1
|
Bowles J, Mansoor M, Werb D, Kerr T, Bardwell G. A qualitative assessment of tablet injectable opioid agonist therapy (TiOAT) in rural and smaller urban British Columbia, Canada: Motivations and initial impacts. JOURNAL OF SUBSTANCE USE AND ADDICTION TREATMENT 2024; 157:209185. [PMID: 37865289 DOI: 10.1016/j.josat.2023.209185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 06/19/2023] [Accepted: 10/16/2023] [Indexed: 10/23/2023]
Abstract
BACKGROUND The evolving and unpredictable unregulated drug market has driven an unprecedented overdose crisis that requires effective intervention. Growing evidence suggests that novel opioid agonist treatments, such as tablet injectable opioid agonist therapy (TiOAT), have potential to prevent overdoses and other drug-related harms. More evidence is needed to characterize their utility in achieving these outcomes. The current article is an analysis of two TiOAT programs implemented in British Columbia, Canada, to assess impact on health and well-being, including overdose risk. Moreover, we explored participants' enrollment goals and if they were achieved. METHODS The study employed qualitative methods to evaluate the TiOAT program in two sites between October 2021 and April 2022. We developed a semi-structured interview tool to guide in depth interviews. All interviews (n = 32) took place on teleconference software or in person. Thematic analysis allowed for the emergence of themes associated with TiOAT participation. RESULTS Participants discussed various motivations for enrolling in TiOAT, which included gaining financial stability, reducing or eliminating drug use, addressing withdrawal symptoms, wanting to work, and improving social circumstances. An assessment of initial programmatic impacts revealed that many participant-identified motivators were achieved. Participants also reported fewer or no overdoses since starting TiOAT, and many reported switching from injecting to smoking drugs. Some challenges included adequate dosing as evidenced by ongoing withdrawal and pain. Some participants requested additional opioids, such as diacetylmorphine, to aid in reducing illicit drug use. CONCLUSION Participants described how TiOAT helped them to achieve many of their goals. Suggested programmatic improvements include enhanced patient-provider co-design with respect to dosing to address ongoing withdrawal and pain. As the unpredictability the unregulated drug market worsens, novel options, such as TiOAT, ought to be implemented broadly to reduce overdose events and improve quality of life for people who use drugs.
Collapse
Affiliation(s)
- Jeanette Bowles
- British Columbia Centre on Substance Use, 400-1045 Howe Street, Vancouver, BC V6Z 2A9, Canada; Department of Medicine, University of British Columbia, St. Paul's Hospital, 608-1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada.
| | - Manal Mansoor
- British Columbia Centre on Substance Use, 400-1045 Howe Street, Vancouver, BC V6Z 2A9, Canada; Department of Medicine, University of British Columbia, St. Paul's Hospital, 608-1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada
| | - Dan Werb
- University of California San Diego, Division of Infectious Diseases and Global Public Health, La Jolla, CA, United States; Centre on Drug Policy Evaluation, Li Ka Shing Knowledge Institute, St. Michael's Hospital: Toronto, ON, Canada
| | - Thomas Kerr
- British Columbia Centre on Substance Use, 400-1045 Howe Street, Vancouver, BC V6Z 2A9, Canada; Department of Medicine, University of British Columbia, St. Paul's Hospital, 608-1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada
| | - Geoff Bardwell
- British Columbia Centre on Substance Use, 400-1045 Howe Street, Vancouver, BC V6Z 2A9, Canada; Department of Medicine, University of British Columbia, St. Paul's Hospital, 608-1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada; School of Public Health Sciences, Faculty of Health, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1, Canada
| |
Collapse
|
2
|
Dobischok S, Carvajal JR, Turner K, Jaffe K, Lehal E, Blawatt S, Redquest C, Baltzer Turje R, McDougall P, Koch B, McDermid C, Hassan D, Harrison S, Oviedo-Joekes E. "It feels like I'm coming to a friend's house": an interpretive descriptive study of an integrated care site offering iOAT (Dr. Peter Centre). Addict Sci Clin Pract 2023; 18:73. [PMID: 38042844 PMCID: PMC10693115 DOI: 10.1186/s13722-023-00428-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 11/20/2023] [Indexed: 12/04/2023] Open
Abstract
BACKGROUND Injectable opioid agonist treatment (iOAT) has proven to be a safe and effective treatment option for severe opioid use disorder (OUD). Yet, iOAT is often isolated from other health and social services. To align with a person-centered care approach, iOAT can be embedded in sites that combine systems and services that have been historically fragmented and that address multiple comorbidities (integrated care sites). The present study investigates the addition of iOAT at an integrated care in Vancouver, British Columbia. We aimed to capture what it means for service users and service providers to incorporate iOAT in an integrated care site and describe the processes by which the site keeps people engaged. METHODS We conducted 22 interviews with 15 service users and 14 interviews with 13 service providers across two rounds of individual semi-structured interviews (Fall 2021, Summer 2022). The second interview round was precipitated by a service interruption in medication dispensation. Interview audio was recorded, transcribed, and then analysed in NVivo 1.6 following an interpretive description approach. RESULTS The emergent themes from the analysis are represented in two categories: (1) a holistic approach (client autonomy, de-medicalized care, supportive staff relationships, multiple opportunities for engagement, barriers to iOAT integration) and (2) a sense of place (physical location, social connection and community belonging, food). CONCLUSION Incorporating iOAT at an integrated care site revealed how iOAT delivery can be strengthened through its direct connection to a diverse, comprehensive network of health and social services that are provided in a community atmosphere with high quality therapeutic relationships.
