Predictors of methadone treatment retention from a multi-site study: a survival analysis

Association of hospital-based substance use supports on emergency department revisits: a retrospective cohort study in Sudbury, Canada from 2018 to 2022

BACKGROUND

This study compares emergency department (ED) revisits for patients receiving hospital-based substance-use support compared to those who did not receive specialized addiction services at Health Sciences North in Sudbury, Ontario, Canada.

METHODS

The study is a retrospective observational study using administrative data from all patients presenting with substance use disorder (SUD) at Health Sciences North from January 1, 2018, and August 31, 2022 with ICD-10 codes from the Discharge Abstract Database (DAD) and the National Ambulatory Care Database (NACRS). There were two interventions under study: addiction medicine consult services (AMCS group), and specialized addiction medicine unit (AMU group). The AMCS is a consult service offered for patients in the ED and those who are admitted to the hospital. The AMU is a specialized inpatient medical unit designed to offer addiction support to stabilize patients that operates under a harm-reduction philosophy. The primary outcome was all cause ED revisit within 30 days of the index ED or hospital visit. The secondary outcome was all observed ED revisits in the study period. Kaplan-Meier curves were used to measure the proportion of 30-day revisits by exposure group. Odds ratios and Hazard Ratios were calculated using logistic regression models with random effects and Cox-proportional hazard model respectively.

RESULTS

A total of 5,367 patients with 10,871 ED index visits, and 2,127 revisits between 2018 and 2022 are included in the study. 45% (2,340/5,367) of patient were not admitted to hospital. 30-day revisits were less likely among the intervention group: Addiction Medicine Consult Services (AMCS) in the ED significantly reduced the odds of revisits (OR 0.53, 95% CI 0.39-0.71, p < 0.01) and first revisits (OR 0.42, 95% CI 0.33-0.53, p < 0.01). The AMU group was associated with lower revisits odds (OR 0.80, 95% CI 0.66-0.98, p = 0.03). For every additional year of age, the odds of revisits slightly decreased (OR 0.99, 95% CI 0.98-1.00, p = 0.01) and males were found to have an increased risk compared to females (OR 1.50, 95% CI 1.35-1.67, p < 0.01).

INTERPRETATION

We observe statistically significant differences in ED revisits for patients receiving hospital-based substance-use support at Health Sciences North. Hospital-based substance-use supports could be applied to other hospitals to reduce 30-day revisits.

Retention and critical outcomes among new methadone maintenance patients following extended take-home reforms: a retrospective observational cohort study

Background

Approximately 1800 opioid treatment programs (OTPs) in the US dispense methadone to upwards of 400,000 patients with opioid use disorder (OUD) annually, operating under longstanding highly restrictive guidelines. OTPs were granted novel flexibilities beginning March 15, 2020, allowing for reduced visit frequency and extended take-home doses to minimize COVID exposure with great variation across states and sites. We sought to use electronic health records to compare retention in treatment, opioid use, and adverse events among patients newly entering methadone maintenance in the post-reform period in comparison with year-ago, unexposed, controls.

Methods

Retrospective observational cohort study across 9 OTPs, geographically dispersed, in the National Institute of Drug Abuse (NIDA) Clinical Trials Network. Newly enrolled patients between April 15 and October 14, 2020 (post-COVID, reform period) v. March 15-September 14, 2019 (pre-COVID, control period) were assessed. The primary outcome was 6-month retention. Secondary outcomes were opioid use and adverse events including emergency department visits, hospitalizations, and overdose.

Findings

821 individuals were newly admitted in the post-COVID and year-ago control periods, average age of 38.3 (SD 11.1), 58.9% male. The only difference across pre- and post-reform groups was the prevalence of psychostimulant use disorder (25.7% vs 32.9%, p = 0.02). Retention was non-inferior (60.0% vs 60.1%) as were hazards of adverse events in the aggregate (X2 (1) = 0.55, p = 0.46) in the post-COVID period. However, rates of month-level opioid use were higher among post-COVID intakes compared to pre-COVID controls (64.8% vs 51.1%, p < 0.001). Moderator analyses accounting for stimulant use and site-level variation in take-home schedules did not change findings.

Interpretation

Policies allowing for extended take-home schedules were not associated with worse retention or adverse events despite slightly elevated rates of measured opioid use while in care. Relaxed guidelines were not associated with measurable increased harms and findings could inform future studies with prospective trials.

Funding

USDHHSNIDACTNUG1DA013035-15.

COVID-19-related flexibility in methadone take-home doses associated with decreased attrition: Report from an opioid treatment program in central Pennsylvania

INTRODUCTION

Pennsylvania saw a dramatic increase in take-home doses of methadone after the COVID-19 pandemic-related relaxation in regulations. We evaluated whether pandemic-initiated relaxation in take-home methadone dose regulations was associated with changes in attrition and urine drug test (UDT) results at one outpatient opioid treatment program (OTP) among adult patients treated with methadone for opioid use disorder (OUD).

METHODS

We analyzed aggregated, retrospective clinical practice data, using data abstracted from the OTP's electronic health record (EHR) on the number of patients treated with methadone, those allowed take-home doses, the number of take-home methadone doses dispensed, and the number and type of patient discharge ("attrition") from treatments for 12 months before (March 2019-February 2020; "pre-pandemic") and 12 months after (March 2020-February 2021; "pandemic") the regulatory changes took place. We also examined monthly aggregate data on the number of urine samples testing positive for amphetamines, cocaine, benzodiazepines or illicit opioids, and compared these findings between the pre-pandemic and pandemic periods.

RESULTS

Pre-pandemic, 229 patients were treated with methadone, compared to 278 patients during the pandemic period. They received 11,047 and 28,563 take-home daily-doses of methadone (p < 0.0001) during each assessment period, respectively. All-cause treatment attrition (discharge from the program for any reason) decreased from 27.1 % in the pre-pandemic to 15.5 % in the pandemic period (p < 0.001). Compared to pre-pandemic, during the pandemic period the urine toxicology testing showed reduced positivity rates for cocaine (26.4 % vs 18.9 %, p < 0.001), and oxycodone and morphine (1.8 % vs 1.1 %, p < 0.019), and increased for fentanyl (24.0 % vs 30.5 %, p < 0.007), without statistically significant changes for benzodiazepines or amphetamines.

CONCLUSIONS

The relaxation of regulations guiding take-home methadone doses accompanied reduced treatment attrition and favorable changes in urine toxicology results in one OTP. Allowing OTPs to apply flexible decisions regarding take-home methadone doses could improve treatment retention, outcomes, and, in turn, save lives.

The switching process from buprenorphine sublingual tablets to the monthly buprenorphine subcutaneous depot injection in opioid dependent patients

The 2018 European Union (EU) approved weekly and monthly subcutaneous buprenorphine depot injection (BUP-XR), for opioid substitution medication proved to offer some specific treatment benefits. The present study examines the process of switching from buprenorphine sublingual tablets (BUP-SL) to BUP-XR from a patient's point of view. In total, nine patients were surveyed by means of an open-answer questionnaire regarding course and side effects of the medication switch. Six of these patients were surveyed in more detail under BUP-SL, as well as 4 and 16 weeks after the switch to BUP-XR by means of a test battery of questions on socio-demography, withdrawal symptoms, craving, physical well-being, treatment satisfaction and concomitant use of illegal substances. Patients reported significant worse physical well-being and lower treatment satisfaction in 4 weeks compared with 16 weeks after the medication switch to the BUP-XR. Furthermore, they reported significant more frequent co-use of illicit drugs, worse physical well-being, lower treatment satisfaction and more craving experience 4 weeks after the switch compared with the treatment under BUP-SL. Patients 16 weeks under BUP-XR reported significant more illicit co-use and lower treatment satisfaction compared with patients under BUP-SL. Connections between therapy dissatisfaction, physical discomfort, experienced craving and drug co-consumption were discovered. In the first weeks after the medication switch, patients experience potentially distressing symptoms, which, however, seem to diminish over time. Close supervision and comprehensive patient education on possible burdens of the medication switch to the BUP-XR might prevent unfavourable treatment courses and premature therapy dropouts.

Influence of CYP2B6 Genotype on Methadone Dosage in Patients from the Methadone Maintenance Treatment (MMT) Program in Pereira, Colombia

Methadone treatment reduces the use of heroin and withdrawal symptoms; however, methadone is an expensive medication with a narrow safety margin. We compared the retention rates, persistence of heroin use, and quality of life of a group of patients undergoing conventional Methadone Maintenance Treatment (MMT) with a group for whom the CYP2B6 516G>T polymorphism was used in addition to the MMT to calculate the required methadone dose. Over 12 weeks, the retention rate, heroin usage, and quality of life of patients under conventional treatment (n = 34) were compared with those of patients for whom we used genetic markers to calculate methadone dosage (n = 38). At the end of the study, 26.4% of patients abandoned the program, and neither demographic nor clinical variables were associated with treatment adherence. Of the remaining patients, 16% of the control group and 8% of patients in the pharmacogenetic group reported heroin use, while both groups showed a 64% reduction in the use of cocaine/crack (no significant differences between the groups were found). Starting in the second week, the methadone dosage was lower among the patients for whom methadone was prescribed based on genotype. Although there were six individuals in the control group and three in the pharmacogenetic group with QTc intervals > 450 ms (a threshold that is considered dangerous), we did not find a relationship between the QTc interval and methadone dosage. There were no differences in the perception of quality of life between the two groups. The results of this pilot study suggest that concerning methadone therapy, the CYP2B6 genotype contributes to reduced effective doses and treatment costs.

