercise to benefit self-reported cognition. All eight non-interventional studies showed a positive relationship between physical activity and cognitive function. CONCLUSIONS Results of this study suggest that physical activity may preserve or improve cognition in people living with HIV. Implications for Rehabilitation Physical activity may play a role in preserving or improving cognition in the human immunodeficiency virus population. Exercise should be prescribed for people with human immunodeficiency virus based on the stage of infection. Rehabilitation professionals should follow current exercise guidelines when prescribing exercise for people living with human immunodeficiency virus.
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Affiliation(s)
- Adria Quigley
- a Department of Health , Dalhousie University , Halifax , NS, Canada
| | - Kelly O'Brien
- b Department of Physical Therapy , University of Toronto , Toronto , Canada.,c Rehabilitation Sciences Institute , University of Toronto , Toronto , Canada.,d Institute of Health Policy , University of Toronto , Toronto , Canada
| | - Robin Parker
- e Evidence Synthesis and Information Services , Dalhousie University , Halifax , Canada.,f Department of Community Health and Epidemiology , Dalhousie University , Halifax , Canada
| | - Marilyn MacKay-Lyons
- g Department of Physiotherapy , Dalhousie University , Halifax , Canada.,h Department of Medicine , Dalhousie University , Halifax , Canada.,i Nova Scotia Health Authority , Halifax , Canada
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36
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Witz C, Doody K, Park J, Seifu Y, O'Brien K, Yankov V, Heiser P. Highly purified human menotropin (HP-HMG) versus recombinant follicle stimulating hormone (RFSH) in high responders undergoing in vitro fertilization (IVF): MEGASET-HR trial outcomes. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.073] [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: 10/18/2022]
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O'Connor M, O'Brien K, Waller J, Gallagher P, D'Arcy T, Flannelly G, Martin CM, McRae J, Prendiville W, Ruttle C, White C, Pilkington L, O'Leary JJ, Sharp L. Physical after-effects of colposcopy and related procedures, and their inter-relationship with psychological distress: a longitudinal survey. BJOG 2017; 124:1402-1410. [PMID: 28374937 DOI: 10.1111/1471-0528.14671] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To estimate prevalence of post-colposcopy physical after-effects and investigate associations between these and subsequent psychological distress. DESIGN Longitudinal survey. SETTING Two hospital-based colposcopy clinics. POPULATION Women with abnormal cytology who underwent colposcopy (±related procedures). METHODS Questionnaires were mailed to women 4, 8 and 12 months post-colposcopy. Details of physical after-effects (pain, bleeding and discharge) experienced post-colposcopy were collected at 4 months. Colposcopy-specific distress was measured using the Process Outcome-Specific Measure at all time-points. Linear mixed-effects regression was used to identify associations between physical after-effects and distress over 12 months, adjusting for socio-demographic and clinical variables. MAIN OUTCOME MEASURES Prevalence of post-colposcopy physical after-effects. Associations between the presence of any physical after-effects, awareness of after-effects, and number of after-effects and distress. RESULTS Five-hundred and eighty-four women were recruited (response rate = 73, 59 and 52% at 4, 8 and 12 months, respectively). Eighty-two percent of women reported one or more physical after-effect(s). Multiple physical after-effects were common (two after-effects = 25%; three after-effects = 25%). Psychological distress scores declined significantly over time. In adjusted analyses, women who experienced all three physical after-effects had on average a 4.58 (95% CI: 1.10-8.05) higher distress scored than those who experienced no after-effects. Women who were unaware of the possibility of experiencing after-effects scored significantly higher for distress during follow-up. CONCLUSIONS The prevalence of physical after-effects of colposcopy and related procedures is high. The novel findings of inter-relationships between awareness of the possibility of after-effects and experiencing multiple after-effects, and post-colposcopy distress may be relevant to the development of interventions to alleviate post-colposcopy distress. TWEETABLE ABSTRACT Experiencing multiple physical after-effects of colposcopy is associated with psychological distress.