Collapse
Affiliation(s)
- Sophia Dobischok
- Centre for Advancing Health Outcomes, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada
- Department of Education and Counselling Psychology, McGill University, 3700 McTavish St., Montreal, QC, H3A 1Y2, Canada
| | - José R Carvajal
- Centre for Advancing Health Outcomes, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada
| | - Kyle Turner
- Centre for Advancing Health Outcomes, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada
| | - Kaitlyn Jaffe
- Department of Health Promotion and Policy, University of Massachusetts Amherst, 715 North Pleasant Street, Amherst, MA, 01003, USA
| | - Eisha Lehal
- Centre for Advancing Health Outcomes, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada
| | - Sarinn Blawatt
- Centre for Advancing Health Outcomes, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada
| | - Casey Redquest
- Dr. Peter Centre, 1110 Comox Street, Vancouver, BC, V6E 1K5, Canada
| | | | | | - Bryce Koch
- Dr. Peter Centre, 1110 Comox Street, Vancouver, BC, V6E 1K5, Canada
| | - Cheryl McDermid
- Dr. Peter Centre, 1110 Comox Street, Vancouver, BC, V6E 1K5, Canada
- Providence Health Care, Providence Crosstown Clinic, 77 East Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - Damon Hassan
- Dr. Peter Centre, 1110 Comox Street, Vancouver, BC, V6E 1K5, Canada
| | - Scott Harrison
- Providence Health Care, Providence Crosstown Clinic, 77 East Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - Eugenia Oviedo-Joekes
- Centre for Advancing Health Outcomes, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada.
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada.
| |
Collapse
|
3
|
Blawatt S, Arreola LAG, Magel T, MacDonald S, Harrison S, Schechter MT, Oviedo-Joekes E. Changes in daily dose in open-label compared to double-blind: The role of clients' expectations in injectable opioid agonist treatment. Addict Behav Rep 2023; 17:100490. [PMID: 37124402 PMCID: PMC10140796 DOI: 10.1016/j.abrep.2023.100490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 04/03/2023] [Accepted: 04/11/2023] [Indexed: 05/02/2023] Open
Abstract
Introduction Though double-blind studies have indicated that hydromorphone and diacetylmorphine produce similar effects when administered through injectable opioid agonist treatment (iOAT) programs, participant preference may influence some aspects of medication dispensation such as dose. Methods This is a retrospective longitudinal analysis. Participants (n = 131) were previously enrolled in a double-blind clinical trial for iOAT who continued to receive treatment in an open-label follow up study. Data included medication dispensation records from 2012 to 2020. Using linear regression and paired t-tests, average daily dose totals of hydromorphone and diacetylmorphine were examined comparatively between double-blind and open-label periods. A subgroup analysis explored dose difference by preference using the proxy, blinding guess, a variable used to facilitate the measurement of treatment masking during the clinical trial by asking which medication the participant thought they received. Results During the open-label period, participants prescribed diacetylmorphine received 49.5 mg less than during the double-blind period (95% CI -12.6,-86.4). Participants receiving hydromorphone did not see a significant dose decrease. Participants who guessed they received hydromorphone during the clinical trial, but learned they were on diacetylmorphine during the open-label period, saw a decrease in total daily dose of 78.3 mg less (95% CI -134.3,-22.4) during the open-label period. Conclusion If client preference is considered in the treatment of chronic opioid use disorder, clients may be able to better moderate their dose to suit their individual needs. Together with their healthcare providers, clients can participate in their treatment trajectories collaboratively to optimize client outcomes and promote person-centered treatment options.