Malmö Treatment Referral and Intervention Study (MATRIS)-36-month follow-up on retention and substance use among patients referred from needle exchange to opioid agonist treatment-The role of stimulant use at baseline

INTRODUCTION

Opioid use disorder (OUD) is the leading cause of overdose morbidity and mortality globally. Retention in opioid agonist treatment (OAT) is crucial as it effectively reduces overdose mortality among individuals suffering from OUD. Previous research on treatment retention among heroin-dependent individuals referred from needle exchange programs (NEP) to OAT is scarce, and with predictors for retention in OAT being somewhat inconclusive, further investigations into this subject is of great interest. The aim of our study was to assess 36-month treatment outcomes-defined as retention and illicit drug abstinence-and predictors of OAT discontinuation.

METHODS

This is a longitudinal cohort study of 71 study subjects successfully referred from a NEP to OAT. Participants were included between October 2011 and April 2013 and followed for 36 months. The study collected data from a structured baseline interview and from patient records, including laboratory data.

RESULTS

At the 36-month follow-up, retention was 51 % (n = 36), with mean days in treatment of 422 for those who discontinued treatment. Amphetamine use during the 30 days before inclusion was positively correlated with treatment discontinuation (AOR 1.22 [95 % CI 1.02-1.46]). No statistically significant association with retention was seen for gender, age, suicide attempt prior to treatment, or benzodiazepine use during 30 days prior to treatment. Opiate use and use of other substances were reduced over time, with major reductions occurring during the first 6 months.

CONCLUSIONS

Hitherto, baseline factors predicting retention in OAT have been insufficiently demonstrated. Active referral from NEP to OAT is effective when it comes to long-term retention and reduction of substance use while in treatment. Except from use of amphetamine, the use of other substances prior to OAT was not associated with treatment discontinuation. Further and in-depth analyses of baseline predictors are of importance for OAT retention.

Patient experiences of methadone treatment changes during the first wave of COVID-19: a national community-driven survey

BACKGROUND

During COVID-19, the Substance Abuse and Mental Health Services Administration (SAMHSA) allowed Methadone Maintenance Treatment (MMT) programs to relax in-person MMT requirements to reduce COVID-19 exposure. This study examines patient-reported changes to in-person methadone clinic attendance requirements during COVID-19.

METHODS

From June 7, 2020, to July 15, 2020, a convenience sample of methadone patients (N = 392) were recruited in collaboration with National Survivors Union (NSU) in 43 states and Washington D.C. through social media (Facebook, Reddit, Twitter, and Web site pop-ups). The community-driven research (CDR) online survey collected information on how patient take-home methadone dosing and in-person drug testing, counseling, and clinic visit frequency changed prior to COVID-19 (before March 2020) to during COVID-19 (June and July 2020).

RESULTS

During the study time period, the percentage of respondents receiving at least 14 days of take-home doses increased from 22 to 53%, while the percentage receiving one or no take-home doses decreased from 22.4% before COVID-19 to 10.2% during COVID-19. In-person counseling attendance decreased from 82.9% to 19.4%. While only 3.3% of respondents accessed counseling through telehealth before COVID-19, this percentage increased to 61.7% during COVID-19. Many respondents (41.3%) reported visiting their clinics in person once a week or more during COVID-19.

CONCLUSIONS

During the first wave of COVID-19, methadone patients report decreased in-person clinic attendance and increased take-home doses and use of telehealth for counseling services. However, respondents reported considerable variations, and many were still required to make frequent in-person clinic visits, which put patients at risk of COVID-19 exposure. Relaxations of MMT in-person requirements during COVID-19 should be consistently implemented and made permanent, and patient experiences of these changes should be explored further.

Evaluation of post-discharge engagement for emergency department patients with opioid use history who received telehealth recovery coaching services

BACKGROUND

In recent years, emergency departments (EDs) across the nation have implemented peer recovery coach (PRC) services to support patients who use opioids. The majority of such interventions discussed in the literature follow an in-person modality where PRCs engage patients directly at the ED bedside. However, the use of telehealth services in EDs is becoming more popular. These services connect PRCs with ED patients in real-time via secure communications technology, and very little is known about the service- and clinical-based outcomes with which they are associated. The current study sought to assess factors associated with successful post-discharge follow-up of patients with a history of opioid use who received PRC telehealth services while in the ED.

METHOD

Data come from records for 917 patients who engaged with a telehealth PRC one or more times (1208 total engagements) at 1 of 13 EDs within the same health system. A multilevel Poisson regression model was used to assess the degree to which variables predicted successful post-discharge follow-up, defined as the number of times a PRC successfully spoke with the patient each month after ED discharge.

RESULTS

At least one follow-up was successfully completed by a PRC for 23% of enrolled patients. Significant predictors of successful follow-up included patient employment at baseline (Incidence Rate Ratio [IRR]: 2.8, CI: 2.05-3.9), living in a rural area (IRR: 1.8, CI: 1.04-3.2), PRC provision of referrals (IRR: 1.7, CI: 1.2-2.2), number of ED encounters in the previous 365 days (IRR: 0.99, CI: 0.98-0.99), and duration of the initial PRC telehealth interaction (IRR: 0.87, CI: 0.85-0.88).

CONCLUSION

Given that relationship development is a key tool in the PRC profession, understanding successful follow-up associated with telehealth engagement has unique importance. The results have potential utility for planning and implementing peer telehealth services in EDs and other locations, which is needed for the development of the PRC profession and the likely expansion of peer telehealth services.

Factors associated with counselling adherence in opioid treatment programs

Federally certified opioid treatment programs (OTPs) provide psychosocial counselling in addition to medications for opioid use disorder (MOUDs) using a patient-centered approach in providing substance use disorder treatment. This study explored factors associated with patients' adherence to counselling while receiving MOUD at an OTP. A retrospective cohort design using data on adult patients (n = 1151, 61% females, 39% males) admitted to an OTP from July 1, 2014, to June 30, 2016, was employed. The data were for single episodes of care up to 52 weeks. Survival analysis (cox proportional hazards regression) assessed the relationship of personal characteristics, socio-economic status, payment for services, type of substance use, comprehensive care and social support with counselling for up to a year. Results indicated that age, having services paid for by public means, was associated with counselling adherence. Primary heroin use patients had a higher risk of counselling adherence failure than patients who primarily used non-medicinal prescription substances. Treatment agencies may benefit from funding and using evidence-based practices for primary heroin use patients and young adults to better engage and retain these populations in treatment.

Cumulative barriers to retention in methadone treatment among adults from rural and small urban communities

Background

Though methadone has been shown to effectively treat opioid use disorder, many barriers prevent individuals from accessing and maintaining treatment. Barriers are prevalent in less populated areas where treatment options are limited. This study examines barriers to retention in methadone treatment in a small Midwest community and identifies factors associated with greater endorsement of barriers.

Methods

Patients at an opioid treatment program (N = 267) were recruited to complete a computer-based survey onsite. Surveys assessed demographics, opioid misuse, depression and anxiety symptoms, trauma history and symptoms, social support, and barriers to retention in treatment (e.g., childcare, work, housing, transportation, legal obligations, cost, health). Descriptive statistics were used to examine individual barriers and multiple regression was calculated to identify demographic and psychosocial factors associated with greater cumulative barriers.

Results

Most participants reported at least one barrier to retention in treatment and more than half reported multiple barriers. Travel hardships and work conflicts were the most highly endorsed barriers. Past year return to use (B = 2.31, p = 0.004) and more severe mental health symptomology (B = 0.20, p = 0.038) were associated with greater cumulative barriers. Greater levels of social support were associated with fewer barriers (B = − 0.23, p < 0.001).

Conclusion

This study adds to the limited research on barriers to retention in methadone treatment among patients in rural and small urban communities. Findings suggest flexible regulations for dispensing methadone, co-location or care coordination, and family or peer support programs may further reduce opioid use and related harms in small communities. Individuals with past year return to use reported a greater number of barriers, highlighting the time following return to use as critical for wraparound services and support. Those with co-occurring mental health issues may be vulnerable to poor treatment outcomes, as evidenced by greater endorsement of barriers. As social support emerged as a protective factor, efforts to strengthen informal support networks should be explored as adjunctive services to methadone treatment.