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Affiliation(s)
- M O'Connor
- National Cancer Registry Ireland, Cork, Ireland
| | - K O'Brien
- National Cancer Registry Ireland, Cork, Ireland
| | - J Waller
- Department of Behavioural Science and Health, University College London, London, UK
| | - P Gallagher
- School of Nursing and Human Sciences, Dublin City University, Dublin, Ireland
| | - T D'Arcy
- Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - G Flannelly
- National Maternity Hospital, Dublin 2, Ireland
| | - C M Martin
- Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - J McRae
- National Cancer Registry Ireland, Cork, Ireland
| | - W Prendiville
- Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - C Ruttle
- Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - C White
- Trinity College Dublin, Dublin 2, Ireland
| | - L Pilkington
- Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - J J O'Leary
- Coombe Women and Infants University Hospital, Dublin 8, Ireland
| | - L Sharp
- Institute of Health & Society, Newcastle University, Newcastle upon Tyne, UK
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O'Brien K, Boeneke C, Prinyawiwatkul W, Lisano J, Shackelford D, Reeves K, Christensen M, Hayward R, Ordonez KC, Stewart L. Short communication: Sensory analysis of a kefir product designed for active cancer survivors. J Dairy Sci 2017; 100:4349-4353. [DOI: 10.3168/jds.2016-12320] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 02/12/2017] [Indexed: 02/03/2023]
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Affiliation(s)
- K. O'Brien
- Health and Safety Laboratory, New York Operations Office U.S. Atomic Energy Commission, New York, New York
| | - S. Samson
- Health and Safety Laboratory, New York Operations Office U.S. Atomic Energy Commission, New York, New York
| | - R. Sanna
- Health and Safety Laboratory, New York Operations Office U.S. Atomic Energy Commission, New York, New York
| | - J. E. McLaughlin
- Health and Safety Laboratory, New York Operations Office U.S. Atomic Energy Commission, New York, New York
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40
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Nelson C, O'Brien K, Mendizabal A, Gersten I, Uhl L, Chung D, Shah N, Avigan D, Pasquini M. Development and management of a multi-center, center-specific cellular therapy manufacturing approach: The experience of the Blood and Marrow Transplant Clinical Trials Network (BMT CTN) Protocol #1401. Cytotherapy 2017. [DOI: 10.1016/j.jcyt.2017.02.201] [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: 10/19/2022]
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41
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Tsichlaki A, O'Brien K, Johal A, Fleming PS. A scoping review of outcomes related to orthodontic treatment measured in cleft lip and palate. Orthod Craniofac Res 2017; 20:55-64. [DOI: 10.1111/ocr.12152] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/24/2017] [Indexed: 01/21/2023]
Affiliation(s)
- A. Tsichlaki
- Barts and The London School of Medicine and Dentistry; Queen Mary University of London; London UK
| | - K. O'Brien
- School of Dentistry; University of Manchester; Manchester UK
| | - A. Johal
- Barts and The London School of Medicine and Dentistry; Queen Mary University of London; London UK
| | - P. S. Fleming
- Barts and The London School of Medicine and Dentistry; Queen Mary University of London; London UK
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42
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Zou M, Bhatia A, Dong H, Jayaprakash P, Guo J, Sahu D, Hou Y, Tsen F, Tong C, O'Brien K, Situ AJ, Schmidt T, Chen M, Ying Q, Ulmer TS, Woodley DT, Li W. Evolutionarily conserved dual lysine motif determines the non-chaperone function of secreted Hsp90alpha in tumour progression. Oncogene 2017; 36:2160-2171. [PMID: 27721406 PMCID: PMC5386837 DOI: 10.1038/onc.2016.375] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [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: 02/23/2016] [Revised: 08/30/2016] [Accepted: 09/01/2016] [Indexed: 12/16/2022]
Abstract
Both intracellular and extracellular heat shock protein-90 (Hsp90) family proteins (α and β) have been shown to support tumour progression. The tumour-supporting activity of the intracellular Hsp90 is attributed to their N-terminal ATPase-driven chaperone function. What molecular entity determines the extracellular function of secreted Hsp90 and the distinction between Hsp90α and Hsp90β was unclear. Here we demonstrate that CRISPR/Case9 knocking out Hsp90α nullifies tumour cells' ability to migrate, invade and metastasize without affecting the cell survival and growth. Knocking out Hsp90β leads to tumour cell death. Extracellular supplementation with recombinant Hsp90α, but not Hsp90β, protein recovers tumourigenicity of the Hsp90α-knockout cells. Sequential mutagenesis identifies two evolutionarily conserved lysine residues, lys-270 and lys-277, in the Hsp90α subfamily that determine the extracellular Hsp90α function. Hsp90β subfamily lacks the dual lysine motif and the extracellular function. Substitutions of gly-262 and thr-269 in Hsp90β with lysines convert Hsp90β to a Hsp90α-like protein. Newly constructed monoclonal antibody, 1G6-D7, against the dual lysine region of secreted Hsp90α inhibits both de novo tumour formation and expansion of already formed tumours in mice. This study suggests an alternative therapeutic approach to target Hsp90 in cancer, that is, the tumour-secreted Hsp90α, instead of the intracellular Hsp90α and Hsp90β.