Collapse
Affiliation(s)
- Sarin Blawatt
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada
| | | | - Tianna Magel
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
| | - Scott MacDonald
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver BCV6B 1G6, Canada
| | - Scott Harrison
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver BCV6B 1G6, Canada
| | - Martin T. Schechter
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada
| | - Eugenia Oviedo-Joekes
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada
- Corresponding author at: St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada.
| |
Collapse
|
4
|
Dobischok S, Metcalfe RK, Matzinger EA, Lock K, Harrison S, MacDonald S, Amara S, Schechter MT, Bansback N, Oviedo-Joekes E. Feasibility of Testing Client Preferences for Accessing Injectable Opioid Agonist Treatment (iOAT): A Pilot Study. Patient Prefer Adherence 2022; 16:3405-3413. [PMID: 36582266 PMCID: PMC9793789 DOI: 10.2147/ppa.s391532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/23/2022] [Indexed: 12/24/2022] Open
Abstract
PURPOSE Injectable opioid agonist treatment (iOAT) is an effective treatment for opioid use disorder (OUD). To our knowledge, no research has systematically studied client preferences for accessing iOAT. Incorporating preferences could help meet the heterogenous needs of clients and make addiction care more person-centred. This paper presents a pilot study of a best-worst scaling (BWS) preference elicitation survey that aimed to assess if the survey was feasible and accessible for our population and to test that the survey could gather sound data that would suit our planned analyses. PATIENTS AND METHODS Current and former iOAT clients (n = 18) completed a BWS survey supported by an interviewer using a think-aloud approach. The survey was administered on PowerPoint, and responses and contextual field notes were recorded manually. Think-aloud audio was recorded on Audacity. RESULTS Clients' feedback fell into five categories: framing of the task, accessibility, conceptualization of attributes and levels, formatting, and behaviour predicting questions. Survey repetitiveness was the most consistent feedback. The data simulation showed that 100 responses should provide an adequate sample size. CONCLUSION This pilot demonstrates the type of analysis that can be done with BWS in our population, suggests that such analysis is feasible, and highlights the importance of the interviewer and participant working side-by-side throughout the task.
Collapse
Affiliation(s)
- Sophia Dobischok
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, Vancouver, BC, Canada
| | - Rebecca K Metcalfe
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, Vancouver, BC, Canada
| | | | - Kurt Lock
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, Vancouver, BC, Canada
- BC Centre for Disease Control, Provincial Health Services Authority, Vancouver, BC, Canada
| | - Scott Harrison
- Providence Health Care, Providence Crosstown Clinic, Vancouver, BC, Canada
| | - Scott MacDonald
- Providence Health Care, Providence Crosstown Clinic, Vancouver, BC, Canada
| | - Sherif Amara
- SafePoint Supervised Consumption Site, Fraser Health Authority, Surrey, BC, Canada
| | - Martin T Schechter
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, Vancouver, BC, Canada
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Nick Bansback
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, Vancouver, BC, Canada
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Eugenia Oviedo-Joekes
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, Vancouver, BC, Canada
- School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
- Correspondence: Eugenia Oviedo-Joekes, Centre for Health Evaluation and Outcome Sciences, St. Paul’s Hospital, 575-1081 Burrard St, Vancouver, BC, V6Z 1Y6, Canada, Tel +1 604-682-2344 Ext. 62973, Fax +1-604-806-8210, Email
| |
Collapse
|
5
|
Palis H, Marchand K, Peachey GS, Westfall J, Lock K, MacDonald S, Jun J, Bojanczyk-Shibata A, Harrison S, Marsh DC, Schechter MT, Oviedo-Joekes E. Exploring the effectiveness of dextroamphetamine for the treatment of stimulant use disorder: a qualitative study with patients receiving injectable opioid agonist treatment. SUBSTANCE ABUSE TREATMENT PREVENTION AND POLICY 2021; 16:68. [PMID: 34530878 PMCID: PMC8444161 DOI: 10.1186/s13011-021-00399-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Accepted: 08/03/2021] [Indexed: 11/10/2022]
Abstract
Background A high proportion of people receiving both oral and injectable opioid agonist treatment report concurrent use of stimulants (i.e. cocaine and or amphetamines), which has been associated with higher rates of continued illicit opioid use and treatment dropout. A recent randomized controlled trial demonstrated the effectiveness of dextroamphetamine (a prescribed stimulant) at reducing craving for and use of cocaine among patients receiving injectable opioid agonist treatment. Following this evidence, dextroamphetamine has been prescribed to patients with stimulant use disorder at a clinic in Vancouver. This study investigates perceptions of the effectiveness of dextroamphetamine from the perspective of these patients. Methods Data were collected using small focus groups and one-on-one interviews with patients who were currently or formerly receiving dextroamphetamine (n = 20). Thematic analysis was conducted using an iterative approach, moving between data collection and analysis to search for patterns in the data across transcripts. This process led to the defining and naming of three central themes responding to the research question. Results Participants reported a range of stimulant use types, including cocaine (n = 8), methamphetamine (n = 8), or both (n = 4). Three central themes were identified as relating to participants’ perceptions of the effectiveness of the medication: 1) achieving a substitution effect (i.e. extent to which dextroamphetamine provided a substitution for the effect they received from use of illicit stimulants); 2) Reaching a preferred dose (i.e. speed of titration and effect of the dose received); and 3) Ease of medication access (i.e. preference for take home doses (i.e. carries) vs. medication integrated into care at the clinic). Conclusion In the context of continued investigation of pharmacological treatments for stimulant use disorder, the present study has highlighted how the study of clinical outcomes could be extended to account for factors that contribute to perceptions of effectiveness from the perspective of patients. In practice, elements of treatment delivery (e.g. dosing and dispensation protocols) can be adjusted to allow for various scenarios (e.g. on site vs. take home dosing) by which dextroamphetamine and other pharmacological stimulants could be implemented to provide “effective” treatment for people with a wide range of treatment goals and needs.