Stage-of-change Assessment Predicts Short-term Treatment Engagement for Opioid Use Disorder Patients Initiated on Buprenorphine

Introduction

The emergency department (ED) is an effective setting for initiating medication for opioid use disorder (MOUD); however, predicting who will remain in treatment remains a central challenge. We hypothesize that baseline stage-of-change (SOC) assessment is associated with short-term treatment retention outcomes.

Methods

This is a longitudinal cohort study of all patients enrolled in an ED MOUD program over 12 months. Eligible and willing patients were treated with buprenorphine at baseline and had addiction medicine specialist follow-up arranged. Treatment retention at 30 and 90 days was determined by review of the Prescription Drug Monitoring Program. We used uni- and multivariate logistic regression to evaluate associations between patient variables and treatment retention at 30 and 90 days.

Results

From June 2018–May 2019, 279 patients were enrolled in the ED MOUD program. Of those patients 151 (54.1%) and 120 (43.0%) remained engaged in MOUD treatment at 30 and 90 days, respectively. The odds of treatment adherence at 30 days were significantly higher for those with advanced SOC (preparation/action/maintenance) compared to those presenting with limited SOC (pre-contemplation/contemplation) (60.0% vs 40.8%; odds ratio 2.18; 95% confidence interval 1.15 to 4.1; P <0.05). At 30 days, multivariate logistic regression determined that advanced SOC, age >40, having medical insurance, and being employed were significant predictors of continued treatment adherence. At 90 days, advanced SOC, non-White race, age > 40, and having insurance were all significantly associated with higher likelihood of treatment engagement.

Conclusion

Greater stage-of-change was significantly associated with MOUD treatment retention at 30 and 90 days post index ED visit.

Twelve-month Treatment Retention and Associated Factors: A Comparison of 2 Medically Assisted Therapy Clinics in Dar es Salaam, Tanzania

OBJECTIVES

Retention in methadone maintenance treatment is instrumental in achieving better treatment outcomes. In this study, we compared 2 medication-assisted treatment (MAT) clinics in Dar es Salaam, Tanzania with respect to patient characteristics, outcomes, and factors that predict 12-month treatment retention.

METHODS

This retrospective registry-based cohort study utilized data collected for routine clinical and program monitoring at 2 sites, Mwananyamala and Muhimbili MAT clinics. Cumulative retention in treatment was calculated using life tables. The analysis of treatment retention predictor variables used both Kaplan-Meier and Cox proportional hazard analyses.

RESULTS

We examined the socio-demographic and program-related characteristics of 362 (181 from each clinic) patients. Twelve-month treatment retention was higher at Mwananyamala (73%) than Muhimbili (64%) MAT clinic, but the difference was not significant. In both clinics, a higher methadone dose (>60 mg) significantly predicted treatment retention (P < 0.05). Being employed and traveling an average short distance (<5 km) from home to clinic significantly increased the likelihood of remaining in treatment in Muhimbili MAT clinic (P  < 0.05) only.

CONCLUSIONS

A methadone dose of 60 mg and above was associated with longer retention in treatment. At 1 clinic in a denser and more central location, employment and a short travel distance from home to clinic were associated with longer tenure in treatment. These findings have potential implications for clinical practice, research, and scaling up MAT services in Tanzania.

Substance of choice, impact of heroin or opium on treatment retention in a multicentre randomised controlled trial in Iran

INTRODUCTION

In the Middle East and Asia, illicit opioid use exists across a spectrum between heroin and opium. The impact of primary opioid of choice on opioid agonist treatment retention has not been well evaluated previously, especially for opium tincture, an increasingly popular form of opioid agonist treatment in Iran. This study investigates the relationship between primary opioid of choice, namely heroin or opium, and retention in opium tincture and methadone treatment.

METHODS

Participants with opioid use disorder (n = 204) were randomised to receive opium tincture or methadone. All participants were categorised as mainly using opium or heroin. Bivariate analyses between treatment retention and primary opioid of choice (P < 0.05) and logistic regression were conducted.

RESULTS

Among the 191 participants included in this analysis, heroin was the primary substance of choice for 135 participants (70.7%) and opium for 56 (29.3%). Bivariate analysis showed that the opium group was more likely to be satisfied with family situation, employed and retained in treatment than the heroin group while less likely to experience incarceration and use multiple substances. When adjusting for covariates, primary opioid of choice was not significantly associated with retention in either methadone or opium tincture treatment arm.

DISCUSSION AND CONCLUSIONS

Positive factors, such as employment, housing and family support, seem to collectively explain the higher retention in treatment among those who primarily use opium compared to those who use heroin. To optimise retention in opioid agonist treatment, biopsychosocial care models should be further evaluated to improve psychosocial functioning.

Mental health and use of health care services in opioid-exposed school-aged children compared to foster children

Given the concerns raised regarding the effects of prenatal exposure to methadone and buprenorphine on the developmental outcomes of the children, this study assessed mental health and use of services in a national sample of school-aged children (N = 78) born to women enrolled in opioid maintenance treatment during pregnancy, compared with a group of foster children (N = 140). The majority of the opioid-exposed children lived with their birth parent(s) at the time of assessment (N = 62), while 16 lived in foster homes. Caregivers completed the Strengths and Difficulties Questionnaire (SDQ) and the Reactive Attachment Disorder scale. Teachers completed the SDQ. Three kinds of services were included in measuring service use: school-based education services, child mental health services, and hospital-based habilitation services. The main finding of the study is that children prenatally exposed to methadone or buprenorphine living with their family of origin had significantly better mental health status than their foster-placed counterparts and that of the comparison group of foster children. In addition, the exposed children living at home had less child welfare involvement, and only half of them were using any of the three services measured. The odds for using services increased significantly in accordance with increasing mental health problems, independent of group affiliation, indicating a need-based access to services. In line with other studies, we found that the odds for using one or more services was 2.3 times greater for boys than for girls. Our results contribute to a more-nuanced understanding of the developmental outcomes of prenatal exposure to methadone and buprenorphine, and factors associated with increased service use in groups of at-risk children.

Drug induced homicide laws may worsen opioid related harms: An example from rural North Carolina

Drug-induced homicide (DIH) laws typically allow for the prosecution of drug distribution resulting in an overdose fatality as equivalent to homicide or manslaughter. Despite vigorous debate about the appropriateness of DIH laws as a response to overdose, the public health impacts of this increasingly common prosecutorial strategy remain unknown. In this policy analysis, we take up the question of how DIH prosecutions impact local persons and communities through the lens of a high-profile DIH conviction that took place in Haywood County, a rural county located in the Appalachian region of western North Carolina. Describing insights gained from two unrelated but overlapping studies carried out in Haywood County, we identify several plausible mechanisms through which DIH laws may negatively impact public health. Among these are disruptions to the local drug market and deterrence from calling 911 when witnessing an overdose. With the number of DIH prosecutions growing rapidly, more research on the public health impacts of DIH laws is urgently needed.

Who stays in medication treatment for opioid use disorder? A national study of outpatient specialty treatment settings

BACKGROUND

Maintenance treatments with medications for opioid use disorder (MOUD) are highly effective at reducing overdose risk while patients remain in care. However, few patients initiate medication and retention remains a critical challenge across settings. Much remains to be learned about individual and structural factors that influence successful retention, especially among populations dispensed MOUD in outpatient settings.

METHODS

We examined individual and structural characteristics associated with MOUD treatment retention among a national sample of adults seeking MOUD treatment in outpatient substance use treatment settings using the 2017 Treatment Episode Dataset-Discharges (TEDS-D). The study assessed predictors of retention in MOUD using multivariate logistic regression and accelerated time failure models.

RESULTS

Of 130,300 episodes of MOUD treatment in outpatient settings, 36% involved a duration of care greater than six months. The strongest risk factors for treatment discontinuation by six months included being of younger age, ages 18-29 ((OR):0.52 [95%CI:0.50-0.54]) or 30-39 (OR:0.57 [95%CI:0.55-0.59); experiencing homelessness (OR: 0.70 [95%CI:0.66-0.73]); co-using methamphetamine (OR:0.48 [95%CI:0.45-0.51]); and being referred to treatment by a criminal justice source (OR:0.55 [95%CI:0.52-0.59) or by a school, employer, or community source (OR:0.71 [95%CI:0.66-0.76).

CONCLUSIONS

Improving retention in treatment is a pivotal stage in the OUD cascade of care and is critical to reducing overdose deaths. Efforts should prioritize interventions to improve retention among patients who are both prescribed and dispended MOUD, especially youth, people experiencing homelessness, polysubstance users, and people referred to care by the justice system who have especially short stays in care.

Changes in methadone program practices and fatal methadone overdose rates in Connecticut during COVID-19

BACKGROUND

Due to the COVID-19 pandemic, the Substance Abuse and Mental Health Services Administration (SAMHSA) has relaxed restrictions on methadone treatment in the United States. There is concern that the relaxation may increase fatal overdose rates. This study examines opioid treatment program (OTP) changes to methadone treatment during COVID-19 and changes in fatal methadone-involved overdose rates in Connecticut.

