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Rezansoff SN, Moniruzzaman A, Fazel S, Procyshyn R, Somers JM. Adherence to antipsychotic medication among homeless adults in Vancouver, Canada: a 15-year retrospective cohort study. Soc Psychiatry Psychiatr Epidemiol 2016; 51:1623-1632. [PMID: 27338740 PMCID: PMC5091737 DOI: 10.1007/s00127-016-1259-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 06/15/2016] [Indexed: 12/22/2022]
Abstract
PURPOSE The purpose of this study was to investigate the level of adherence to antipsychotic prescription medication in a well-defined homeless cohort over a 15-year period. We hypothesized that adherence would be well below the recommended threshold for clinical effectiveness (80 %), and that it would be strongly associated with modifiable risk factors in the social environment in which homeless people live. METHOD Linked baseline data (including comprehensive population-level administrative prescription records) were examined in a subpopulation of participants from two pragmatic-randomized trials that investigated Housing First for homeless and mentally ill adults. Adherence to antipsychotic medication was operationalized using the medication possession ratio. Multivariable logistic regression was used to estimate effect sizes between socio-demographic, homelessness-related and illness factors, and medication possession ratio. RESULTS Among the 290 participants who met inclusion criteria for the current analysis, adherence to antipsychotic prescription was significantly associated with: history of psychiatric hospitalization; receipt of primary medical services; long-acting injectable antipsychotic formulations; and duration of homelessness. Mean medication possession ratio in the pre-randomization period was 0.41. Socio-demographic characteristics previously correlated with antipsychotic non-adherence were not significantly related to medication possession ratio. CONCLUSIONS This is the first study to quantify the very low level of adherence to antipsychotic medication among homeless people over an extended observation period of 15 years. Each of the four factors found to be significantly associated with adherence presents opportunities for intervention. Strategies to end homelessness for this population may represent the greatest opportunity to improve adherence to antipsychotic medication.
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Affiliation(s)
- Stefanie N Rezansoff
- Faculty of Health Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada.
| | - A Moniruzzaman
- Faculty of Health Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
| | - S Fazel
- Department of Psychiatry, University of Oxford, Warneford Hospital, Oxford, 0X3 7JX, UK
| | - R Procyshyn
- Department of Psychiatry, Faculty of Medicine, University of British Columbia, 2255 Wesbrook Mall, Vancouver, BC, V6T 2A1, Canada
| | - J M Somers
- Faculty of Health Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC, V5A 1S6, Canada
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O'Cathain A, Hoddinott P, Lewin S, Thomas KJ, Young B, Adamson J, Jansen YJ, Mills N, Moore G, Donovan JL. Maximising the impact of qualitative research in feasibility studies for randomised controlled trials: guidance for researchers. Pilot Feasibility Stud 2015; 1:32. [PMID: 27965810 PMCID: PMC5154038 DOI: 10.1186/s40814-015-0026-y] [Citation(s) in RCA: 241] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 08/13/2015] [Indexed: 01/02/2023] Open
Abstract
Feasibility studies are increasingly undertaken in preparation for randomised controlled trials in order to explore uncertainties and enable trialists to optimise the intervention or the conduct of the trial. Qualitative research can be used to examine and address key uncertainties prior to a full trial. We present guidance that researchers, research funders and reviewers may wish to consider when assessing or undertaking qualitative research within feasibility studies for randomised controlled trials. The guidance consists of 16 items within five domains: research questions, data collection, analysis, teamwork and reporting. Appropriate and well conducted qualitative research can make an important contribution to feasibility studies for randomised controlled trials. This guidance may help researchers to consider the full range of contributions that qualitative research can make in relation to their particular trial. The guidance may also help researchers and others to reflect on the utility of such qualitative research in practice, so that trial teams can decide when and how best to use these approaches in future studies.
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Affiliation(s)
- Alicia O'Cathain
- Medical Care Research Unit, School of Health and Related Research, University of Sheffield, Regent Street, Sheffield, S1 4DA UK
| | - Pat Hoddinott
- Primary Care, Nursing Midwifery and Allied Health Professionals Research Unit, University of Stirling, Stirling, FK9 4LA Scotland UK
| | - Simon Lewin
- Global Health Unit, Norwegian Knowledge Centre for the Health Services, Oslo, Norway ; Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
| | - Kate J Thomas
- Medical Care Research Unit, School of Health and Related Research, University of Sheffield, Regent Street, Sheffield, S1 4DA UK
| | - Bridget Young
- Institute of Psychology, Health and Society, University of Liverpool, Waterhouse Building, Block B, Brownlow Street, Liverpool, L69 3GL UK
| | - Joy Adamson
- Department of Health Sciences, University of York, Seebohm Rowntree Building, Heslington, York, YO10 5DD UK
| | - Yvonne Jfm Jansen
- Behavioural and Societal Sciences, Work, Health & Care, Schoemakerstraat 97 (Gebouw A), Delft, 2628 VK Netherlands
| | - Nicola Mills
- School of Social and Community Medicine, University of Bristol, Canynge Hall, 39 Whatley Road, Bristol, BS8 2PS UK
| | - Graham Moore
- Centre for the Development and Evaluation of Complex Interventions for Public Health Improvement, Cardiff University, Cardiff, CF10 3XQ UK
| | - Jenny L Donovan
- School of Social and Community Medicine, University of Bristol, Canynge Hall, 39 Whatley Road, Bristol, BS8 2PS UK
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El-Mallakh P, Findlay J. Strategies to improve medication adherence in patients with schizophrenia: the role of support services. Neuropsychiatr Dis Treat 2015; 11:1077-90. [PMID: 25931823 PMCID: PMC4404876 DOI: 10.2147/ndt.s56107] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The purpose of this review is to describe research over the past 10 years on the role of support services in promoting medication adherence in mental health consumers diagnosed with schizophrenia. A literature search was conducted using the terms "medication adherence," "schizophrenia," and "support services," using Medline, PubMed, and CINAHL. Reference lists from published studies were also reviewed to identify additional research studies. Twenty-two articles focused on support-service intervention studies, and these were selected for review. Available support-service interventions include adherence therapy, electronic reminders via text messages and telephones, cognitive-behavioral and motivational strategies, and financial incentives. Support-service intervention strategies need to be tailored to the specific needs of mental health consumers with schizophrenia. More research is needed to investigate effective support services to enhance long-term adherence and adherence to medications for medical illnesses in this population.
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Affiliation(s)
| | - Jan Findlay
- College of Nursing, University of Kentucky, Lexington, KY, USA
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