Collapse
Affiliation(s)
- Heather Palis
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St, Vancouver, BC, V6Z 1Y6, Canada.
| | - Kirsten Marchand
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St, Vancouver, BC, V6Z 1Y6, Canada
| | | | | | - Kurt Lock
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St, Vancouver, BC, V6Z 1Y6, Canada
| | - Scott MacDonald
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - Jennifer Jun
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - Anna Bojanczyk-Shibata
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - Scott Harrison
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - David C Marsh
- Northern Ontario School of Medicine, 935 Ramsey Lake Road, Sudbury, ON, P3E 2C6, Canada.,Canadian Addiction Treatment Centres, 175 Commerce Valley West, Suite 300, Markham, Ontario, L3T 7P6, Canada.,ICES North, 41 Ramsey Lake Rd, Sudbury, ON, P3E 5J1, Canada.,Health Sciences North Research Institute, 56 Walford Rd, Sudbury, ON, P3E 2H2, Canada
| | - Martin T Schechter
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Eugenia Oviedo-Joekes
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada
| |
Collapse
|
6
|
Marchand K, Palis H, Guh D, Lock K, MacDonald S, Brissette S, Marsh DC, Harrison S, Schechter MT, Oviedo-Joekes E. A multi-methods and longitudinal study of patients' perceptions in injectable opioid agonist treatment: Implications for advancing patient-centered methodologies in substance use research. J Subst Abuse Treat 2021; 132:108512. [PMID: 34098207 DOI: 10.1016/j.jsat.2021.108512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/13/2021] [Accepted: 05/26/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Patients' perceptions are vital to the delivery and evaluation of substance use treatment. They are most frequently collected at one time-point and measured using patient satisfaction questionnaires or qualitative methodologies. Interestingly, the findings of these studies often diverge, as satisfaction scores tend to be highly positive, while qualitative findings suggest dissatisfaction and areas for improvement. This divergence limits current understandings of patients' perceptions and their potential change over time in treatment. OBJECTIVE This study explores the relationship between open-ended positive and negative perceptions of treatment and patient satisfaction scores over time. METHODS The RUTH (Research on the Utilization of Therapeutic Hydromorphone) prospective cohort study included 131 participants receiving injectable diacetylmorphine or hydromorphone in Canada's first injectable opioid agonist treatment (iOAT) program. The study collected the Client Satisfaction Questionnaire (CSQ-8) at eight time-points over an 18-month period. Following a multi-methods approach, the study complemented the CSQ-8 with open-ended positive and negative comments of iOAT. The research team analyzed these comments thematically at each time-point to develop positive and negative perception themes. We then used growth curve modeling to explore the relationship between positive and negative perception themes and patient satisfaction over time. FINDINGS Over the eight time-points, six positive and eight negative perception themes emerged, broadly reflecting structural (e.g., expansion of iOAT), process (e.g., schedules), relational (e.g., interactions with providers), and outcome-related (e.g., met/unmet needs) perceptions of iOAT. On average, participants reported high satisfaction (grand mean = 29.2 out of 32), and scores did not significantly change over time. However, we did find significant unexplained variation within participants in their satisfaction trajectories and between participants in their initial satisfaction scores. In conditional growth curve models, the theme "unfavorable interactions with providers" had the strongest independent effect on overall satisfaction trajectories. CONCLUSIONS This study provides an example of how open-ended comments can be integrated with patient satisfaction questionnaire data to gather a comprehensive and patient-centered evaluation of substance use treatment. Considering the iOAT context specifically, relational dynamics and daily treatment access were significant predictors of patient satisfaction over time and may be attributes of iOAT that require further investigation.