METHODS

From July 8th to August 18th, 2020, we conducted a comprehensive state-wide survey of all eight OTPs that dispense methadone in Connecticut to examine programmatic changes during COVID-19. We also analyzed state-level data on confirmed accidental opioid-involved deaths to assess if relaxation of take-home dosing restrictions and in-person attendance requirements correlated with increased methadone-involved fatal overdose rates.

RESULTS

OTPs reported implementing multiple changes to methadone treatment in response to the COVID-19 pandemic. The percent of patients receiving 28-day take-home doses increased from 0.1% to 16.8%, 14-day take-home doses increased from 14.2% to 26.8%, and the percent receiving one or no take-home doses decreased from 37.5% to 9.6%. Monthly or more frequent drug testing decreased from 15% to 4.6% and 75.2% of individual counseling for methadone patients transitioned to telehealth. However, changes to methadone treatment varied considerably by program. OTP providers said restrictions on methadone should be relaxed and increases in take-home dosing as well as telehealth should be continued in non-pandemic situations. Methadone-involved fatalities relative to other opioid-involved fatalities did not increase in Connecticut following changes in OTP practices.

CONCLUSIONS

Connecticut OTPs relaxed methadone treatment requirements during COVID-19. Since relaxing restrictions on methadone treatment has not increased fatal overdoses, we recommend that the reductions in-person dosing and attendance requirements implemented during the COVID-19 pandemic should be continued and made permanent.

Incidence and factors associated with discontinuation of opioid agonist therapy among people who inject drugs in Australia

AIMS

To estimate incidence and predictors of opioid agonist therapy (OAT) discontinuation in a national cohort of people who inject drugs (PWID).

DESIGN AND SETTING

Annually repeated cross-sectional serosurveillance among PWID attending ~50 needle-syringe programmes across Australia.

PARTICIPANTS

Between 1995 and 2018, 2651 PWID who reported current OAT and had subsequent survey participation completed 6739 surveys. Respondents were followed over 11 984 person-years of observation (PYO). Respondents were predominantly male (60%), and the median age was 34 years. Heroin was the most commonly reported drug last injected (46%), and methadone was the most commonly prescribed OAT (77%).

MEASUREMENTS

The primary outcome was discontinuation of OAT (methadone, buprenorphine or buprenorphine-naloxone). Among respondents who reported current OAT, those who did not report current OAT in all subsequent records were defined as discontinued, and those with current OAT at all subsequent records were defined as retained. Predictors of discontinuation included self-reported demographic (sex, location, Indigenous status) and drug use characteristics (drug last injected, frequency of injection).

FINDINGS

Just fewer than one-third of respondents (29%) reported an OAT discontinuation event. The crude discontinuation rate was 6.3 [95% confidence intervals (CI) = 5.9-6.8] per 100 PYO. Discontinuation was significantly higher among respondents who reported last injecting pharmaceutical opioids [adjusted hazard ratio (aHR) = 1.75, 95% CI = 1.41-2.17, P < 0.001], being prescribed buprenorphine (aHR = 1.44, 95% CI = 1.18-1.76, P = 0.001) or buprenorphine-naloxone (aHR = 1.68, 95% CI = 1.20-2.34, P = 0.002), daily or more frequent injection (aHR = 1.51, 95% CI = 1.23-1.85, P < 0.001), recent public injecting (aHR = 1.37, 95% CI = 1.17-1.60, P < 0.001), incarceration in the previous 12 months (aHR = 1.31, 95% CI = 1.05-1.64, P = 0.017), recent receptive syringe or injection equipment sharing (aHR = 1.28, 95% CI = 1.10-1.48, P = 0.001) and male sex (aHR = 1.27, 95% CI = 1.09-1.47, P = 0.002).

CONCLUSION

People who inject drugs attending needle-syringe programmes in Australia appear to be significantly more likely to discontinue opioid agonist treatment if they were prescribed buprenorphine or buprenorphine-naloxone compared with methadone, are male or report injection risk behaviours and recent incarceration.

Retention in the Austrian opioid agonist treatment system: a national prospective cohort study

BACKGROUND

Retention in care is a prerequisite for successful recovery, especially for a chronic condition like opioid dependence. Though retention varies greatly depending on the different substitution medication and treatment model, treatment retention is used as an indicator of treatment quality and effectiveness of care on a system and individual level. To monitor the overall quality of the Austrian opioid agonist treatment (OAT) system and to monitor patient satisfaction within the system, a new online-based registry called "eSuchmittel" was introduced in Austria at the beginning of 2011. The objective of this study is to analyze retention rates within the Austrian treatment system and to identify patient characteristics associated with retention, using data collected by the substitution registry.

METHODS

The complete Austrian sample of 4778 registered patients starting treatment between 1.1.2011 to 31.12.2012 were included in the prospective cohort study using data from the Austrian substitution registry. For the statistical analysis, multivariate Cox Regression and Kaplan-Meier survival analysis were used to evaluate retention in treatment.

RESULTS

The retention rate of the total cohort after two years was around 61%. Retention rates were significantly lower for men (exp(B) = .806, 95% CI 0.714-0.908) and significantly higher for patients aged 30 and older (exp(B) = 1.155, 95% CI 1.044-1.279), among patients located in Vienna (exp(B) = 1.439, 95% CI 1.273-1.626) and among patients prescribed oral slow-release morphine (SROM) (exp(B) = 2.141, 95% CI 1.885-2.430).

CONCLUSIONS

Average retention in the Austrian system is high in comparison to international retention rates. Nationally, SROM demonstrates higher treatment retention when compared to other available substitution medications. Sociodemographic and regional indicators also contribute to higher retention in care. A systematic monitoring of retention rates within a national registry is an important tool helping to evaluate the quality of care. In this study, the Austrian OAT system proves very high retention in care, an important success criterion.

Pharmacotherapy for Attention-Deficit/Hyperactivity Disorder and Retention in Outpatient Substance Use Disorder Treatment: A Retrospective Cohort Study

OBJECTIVE

To assess the relationship between short- and longer-term retention in outpatient substance use disorder (SUD) treatment and pharmacotherapy for comorbid attention-deficit/hyperactivity disorder (ADHD).

METHODS

In this retrospective cohort study conducted in a single addiction psychiatry clinic, electronic health record data from July 14, 2014, through January 15, 2020, were queried for clinical ADHD diagnosis (DSM-5 criteria), ADHD pharmacotherapy, treatment duration, demographic variables, comorbid psychiatric and SUD diagnoses, and buprenorphine therapy. Individuals with ADHD (n = 203) were grouped by ADHD pharmacotherapy status (171 receiving medication compared to 32 receiving none). Kaplan-Meier and Cox proportional hazards regression analyses were performed and assessed for significance.

RESULTS

ADHD was clinically diagnosed in 9.4% of outpatients and was associated with younger age, comorbid cocaine use, and private insurance (P < .001). Individuals receiving no ADHD pharmacotherapy were younger than those receiving medication (P = .003). Compared to no ADHD medication, ADHD pharmacotherapy was associated with greater long-term retention, with apparent group half-lives of 9 months and 36 months, respectively (P < .001). Individuals receiving no ADHD medication had a 4.9-fold increased likelihood of attrition within 90 days (P = .041). Regression analysis showed only ADHD pharmacotherapy to be significantly associated with treatment retention (hazard ratio = 0.59; 95% CI, 0.40-0.86; P = .008).

CONCLUSIONS

ADHD pharmacotherapy is robustly associated with improved short- and longer-term retention in outpatient SUD treatment. The retrospective, nonrandomized naturalistic study design limits causal inference. Further studies addressing unmeasured covariates and associated risks of treatment in adults with ADHD and SUD are necessary.

Factors associated with early and later dropout from methadone maintenance treatment in specialist addiction clinics: a six-year cohort study using proportional hazards frailty models for recurrent treatment episodes

BACKGROUND

Retention in methadone maintenance treatment (MMT) is associated with reduced illicit drug use, criminal activity, and mortality; however, many clients move in and out of MMT. This study aims to identify determinants of time to dropout of MMT across multiple treatment episodes in specialist addiction services in Ireland.

METHODS

Cohort study of persons attending specialist addiction clinics between 2010 and 2015. MMT episodes were periods of continuous treatment if there were no interruptions to treatment lasting > 7days. Proportional hazards frailty models were used to assess factors associated with time to dropout from recurrent MMT episodes at 3 (90 days) and 12 months (91-365 days). MMT episodes were right- censored at time of death, transfer to prison or primary care, and study end.

RESULTS

A total of 2,035 individuals experienced 4,969 MMT episodes, with 2,724 dropout events during the six-year follow-up. Factors associated with dropout at 3 months included low dose methadone (<60 mg/day) (HR = 1.49, 95% CI 1.29-1.73) and previous dropout (HR = 1.65, 95% CI 1.41-1.92). Adherence was protective (HR = 0.91, 95% CI 0.90-0.92). Dropout at 12 months was associated with low dose methadone (HR = 1.44, 95% CI 1.23-1.68), previous dropout (HR = 1.37, 95% CI 1.16-1.61), males (HR 1.26, 95% CI 1.06-1.50), benzodiazepines (HR = 1.22, 95% CI 1.03-1.45) and number of comorbidities (HR = 1.12, 95% CI 1.05-1.20); adherence was protective (HR = 0.86, 95% CI 0.84-0.87).