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Affiliation(s)
- M Zou
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - A Bhatia
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - H Dong
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - P Jayaprakash
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - J Guo
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - D Sahu
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - Y Hou
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - F Tsen
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - C Tong
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research and Department of Cell and Neurobiology, Los Angeles, CA, USA
| | - K O'Brien
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | - A J Situ
- Department of Biochemistry and Molecular Biology and Zilkha Neurogenetic Institute University of Southern California Keck Medical Center, Los Angeles, CA, USA
| | - T Schmidt
- Department of Biochemistry and Molecular Biology and Zilkha Neurogenetic Institute University of Southern California Keck Medical Center, Los Angeles, CA, USA
| | - M Chen
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
- Department of Medical Research, Greater Los Angeles Veterans Affairs Heath Care System, Los Angeles, CA, USA
| | - Q Ying
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research and Department of Cell and Neurobiology, Los Angeles, CA, USA
| | - T S Ulmer
- Department of Biochemistry and Molecular Biology and Zilkha Neurogenetic Institute University of Southern California Keck Medical Center, Los Angeles, CA, USA
| | - D T Woodley
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
- Department of Medical Research, Greater Los Angeles Veterans Affairs Heath Care System, Los Angeles, CA, USA
| | - W Li
- Department of Dermatology and the Norris Comprehensive Cancer Center, Los Angeles, CA, USA
- Department of Medical Research, Greater Los Angeles Veterans Affairs Heath Care System, Los Angeles, CA, USA
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Schofield T, Foroutan F, Ryoo S, O'Brien K, Alba A, Hussain S, Rao V, Ross H, Billia F. Association of Body Mass Index and Age on Risk of Driveline Infection Post Ventricular Assist Device Implantation. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.692] [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: 11/25/2022] Open
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44
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Cai Y, Nogales-Cadenas R, Zhang Q, Lin JR, Zhang W, O'Brien K, Montagna C, Zhang ZD. Transcriptomic dynamics of breast cancer progression in the MMTV-PyMT mouse model. BMC Genomics 2017; 18:185. [PMID: 28212608 PMCID: PMC5316186 DOI: 10.1186/s12864-017-3563-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 02/07/2017] [Indexed: 11/18/2022] Open
Abstract
Background Malignant breast cancer with complex molecular mechanisms of progression and metastasis remains a leading cause of death in women. To improve diagnosis and drug development, it is critical to identify panels of genes and molecular pathways involved in tumor progression and malignant transition. Using the PyMT mouse, a genetically engineered mouse model that has been widely used to study human breast cancer, we profiled and analyzed gene expression from four distinct stages of tumor progression (hyperplasia, adenoma/MIN, early carcinoma and late carcinoma) during which malignant transition occurs. Results We found remarkable expression similarity among the four stages, meaning genes altered in the later stages showed trace in the beginning of tumor progression. We identified a large number of differentially expressed genes in PyMT samples of all stages compared with normal mammary glands, enriched in cancer-related pathways. Using co-expression networks, we found panels of genes as signature modules with some hub genes that predict metastatic risk. Time-course analysis revealed genes with expression transition when shifting to malignant stages. These may provide additional insight into the molecular mechanisms beyond pathways. Conclusions Thus, in this study, our various analyses with the PyMT mouse model shed new light on transcriptomic dynamics during breast cancer malignant progression. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3563-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ying Cai
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | | | - Quanwei Zhang
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Jhih-Rong Lin
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Wen Zhang
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Kelly O'Brien
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Cristina Montagna
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA.,Department of Pathology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Zhengdong D Zhang
- Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, USA.
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45
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Balfe M, Keohane K, O'Brien K, Sharp L. Social networks, social support and social negativity: A qualitative study of head and neck cancer caregivers' experiences. Eur J Cancer Care (Engl) 2016; 26. [PMID: 28004448 DOI: 10.1111/ecc.12619] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/05/2016] [Indexed: 11/30/2022]
Abstract
Head and neck cancer is a serious form of cancer that can generate substantial physical and psychosocial morbidity. Informal caregivers can help patients to manage head and neck cancer and its emotional impacts, both during and after treatment. Caregivers, however, can experience considerable stress as a result of their caring activities. Supportive relationships can protect caregivers from psychosocial strain. Thirty-one head and neck cancer caregivers were interviewed about their experiences of accessing social support from their social networks; difficulties that they experienced accessing this support; and strategies that they used to address these difficulties. Results suggest that head and neck cancer caregivers strongly value social support, but can find it difficult to obtain, and a number of them experience socially negative responses from their networks. Some carers attempt to answer or supplement support deficiencies by turning to non-human coping supports, such as pets, spiritual figures or medication. Implications for theory and practice are discussed.