Collapse
Affiliation(s)
- Kirsten Marchand
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada; School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada.
| | - Heather Palis
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada; School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
| | - Daphne Guh
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada
| | - Kurt Lock
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada
| | - Scott MacDonald
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC V6B 1G6, Canada
| | - Suzanne Brissette
- Centre Hospitalier de l'Université de Montréal (CHUM), 1000 Sanguinet, Montréal, QC H2X 0C1, Canada
| | - David C Marsh
- Northern Ontario School of Medicine, 935 Ramsey Lake Road, Sudbury, ON, P3E 2C6, Canada; Canadian Addiction Treatment Centres, 300-175 Commerce Valley West, Markham, ON L3T 7P6, Canada
| | - Scott Harrison
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC V6B 1G6, Canada
| | - Martin T Schechter
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada; School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
| | - Eugenia Oviedo-Joekes
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575-1081 Burrard St., Vancouver, BC V6Z 1Y6, Canada; School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC V6T 1Z3, Canada
| |
Collapse
|
7
|
Palis H, Guh D, MacDonald S, Harrison S, Brissette S, Marsh DC, Schechter MT, Oviedo-Joekes E. Longitudinal patterns of cocaine use among patients receiving injectable hydromorphone or diacetylmorphine for the treatment of opioid use disorder: A growth curve modeling approach. Drug Alcohol Depend 2021; 218:108333. [PMID: 33268225 DOI: 10.1016/j.drugalcdep.2020.108333] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND AIMS Cocaine use is prevalent among people receiving injectable opioid agonist treatment. Investigations of cocaine use in this population have been descriptive and the potential heterogeneity existing in patterns of use have not been characterized. As such, among patients receiving injectable opioid agonist treatment, this study aimed to: 1) quantify intra- and inter-individual variation in cocaine use over 24-months and; 2) determine how predictors of interest explained this variation. METHODS Participants were patients receiving injectable opioid agonist treatment for opioid use disorder. Study visits were completed at baseline prior to receiving treatment, and 3,6,9,12,18, and 24 months after baseline. A multi-level regression approach to growth curve modeling was employed to estimate and explain intra- (within-person) and inter-individual (between-person) variation in cocaine use. RESULTS Significant intra and inter-individual variation in cocaine use was identified over 24-months. Treatment engagement was on average associated with reductions in the prior month number of days of cocaine use (range: 0-30)(Estimate (standard error): -0.05(0.02), p = 0.003). On average, men reported less cocaine use compared to women (Estimate (standard error): -5.91(1.57), p=<0.001), and participants reporting ever regularly using cocaine at baseline reported more cocaine use over 24-months compared to participants reporting never regularly using cocaine (Estimate (standard error): 4.72 (1.91), p = 0.013). CONCLUSIONS Significant reductions in cocaine use were observed and significant heterogeneity in patterns of cocaine use was identified. These heterogeneous cocaine use profiles suggest that an individualized approach to care will be critical in responding to patients' cocaine use in injectable opioid agonist treatment.
Collapse
Affiliation(s)
- Heather Palis
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada; School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada.
| | - Daphne Guh
- School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Scott MacDonald
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - Scott Harrison
- Providence Health Care, Providence Crosstown Clinic, 84 West Hastings Street, Vancouver, BC, V6B 1G6, Canada
| | - Suzanne Brissette
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), 900 St-Denis, Montréal, QC, H2X 0A9, Canada
| | - David C Marsh
- Northern Ontario School of Medicine, 935 Ramsey Lake Road, Sudbury, ON, P3E 2C6, Canada; Canadian Addiction Treatment Centres, 175 Commerce Valley West, Suite 300, Markham, Ontario, L3T 7P6, Canada; ICES North, 41 Ramsey Lake Rd, Sudbury, ON, P3E 5J1, Canada; Health Sciences North Research Institute, 56 Walford Rd, Sudbury, ON, P3E 2H2, Canada
| | - Martin T Schechter
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada; School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada
| | - Eugenia Oviedo-Joekes
- Centre for Health Evaluation & Outcome Sciences, Providence Health Care, St. Paul's Hospital, 575- 1081 Burrard St., Vancouver, BC, V6Z 1Y6, Canada; School of Population and Public Health, University of British Columbia, 2206 East Mall, Vancouver, BC, V6T 1Z3, Canada
| |
Collapse
|