CONCLUSIONS

Clients with a previous history of treatment dropout and those on low dose methadone should be identified as high risk for both early and later dropout. Inversely, adherence to treatment, not missing methadone doses, is protective.

A facilitation model for implementing quality improvement practices to enhance outpatient substance use disorder treatment outcomes: a stepped-wedge randomized controlled trial study protocol

Background

The misuse of and addiction to opioids is a national crisis that affects public health as well as social and economic welfare. There is an urgent need for strategies to improve opioid use disorder treatment quality (e.g., 6-month retention). Substance use disorder treatment programs are challenged by limited resources and a workforce that does not have the requisite experience or education in quality improvement methods. The purpose of this study is to test a multicomponent clinic-level intervention designed to aid substance use disorder treatment clinics in implementing quality improvement processes to improve high-priority indicators of treatment quality for opioid use disorder.

Methods

A stepped-wedge randomized controlled trial with 30 outpatient treatment clinics serving approximately 2000 clients with opioid use disorder each year will test whether a clinic-level measurement-driven, quality improvement intervention, called Coaching for Addiction Recovery Enhancement (CARE), improves (a) treatment process quality measures (use of medications for opioid use disorder, in-treatment symptom and therapeutic progress, treatment retention) and (b) recovery outcomes (substance use, health, and healthcare utilization). The CARE intervention will have the following components: (1) staff clinical training and tools, (2) quality improvement and change management training, (3) external facilitation to support implementation and sustainability of quality improvement processes, and (4) an electronic client-reported treatment progress tool to support data-driven decision making and clinic-level quality measurement. The study will utilize multiple sources of data to test study aims, including state administrative data, client-reported survey and treatment progress data, and staff interview and survey data.

Discussion

This study will provide the field with a strong test of a multicomponent intervention to improve providers’ capacity to make systematic changes tied to quality metrics. The study will also result in training and materials that can be shared widely to increase quality improvement implementation and enhance clinical practice in the substance use disorder treatment system.

Trial registration

Trial #NCT04632238NCT04632238 registered at clinicaltrials.gov on 17 November 2020

Reducing Risky Drug Use Behaviors by Enrolling Syringe Exchange Registrants in Methadone Maintenance

Referral of syringe exchange registrants with opioid use disorder to agonist treatment provides a pathway to further reduce drug use risk behaviors. Objective: This study evaluates the drug use risk reduction benefits of enrolling syringe exchange registrants in methadone maintenance, and the impact of continued illicit drug use on risk reduction. Method: Baltimore Needle Exchange Program (BNEP) registrants (n = 210) participated in a parent study evaluating treatment initiation strategies for methadone maintenance and were followed for six months. The Risk Assessment Battery (RAB; Metzger, 1993) was administered monthly to evaluate drug use risks; urinalysis testing was conducted weekly. Results: Treatment enrollment reduced drug use risk behaviors, and longer treatment episodes resulted in additional, though modest, risk reduction. Use of opioids or cocaine in treatment diminished risk-reduction benefits, though drug use risks declined over time and remained well below baseline levels. Conclusions: These findings demonstrate that methadone maintenance enhances the well-known risk-reduction benefits of syringe exchange participation. Improving coordination between syringe exchanges and treatment facilities may enhance the public health.

Developing a community-supported risk reduction intervention for syringe exchange registrants and their drug-free family or friends: a pilot study

BACKGROUND

People engaged in injection opioid use often have drug-free family or friends that could be mobilized to support risk reduction and treatment seeking.

OBJECTIVE

This pilot study evaluated the feasibility and preliminary efficacy of a 6-week community-supported risk reduction group intervention for syringe exchange program (SEP) registrants and drug-free network members.

METHOD

The group provided risk reduction and treatment readiness education, with weekly assignments for participants to engage together in community activities designed to meet other drug-free people.

RESULTS

Thirty-nine SEP registrants (and 39 community supports) enrolled in the study, and 21 pairs attended at least one group. For this smaller sample, participants attended 67% of scheduled sessions and engaged in scheduled activities during 42% of the study weeks, with 48% of SEP participants (n = 10) choosing to enter substance use disorder treatment. SEP participants who entered treatment reported reduced rates of injection drug use, opioid use, and cocaine use.

CONCLUSIONS

While this intervention shows promise for linking syringe exchange and substance use disorder treatment participation in select SEP registrants, outcomes demonstrating low demand and modest acceptability suggest that additional research is necessary to understand barriers to participation and motivate higher levels of engagement.

Substance misuse and community supervision: A systematic review of the literature

A narrative systematic review was undertaken of the literature concerning the health of people on probation or parole (community supervision). In this paper, we provide an up-to-date summary of what is known about substance misuse in this context. This includes estimates of the prevalence and complexity of substance misuse in those under community supervision, and studies of the effectiveness of approaches to treating substance misuse and engaging and retaining this population in treatment. A total of 5125 papers were identified in the initial electronic searches, and after careful double-blind review only 31 papers related to this topic met our criteria. In addition, a further 15 background papers were identified which are reported. We conclude that internationally there is a high prevalence and complexity of substance misuse amongst people under community supervision. Despite clear benefits to individuals and the wider society through improved health, and reduced re-offending; it is still difficult to identify the most effective ways of improving health outcomes for this group in relation to substance misuse from the research literature. Further research and investment is needed to support evidence-based commissioning by providing a detailed and up-to-date profile of needs and the most effective ways of addressing them, and sufficient funds to ensure that appropriate treatment is available and its impact can be continually measured. Without this, it will be impossible to truly establish effective referral and treatment pathways providing continuity of care for individuals as they progress through, and exit, the criminal justice pathway.

Non-Opioid Treatments for Opioid Use Disorder: Rationales and Data to Date

Opioid use disorder (OUD) represents a major public health problem that affects millions of people in the USA and worldwide. The relapsing and recurring aspect of OUD, driven by lasting neurobiological adaptations at different reward centres in the brain, represents a major obstacle towards successful long-term remission from opioid use. Currently, three drugs that modulate the function of the opioidergic receptors, methadone, buprenorphine and naltrexone have been approved by the US Food and Drug Administration (FDA) to treat OUD. In this review, we discuss the limitations and challenges associated with the current maintenance and medication-assisted withdrawal strategies commonly used to treat OUD. We further explore the involvement of glutamatergic, endocannabinoid and orexin signaling systems in the development, maintenance and expression of addiction-like behaviours in animal models of opioid addiction, and as potential and novel targets to expand therapeutic options to treat OUD. Despite a growing preclinical literature highlighting the role of these potential targets in animal models of opioid addiction, clinical and translational studies for novel treatments of OUD remain limited and inconclusive. Further preclinical and clinical investigations are needed to expand the arsenal of primary treatment options and adjuncts to maximise efficacy and prevent relapse.

Motivations for Treatment Engagement in a Residential Substance Use Disorder Treatment Program: A Qualitative Study

AIMS

The aim of this study was to explore perspectives on motivations for treatment engagement from substance use disorder (SUD) clients in a long-term residential rehabilitation program.

DESIGN AND METHODS

A convenience sample of 30 clients who were enrolled in a year-long SUD treatment program at a residential rehabilitation facility took part in in-depth interviews. Interview transcripts were analyzed using the directed content analysis approach.

RESULTS

Participant accounts indicated that their treatment engagement was motivated by factors that aligned with the six primary constructs of the Health Belief Model: (i) perceived susceptibility (eg, believing that their substance use required intervention and that they were prone to relapse), (ii) perceived severity (eg, substance use negatively impacted their health and harmed their close relationships), (iii) perceived benefits (eg, opportunities for a better life, reconnecting with family members and close friends, & avoiding legal consequences), (iv) perceived barriers (eg, the length of the treatment program), (v) cues to actions (eg, decisive moments, elements of the treatment program, & faith and spirituality), and (vi) self-efficacy in remaining abstinent (eg, treatment program provided them with skills and experiences to maintain long-term sobriety).

DISCUSSION

Our analysis indicates that participants' treatment engagement was linked to their beliefs regarding the severity of their substance use disorder, their treatment program's ability to help them avoid future relapse, and their own capability to act upon the strategies and resources provided by the treatment program. A theoretical understanding of these aspects can contribute to the future planning of precision interventions.