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Affiliation(s)
- M Balfe
- Department of Sociology, University College Cork, Cork, Ireland
| | - K Keohane
- Department of Sociology, University College Cork, Cork, Ireland
| | - K O'Brien
- National Cancer Registry of Ireland, Cork, Ireland
| | - L Sharp
- Newcastle University, New Castle upon Tyne, UK
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46
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Payne K, Davison N, Thompson AJ, O'Brien K, Bruce IA. Use of a structured elicitation exercise to estimate the prevalence of OME in children with cleft palate. Clin Otolaryngol 2016; 42:904-907. [PMID: 27743503 DOI: 10.1111/coa.12771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/05/2016] [Indexed: 11/28/2022]
Affiliation(s)
- K Payne
- Manchester Centre for Health Economics, The University of Manchester, Manchester, UK
| | - N Davison
- Manchester Centre for Health Economics, The University of Manchester, Manchester, UK
| | - A J Thompson
- Manchester Centre for Health Economics, The University of Manchester, Manchester, UK
| | - K O'Brien
- School of Dentistry, The University of Manchester, Manchester, UK
| | - I A Bruce
- Royal Manchester Children's Hospital and Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
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47
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Puhl RM, Latner JD, O'Brien K, Luedicke J, Forhan M, Danielsdottir S. Cross-national perspectives about weight-based bullying in youth: nature, extent and remedies. Pediatr Obes 2016; 11:241-50. [PMID: 26149218 DOI: 10.1111/ijpo.12051] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [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: 01/31/2015] [Accepted: 05/20/2015] [Indexed: 11/29/2022]
Abstract
BACKGROUND No cross-national studies have examined public perceptions about weight-based bullying in youth. OBJECTIVES To conduct a multinational examination of public views about (i) the prevalence/seriousness of weight-based bullying in youth; (ii) the role of parents, educators, health providers and government in addressing this problem and (iii) implementing policy actions to reduce weight-based bullying. METHODS A cross-sectional survey of adults in the United States, Canada, Iceland and Australia (N = 2866). RESULTS Across all countries, weight-based bullying was identified as the most prevalent reason for youth bullying, by a substantial margin over other forms of bullying (race/ethnicity, sexual orientation and religion). Participants viewed parents and teachers as playing major roles in efforts to reduce weight-based bullying. Most participants across countries (77-94%) viewed healthcare providers to be important intervention agents. Participants (65-87%) supported government augmentation of anti-bullying laws to include prohibiting weight-based bullying. Women expressed higher agreement for policy actions than men, with no associations found for participants' race/ethnicity or weight. Causal beliefs about obesity were associated with policy support across countries. CONCLUSIONS Across countries, strong recognition exists of weight-based bullying and the need to address it. These findings may inform policy-level actions and clinical practices concerning youth vulnerable to weight-based bullying.
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Affiliation(s)
- R M Puhl
- Rudd Center for Food Policy and Obesity, University of Connecticut, Hartford, Connecticut, USA
| | - J D Latner
- Department of Psychology, University of Hawai'i at Manoa, Honolulu, Hawaii, USA
| | - K O'Brien
- School of Social Sciences, Monash University, Melbourne, Australia
| | - J Luedicke
- Rudd Center for Food Policy and Obesity, University of Connecticut, Hartford, Connecticut, USA
| | - M Forhan
- Department of Occupational Therapy, University of Alberta, Edmonton, Alberta, Canada
| | - S Danielsdottir
- Division of Health Determinants, Directorate of Health, Reykjavik, Iceland
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Tonkopi E, O'Brien K. MO-FG-CAMPUS-IeP1-03: Establishment of Provincial Diagnostic Reference Levels in Pediatric Imaging. Med Phys 2016. [DOI: 10.1118/1.4957335] [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: 11/07/2022] Open
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Tricco AC, Lillie E, Zarin W, O'Brien K, Colquhoun H, Kastner M, Levac D, Ng C, Sharpe JP, Wilson K, Kenny M, Warren R, Wilson C, Stelfox HT, Straus SE. A scoping review on the conduct and reporting of scoping reviews. BMC Med Res Methodol 2016; 16:15. [PMID: 26857112 PMCID: PMC4746911 DOI: 10.1186/s12874-016-0116-4] [Citation(s) in RCA: 765] [Impact Index Per Article: 95.