Patient Satisfaction with Substance Use Disorder Rehabilitation Services: a Qualitative Study

Despite its recognized value, there is a gap in the assessment of patient satisfaction among patients with substance use disorder (SUD) in rehabilitation. The study objective was to determine patient satisfaction dimensions relevant to individuals receiving residential rehabilitation for SUD. Semi-structured interviews were conducted with the following: (1) adult males enrolled in the program and (2) counseling staff involved in the care of these individuals. A literature review formed the basis for interviews, which were audio recorded and transcribed. Text data was analyzed using directed content analysis to identify dimensions relevant to patient satisfaction. Eighteen individuals participated, including 14 men with SUD and four staff. Content analysis of the interview transcripts resulted in five themes: (1) counselor (skill), (2) programmatic structure (adhering), (3) skill development (personal responsibility), (4) comparison to other programs, and (5) case management facilitation. These dimensions will be utilized to create a patient satisfaction tool specific to SUD rehabilitation.

Retention of patients in opioid substitution treatment: A systematic review

Background

Retention in opioid substitution (OST) treatment is associated with substantial reductions in all cause and overdose mortality. This systematic review aims to identify both protective factors supporting retention in OST, and risk factors for treatment dropout.

Methods

A systematic search was performed using MEDLINE, Embase, PsycInfo, CINAHL and Web of Science (January 2001 to October 2019). Randomised controlled trials (RCTs) and observational cohort studies reporting on retention rates and factors associated with retention in OST were included. Factors associated with treatment retention and dropout were explored according to the Maudsley Addiction Profile. A narrative synthesis is provided.

Results

67 studies were included in this review (4 RCTs and 63 observational cohort studies; N = 294,592), all assessing factors associated with retention in OST or treatment dropout. The median retention rate across observational studies was approximately 57% at 12 months, which fell to 38.4% at three years. Studies included were heterogeneous in nature with respect to treatment setting, type of OST, risk factor assessment, ascertainment of outcome and duration of follow-up. While the presence of such methodological heterogeneity makes it difficult to synthesise results, there is limited evidence to support the influence of a number of factors on retention, including age, substance use, OST drug dose, legal issues, and attitudes to OST.

Conclusions

Younger age, substance use particularly cocaine and heroin use, lower doses of methadone, criminal activity/incarceration, and negative attitudes to MMT appear to be associated with reduced retention in OST. A consensus definition of retention is required to allow for comparability across future studies.

Interaction effects in the association between methadone maintenance therapy and experiences of racial discrimination in U.S. healthcare settings

BACKGROUND

Disparities in methadone maintenance therapy (MMT) outcomes have received limited attention, but there are important negative outcomes associated with MMT that warrant investigation. Racial discrimination is common in healthcare settings and affects opioid use disorder (OUD) treatment and comorbidities. However, race/ethnicity alone may not fully explain experiences of discrimination. MMT remains highly stigmatized and may compound the effect of race/ethnicity on discrimination in healthcare settings. We sought to quantify differential associations between MMT and experiences of racial discrimination between racial/ethnic groups in a U.S. national sample.

METHODS

We used the National Epidemiologic Survey on Alcohol and Related Conditions-III (2012-2013) to identify a subset of individuals with a lifetime OUD who had ever used MMT (survey n = 766; weighted population n = 5,276,507). We used multivariable logistic regression to model past-year experience of racial discrimination in a healthcare setting. We included an interaction term between race/ethnicity and MMT status to identify the odds of discrimination (MMT vs. no MMT [referent]) within racial/ethnic groups. We used survey procedures with weights to account for the parent study's complex survey design.

FINDINGS

Twenty-two percent of our sample experienced racial discrimination in a healthcare setting in the past year. Discrimination was more common among those who had ever used MMT (x2 = 10.00, p = 0.001) and racial/ethnic minorities (x2 = 23.15, p<0.001). The interaction effect was much stronger than the main effects of race/ethnicity and MMT status. MMT status (versus no MMT) was positively associated with discrimination among Blacks (aOR = 3.93, 95% CI = 3.87-3.98, p<0.001), Whites (aOR = 2.25, 95% CI = 2.23-2.27, p<0.001), and Latino/Latinas (aOR = 1.59, 95% CI = 1.55-1.62, p<0.001). Among American Indian/Alaska Natives (AI/AN), those who had used MMT had over thirty times the odds of racial discrimination, compared to their non-MMT counterparts (aOR = 32.78, 95% CI = 31.16-34.48, p<0.001).

CONCLUSION

Race/ethnicity alone did not sufficiently account for racial discrimination in healthcare settings among those with a lifetime OUD. MMT status was strongly associated with racial discrimination among AI/AN. Our strong interaction effect is indicative of an additional barrier to health services utilization among AI/AN, which has important implications for OUD treatment outcomes and comorbidities. Health promotion programs aimed at increased adoption of MMT are promising, but should be considered in the context of racial/ethnic disparities, drug use and MMT stigma, and implicit biases in clinical settings.

Who Leaves Early? Factors Associated With Against Medical Advice Discharge During Alcohol Withdrawal Treatment

OBJECTIVE

To determine if certain patient, clinical, and disease factors are associated with against medical advice (AMA) discharge among patients admitted for treatment of alcohol withdrawal.

METHODS

Data from admissions to a dedicated unit for treatment of substance withdrawal were collected over a 6-month period. Patients with AMA and planned discharge were compared with regard to demographics, clinical data, and substance use disorder disease characteristics. A stepwise logistic regression was used to find the best model.

RESULTS

The study population included 655 patient encounters. A total of 93 (14%) discharges were AMA. Bivariate analysis showed patients with AMA discharge were younger (mean age 43 vs 46 years; P < 0.05), more likely to leave on a Tuesday to Thursday, and to have an initial withdrawal score at or above the median (AMA 69% vs planned 56%; P = 0.02). Emergency department (ED) admissions had an AMA discharge rate of 21% compared with 10% of community admissions (P < 0.05). Regression analysis found AMA discharge was significantly associated with admission from the ED (odds ratio [OR] 2.03, confidence interval [CI] 1.27-3.25) and younger age (OR 0.97, CI 0.95-0.99). There was no significant difference in discharge disposition among patients with concurrent opioid use disorder who were on opioid agonist therapy.

CONCLUSIONS

AMA discharges occurred in 1 of every 7 admissions. Being admitted from the ED and younger age was associated with AMA discharge. No other patient or clinical factors were found to be associated with AMA discharge.

Does Cannabis Use Influence Opioid Outcomes and Quality of Life Among Buprenorphine Maintained Patients? A Cross-sectional, Comparative Study

OBJECTIVES

Use of various psychoactive substances can influence outcomes of patients on opioid agonist treatment (OAT). While use of alcohol and cocaine has shown to adversely affect OAT results, associated cannabis use shows mixed results. This study aimed to assess the pattern of cannabis use among opioid-dependent patients maintained on buprenorphine. Additionally, the study compared the dose of buprenorphine, opioid-related craving and withdrawals, productivity, and also quality of life between those with and without recent (past 90-day) cannabis use.

METHODS

We collected data on demographic and drug use details in 100 randomly selected adult male patients attending a community drug treatment clinic, who were stabilized on buprenorphine for more than 3 months. Other measures included scores on World Health Organization (WHO)-Alcohol, Smoking and Substance Involvement Screening Tool and WHO-Quality of Life-Brief (WHOQOL-Bref) version.

RESULTS

The average duration of maintenance treatment with buprenorphine was 96 months, with excellent compliance for buprenorphine (86.92 ± 9.58 days in 90 days). Thirty-five per cent had used cannabis in past 90 days, with lifetime use of cannabis in 77%. Participants using cannabis currently were on lower doses of buprenorphine (mean dose per day: 7.9 mg vs 8.9 mg; P = 0.04). Yet, there was no significant difference in the rates of opioid use or opioid withdrawals and craving between the 2 groups. Compliance to OAT, number of days of employment, daily earning, and WHOQOL-Bref scores in all domains were comparable between those with and without cannabis use. Duration of cannabis use, current use of alcohol, and dose of buprenorphine predicted current cannabis use in multivariable logistic regression analysis.

CONCLUSIONS

Cannabis use does not negatively influence opioid outcomes among patients receiving buprenorphine maintenance treatment. There is no difference in productivity and quality of life between individuals maintained on buprenorphine with and without current cannabis use.

Cannabis use during methadone maintenance treatment for opioid use disorder: a systematic review and meta-analysis

BACKGROUND

Rates of cannabis use among patients receiving methadone maintenance therapy are high, and cannabis use may be associated with outcomes of methadone maintenance therapy. We examined the effect of cannabis use on opioid use in patients receiving methadone maintenance therapy to test the hypothesis that cannabis use is associated with a reduction in opioid use.

METHODS

In this systematic review, we searched MEDLINE/PubMed, Embase, PsycINFO, CINAHL and ProQuest Dissertations and Theses Global from inception to July 12, 2018. We summarized the effects of cannabis use on opioid use during methadone maintenance therapy and treatment retention. We conducted meta-analyses using a random effects model.

RESULTS

We included 23 studies in our review. We performed a meta-analysis of 6 studies, with a total number of participants of 3676, examining use of cannabis and opioids during methadone maintenance therapy. Owing to high heterogeneity, we described the studies qualitatively but provide the forest plots as supplemental material. The overall quality of evidence was very low, with a high risk of bias, owing to the nature of observational studies.

INTERPRETATION

We found no consensus among studies that cannabis use is associated with reduced opioid use or longer treatment retention when used during methadone maintenance therapy in patients with opioid use disorder. PROSPERO Registration: CRD42015029372.

A gender-based analysis of nonmedical prescription opioid use among people who use illicit drugs

BACKGROUND

Research investigating the unique impacts associated with engaging in nonmedical prescription opioid use (NMPOU) among males and females who also use illicit drugs is needed.

METHODS

Data were collected between 2013 and 2017 from two linked prospective cohort studies in Vancouver: the At-Risk Youth Study and Vancouver Injection Drug Users Study. Generalized estimating equations were used to identify factors associated with engaging in NMPOU among females and males separately.

RESULTS

Among 1459 participants, 534 were female (37%). Similar proportions of females (46%) and males (48%) engaged in NMPOU at their first visit during the study period. In multivariable analyses, factors associated with NMPOU among both males and females included heroin use, overdose, drug dealing, and difficulty accessing health and social services. Among females, those who engaged in NMPOU were more likely to report Caucasian or white ethnicity, cocaine use, crystal methamphetamine use, and sex work; among males, those who engaged in NMPOU were older, reported crack use and engaged in binge drug use (all p < 0.05).

CONCLUSION

The prevalence of NMPOU was similar among males and females who use illicit drugs in Vancouver, and NMPOU was independently associated with markers of vulnerability among both genders. Findings highlight the need for a comprehensive public health approach to address NMPOU that integrates overdose prevention and reversal services, employment opportunities, and better access to services for both women and men.

Feasibility and Effectiveness of Continuing Methadone Maintenance Treatment During Incarceration Compared With Forced Withdrawal

BACKGROUND

Methadone maintenance treatment (MMT) is underutilized in correctional settings, and those receiving MMT in the community often undergo withdrawal upon incarceration. Federal and state regulations present barriers to providing methadone in correctional facilities. For this investigation, a community provider administered methadone to inmates who had been receiving methadone prior to incarceration. We hypothesized that inmates continued on MMT would have improved behavior during incarceration and post-release.

METHODS

This open-label quasi-experimental trial (n = 382) compared MMT continuation throughout incarceration (n = 184) to an administrative control group (ie, forced withdrawal; n = 198) on disciplinary tickets and other program attendance during incarceration. Post-release, re-engagement in community-based MMT and 6-month recidivism outcomes were evaluated.

RESULTS

Inmates in the MMT continuation group versus controls were less likely to receive disciplinary tickets (odds ratio [OR] = 0.32) but no more likely to attend other programs while incarcerated. MMT continuation increased engagement with a community MMT provider within 1 day of release (OR  = 32.04), and 40.6% of MMT participants re-engaged within the first 30 days (vs 10.1% of controls). Overall, re-engagement in MMT was not associated with recidivism. However, among a subset of inmates who received MMT post-incarceration from the jail MMT provider (n = 69), re-engagement with that provider was associated with reduced risk of arrest, new charges, and re-incarceration compared with those who did not re-engage.

CONCLUSIONS

Results support interventions that facilitate continuity of MMT during and after incarceration. Engagement of a community provider is feasible and can improve access to methadone in correctional facilities.

Efficacy of Electroacupuncture Combined with Methadone Maintenance Therapy: A Case-Control Study

High compliance with methadone maintenance therapy (MMT) is crucial to successful opioid abstinence in addicts. However, MMT has numerous side effects, including reductions in quality of life and quality of sleep. Many studies have demonstrated that electroacupuncture relieves withdrawal symptoms in opioid addicts. The present study was a case-control study. From January 2015 to September 2016, 106 patients undergoing MMT at a medical center in central Taiwan were recruited and separated into an electroacupuncture treatment group and a control group. Electroacupuncture was performed for 15 minutes twice weekly for 4 weeks. The electroacupuncture treatment group was discovered to have improved quality of life, especially in terms of vitality and mental health. Although electroacupuncture did not significantly improve sleep quality, we found that sleep quality was significantly improved once methadone dosage had been reduced. Electroacupuncture can improve quality of life in patients undergoing MMT. If methadone dosage can be reduced and electroacupuncture can be employed, both sleep and life quality can be improved.

Spatial access to opioid treatment program and alcohol and cannabis outlets: analysis of missed doses of methadone during the first, second, and third 90 days of treatment

Background: The burden of access to opioid treatment programs (OTPs) may change as clients become eligible for take-home privileges. Our previous study showed clients who lived more than 10-miles away from an OTP were more likely to miss methadone doses during the first 30 days of treatment. Proximity to alcohol and cannabis outlets may also negatively influence treatment adherence.Objective: To examine the association between access to this OTP, alcohol and cannabis outlets, and the number of missed methadone doses during the first, second, and third 90 days of treatment.Methods: The number of missed methadone doses was calculated for 752, 689, and 584 clients who remained in treatment, respectively, for at least 3, 6, and 9 months (50% female). Distance between client's home and the OTP, alcohol, and cannabis outlets was measured. Generalized linear models were employed.Results: Shorter distance from a client's residence to the OTP was associated with a decreased number of missed methadone doses during the first 90 days of treatment. Shorter distance to the closest cannabis retail outlet was associated with an increased number of missed methadone doses during the first and second 90 days of treatment. Shorter distance to the closest off-premise alcohol outlet was associated with an increased number of missed methadone doses during the third 90 days of treatment.Conclusions: Improving spatial accessibility of OTPs are essential to ensure treatment opportunities are available for individuals so affected. Exploring to what extent residing in areas that facilitate alcohol and cannabis availability can influence treatment adherence is warranted.

Predictors of treatment participation rate of substance use disorders among Whites and African Americans

Low treatment participation impedes successful treatment completion and reduces treatment effectiveness. This study explored relationships among treatment participation rate and individuals' symptom severities and employment statuses. A sample of 106 individuals with substance use disorders was recruited for cross-sectional investigation. Individuals who were employed at baseline or had lower symptom severities of baseline alcohol, drug use, and psychiatric issues had significantly higher treatment participation rates. Service providers should pay more attention to individuals' symptom severities and employment to encourage treatment participation. Integrated interventions including vocational services and illness management and recovery intervention could be provided to reduce individuals' symptom severities and increase employability. Implications of participation in substance abuse treatment are discussed.

Multifaceted Quality Improvement Initiative Improves Retention in Treatment for Youth with Opioid Use Disorder

Supplemental Digital Content is available in the text.

Introduction:

There is a critical need to develop interventions that help adolescents and young adults with opioid use disorders (OUDs) connect with, engage in, and remain consistent with the treatment given that patients who develop long-term OUDs experience long-term medical and mental health sequelae.

Methods:

We implemented quality improvement (QI) processes to increase early engagement and 6-month retention within a medication-assisted treatment clinic for youth with OUDs. QI interventions included motivational interviewing (MI) staff training, implementation of reduced initial treatment requirements, reduction of access barriers to treatment, and enhancement of patient treatment motivation. We monitored the impact of the interventions via a p-chart.

Results:

A statistically significant shift was seen in the 6-month retention rate following both MI staff training and the use of reduced initial treatment requirements. Second visit return rate also experienced a statistically significant shift following transportation support and an incentive program.

Discussion:

Our data demonstrate that following MI staff training, reduced initial clinic requirements, transportation support, and utilization of an incentive program, the second visit return rate, and 6-month retention rate improved within an outpatient medication-assisted treatment clinic for youth with OUDs.

Treatment Retention Satisfaction, and Therapeutic Progress for Justice-Involved Individuals Referred to Community-Based Medication-Assisted Treatment

Background: Limited research has examined factors associated with medication-assisted treatment for justice-involved individuals. Objectives: The current study used a mixed-method design to examine the influence of client- and counselor-level factors on 90-day treatment retention, satisfaction, and progress for justice-involved individuals referred to medication-assisted treatment. Methods: The effects of co-occurring disorders (i.e., psychiatric symptoms, anxiety, depression), social functioning (i.e., social support, self-esteem), substance use severity, and treatment motivation on treatment retention, treatment satisfaction, and treatment progress while controlling for counselor-level variance were assessed through multilevel modeling. Results: Fewer co-occurring disorders and more social support were related to greater treatment satisfaction and progress. A higher level of treatment motivation was associated with greater treatment progress. Mediation of treatment satisfaction on the relationship between client-level factors and treatment progress also was tested. Depression was negatively associated with treatment satisfaction, which in turn led to lower ratings of treatment progress. Social support was positively correlated with treatment satisfaction, which in turn was positively correlated with treatment progress. The association of client substance use severity with treatment retention differed between counselors, so did the association of co-occurring disorders and treatment motivation with treatment satisfaction. Qualitative analyses that were derived from counselors' perception of factors relating to recovery success underscored the importance of integrated interventions, social support, treatment motivation, and therapeutic alliance, and their associations with treatment outcomes. Conclusions/Importance: The current findings highlight the importance of integrated treatment services, collaborating with community corrections, and teaching clients strategies for dealing with deviant peers as to facilitating recovery.