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 01/26/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Scoping reviews are used to identify knowledge gaps, set research agendas, and identify implications for decision-making. The conduct and reporting of scoping reviews is inconsistent in the literature. We conducted a scoping review to identify: papers that utilized and/or described scoping review methods; guidelines for reporting scoping reviews; and studies that assessed the quality of reporting of scoping reviews. METHODS We searched nine electronic databases for published and unpublished literature scoping review papers, scoping review methodology, and reporting guidance for scoping reviews. Two independent reviewers screened citations for inclusion. Data abstraction was performed by one reviewer and verified by a second reviewer. Quantitative (e.g. frequencies of methods) and qualitative (i.e. content analysis of the methods) syntheses were conducted. RESULTS After searching 1525 citations and 874 full-text papers, 516 articles were included, of which 494 were scoping reviews. The 494 scoping reviews were disseminated between 1999 and 2014, with 45% published after 2012. Most of the scoping reviews were conducted in North America (53%) or Europe (38%), and reported a public source of funding (64%). The number of studies included in the scoping reviews ranged from 1 to 2600 (mean of 118). Using the Joanna Briggs Institute methodology guidance for scoping reviews, only 13% of the scoping reviews reported the use of a protocol, 36% used two reviewers for selecting citations for inclusion, 29% used two reviewers for full-text screening, 30% used two reviewers for data charting, and 43% used a pre-defined charting form. In most cases, the results of the scoping review were used to identify evidence gaps (85%), provide recommendations for future research (84%), or identify strengths and limitations (69%). We did not identify any guidelines for reporting scoping reviews or studies that assessed the quality of scoping review reporting. CONCLUSION The number of scoping reviews conducted per year has steadily increased since 2012. Scoping reviews are used to inform research agendas and identify implications for policy or practice. As such, improvements in reporting and conduct are imperative. Further research on scoping review methodology is warranted, and in particular, there is need for a guideline to standardize reporting.
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Affiliation(s)
- Andrea C Tricco
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada. .,Epidemiology Division, Dalla Lana School of Public Health, University of Toronto, 6th floor, 155 College St, Toronto, ON, M5T 3 M7, Canada.
| | - Erin Lillie
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Wasifa Zarin
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Kelly O'Brien
- Department of Physical Therapy, University of Toronto, 500 University Avenue, Room 160, Toronto, ON, M5G 1 V7, Canada. .,Institute of Health Policy, Management and Evaluation, University of Toronto, 4th Floor, 155 College St, Toronto, ON, M5T 3 M6, Canada.
| | - Heather Colquhoun
- Department of Occupational Science & Occupational Therapy, University of Toronto, 160-500 University Avenue, Toronto, ON, M5G 1 V7, Canada.
| | - Monika Kastner
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada. .,Epidemiology Division, Dalla Lana School of Public Health, University of Toronto, 6th floor, 155 College St, Toronto, ON, M5T 3 M7, Canada.
| | - Danielle Levac
- School of Rehabilitation Science, University of Ottawa, 200 Lees Avenue, Room A120, Ottawa, ON, K1N 6 N5, Canada.
| | - Carmen Ng
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Jane Pearson Sharpe
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Katherine Wilson
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Meghan Kenny
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Rachel Warren
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Charlotte Wilson
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada.
| | - Henry T Stelfox
- Department of Critical Care Medicine, University of Calgary, 3280 Hospital Drive NW, Calgary, AB, T2N 2 T9, Canada.
| | - Sharon E Straus
- Li Ka Shing Knowledge Institute of St. Michael's Hospital, 209 Victoria Street, Toronto, ON, M5B 1 W8, Canada. .,Department of Medicine, Faculty of Medicine, University of Toronto, 27 Kings College Circle, Toronto, ON, M5S 1A1, Canada.
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Diaz FJ, Hatakeyama T, Rho J, Wang Y, O'Brien K, Zhang X, Martijn de Sterke C, Kuhlmey BT, Palomba S. Sensitive method for measuring third order nonlinearities in compact dielectric and hybrid plasmonic waveguides. Opt Express 2016; 24:545-554. [PMID: 26832285 DOI: 10.1364/oe.24.000545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We demonstrate a sensitive method for the nonlinear optical characterization of micrometer long waveguides, and apply it to typical silicon-on-insulator nanowires and to hybrid plasmonic waveguides. We demonstrate that our method can detect extremely small nonlinear phase shifts, as low as 7.5·10<(-4) rad. The high sensitivity achieved imparts an advantage when investigating the nonlinear behavior of metallic structures as their short propagation distances complicates the task for conventional methods. Our results constitute the first experimental observation of χ((3)) nonlinearities in the hybrid plasmonic platform and is important to test claims of hybrid plasmonic structures as candidates for efficient nonlinear optical devices.
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