Gender-specific predictors of methadone treatment outcomes among African Americans at an urban clinic

Background: African American patients with opioid use disorder (OUD) have demonstrated poorer methadone maintenance treatment (MMT) outcomes compared with white patients. This issue is further complicated in urban settings, where African Americans experience high rates of poverty and publicly funded treatment. Despite interrelated factors that disadvantage African Americans, the literature focusing on this population is scant. To address this shortcoming, we conducted the first investigation of gender differences and gender-specific MMT outcome predictors among African Americans (or any racial minority population). This study provides gender-specific findings to improve African American MMT outcomes. Methods: We studied 211 African American patients (male: n = 137, 64.9%) at an urban, university-affiliated MMT clinic. We used existing intake data to assess baseline demographic, substance use, mental health, and interpersonal factors. Primary outcomes were 3-month drug⁺ (positive) urine drug screen (UDS) results and treatment retention. Results: Women were more likely (than men) to endorse histories of interpersonal violence, substance abuse in their social network, and mental health problems. Men reported a greater likelihood (than women) for early opioid-use onset and a lack of prior MMT. There were no gender differences in 3-month drug⁺ UDS or treatment retention. In multivariable analyses among women, no baseline factors predicted 3-month opioid⁺ UDS and physical abuse history predicted a higher proportion of 3-month cocaine⁺ UDS. Among men, primary injection opioid use and older age best predicted a higher proportion of 3-month cocaine⁺ UDS and parent substance abuse predicted shorter retention. In both gender-stratified analyses, higher proportions of 3-month opioid⁺ UDS and cocaine⁺ UDS predicted shorter retention. Conclusions: This study offers an analysis of gender differences in risk factors, MMT outcomes, and gender-specific predictors among African American patients. MMT clinics should tailor assessment and treatment protocols to address gender-specific needs.

Defining and Predicting Opioid and Cocaine Treatment Response

Background: Treatment with methadone is effective in reducing heroin use, HIV risk, and death; however, not all patients respond to treatment. Better outcomes may emerge with personalized treatment based on factors that influence treatment courses. Objectives: To investigate psychosocial variables contributing to treatment response, using a comprehensive definition of treatment response. Methods: Seventy participants seeking treatment for heroin and cocaine addiction completed up to 40 weeks of daily methadone. At week 22, we administered a semi-structured interview for DSM-IV symptoms. We defined opioid treatment responders as people still enrolled at 22 weeks, not meeting past 30-day criteria for DSM-IV opioid abuse or dependence or DSM-5 opioid use disorder, and providing ≥75% opioid-negative urine samples in the 30 days prior to week 22. The same criteria were applied to assess cocaine treatment response. Results: Sample was 71% male, 41% White, and averaged 39.4 ± 7.9 years old. Opioid treatment response was more likely in participants who had been employed over the past 3 years (OR: 8.1, 95% CI: 1.2-55) and less likely in those who spent more time on hobbies (OR: 0.45, 95% CI: 0.23-0.88). Cocaine treatment response was more likely in participants who had a good relationship with their father (OR: 5.3, 95% CI: 1.2-24) and less likely if positive for hepatitis C (OR: 0.15, 95% CI: 0.03-0.75). Conclusions: Pretreatment characteristics differentially predict treatment response for heroin and cocaine use. Similar research in diverse patient groups may aid in the development of personalized treatment combining biologic treatment with targeted psychosocial interventions.

The Role of Patient Payment Method in Premature Discharge from Methadone Maintenance Treatment

BACKGROUND

Premature discharge is a pervasive problem in methadone maintenance treatment (MMT), and is associated with numerous adverse outcomes. Although a number of demographic variables have consistently been found to impact MMT retention, method of payment has received considerably less attention. A notable limitation of prior work is that most studies classify all patients who leave treatment early, irrespective of reason, as treatment dropouts and fail to account for specific reasons.

OBJECTIVE

This study sought to determine whether method of payment for MMT services was associated with differential reasons for premature discharge.

METHODS

The sample was comprised of 4158 patients prematurely discharged from 33 MMT facilities located throughout the U.S. from 2009 to 2012. Patients were classified into two groups based on their method of payment: self-pay and insurance (largely Medicaid). Patients were studied through retrospective electronic chart review.

RESULTS

Binary logistic regression indicated that insurance patients who were prematurely discharged were significantly more likely to be discharged due to a program-initiated reason (administrative), while self-pay patients were more likely to be discharged due to a patient-initiated reason (against medical advice) after controlling for significant intake demographic and clinical covariates.

CONCLUSIONS

Further research is needed to determine whether insurance patients may require different supports in place compared to self-pay patients in order to improve compliance with program guidelines (e.g. behavioral contracts providing a detailed description of rules both at admission and throughout treatment with an emphasis on the potential consequences of noncompliance), and whether self-pay patients may benefit from motivational incentives and interventions to remain engaged in treatment.

Evidence-based treatment for opioid use disorders: A national study of methadone dose levels, 2011-2017

The nation's methadone maintenance treatment (MMT) programs play a central role in addressing the current opioid epidemic. Considerable evidence documents the treatment effectiveness of MMT and, in turn, the importance of adequate dosing to MMT's effectiveness. Yet, as recently as 2011, 41% of patients received doses below the level of 80 mg/day. Using survey data from a nationally representative sample of MMT programs in 2011 and 2017, we examine (1) the extent to which the nation's MMT programs are meeting evidence-based standards for methadone dose level and (2) characteristics of MMT programs that are associated with variation in performance. Our results show that 43% of MMT patients receive <80 mg/day in 2017, and 23% of methadone maintenance patients receive daily doses below 60 mg. Results from multivariate regression analysis of the 2017 survey data show that private for-profit and public organizations significantly under-dosed patients compared to private nonprofit providers. Under-dosing also was more common in programs that serve high proportions of African-American patients. These results are concerning because MMT remains the medication of choice for vulnerable patients with the most severe opioid use disorders, and for-profit providers treat a growing proportion of MMT patients.

Three-year retention in methadone opioid agonist treatment: A survival analysis of clients by dose, area deprivation, and availability of alcohol and cannabis outlets

OBJECTIVE

To determine the effect of clinical, socio-demographic, and contextual characteristics on treatment retention in an opioid treatment program (OTP).

METHODS

A retrospective longitudinal review of 851 clients who received methadone at the only state-funded OTP in Spokane County, Washington between 2015 and 2017. A time variable (the number of days in treatment) and a status indicator (to distinguish between clients who dropped out or censored) worked together to define retention in treatment. Our hypothesized covariates included: area deprivation, distance to the OTP, availability of cannabis retail outlets, availability of on-premise and off-premise alcohol outlets, methadone dosage, age, gender, race, and years on treatment. Cox regression within the family of survival analysis was used to model time-to-event data in the presence of censored cases.

RESULTS

The median duration of retention was 394 (95%CI = 324-464) days. In the multivariable Cox regression, factors predicting treatment retention were area deprivation (HR = 1.79, 95%CI = 1.02-3.15, p = 0.04), age (HR=0.99, 95%CI=0.98-.99, p = 0.008), dosage of methadone (HR=0.98, 95%CI=0.98-0.98, p < 0.001), and the number of years on treatment (HR=1.12, 95%CI=1.06-1.18, p < 0.001).

CONCLUSIONS

The findings of this study showed age and methadone dosage were protective factors and area deprivation and years on treatment were risk factors for treatment retention. After dichotomizing methadone dosage, a unique finding of this study was that higher dosage of methadone did not lead to increasingly smaller HRs for dropping out of treatment. Considering that opioid use disorder is a chronic condition, efforts need to be made to target factors associated with retention.

Treatment initiation strategies for syringe exchange referrals to methadone maintenance: A randomized clinical trial

This randomized clinical trial evaluated the efficacy of three treatment initiation strategies for improving retention to methadone maintenance for opioid-dependent individuals referred from a syringe exchange program (SEP). New admissions (n = 212) were randomly assigned to one of three 3-month initiation strategies: 1) Low Threshold (LTI), 2) Voucher Reinforcement (VRI), or 3) Standard Care (SCI). LTI was modeled on interim methadone maintenance to transition SEP admissions to the structure of medication-assisted treatment while maximizing exposure to methadone pharmacotherapy. VRI used monetary incentives to reinforce adherence to pharmacotherapy and adaptive counseling. SCI participants received standard methadone dosing and adaptive counseling. All participants were stabilized on methadone pharmacotherapy with a target dose of 80 mg. Following the initiation phase, participants in each condition received standard adaptive counseling from months 4-6. Results showed that most participants failed to achieve the target methadone dose. While no condition differences were observed in retention rates over the 3-month and 6-month observation periods, participants across conditions exhibited reductions in objective and self-report measures of drug use. Results support the benefits of referring syringe exchangers to methadone maintenance, and demonstrate the challenge of retaining these individuals in treatment.