Evaluating a longitudinal mediation model of perceived stress, depressive symptoms, and substance use treatment outcomes

Measurement invariance of the perceived stress scale across race, sex, and time, and differential impacts on cocaine use treatment outcomes

INTRODUCTION

To understand the influence of phenotypic characteristics, such as stress, on substance use treatment outcomes, measures must function equivalently across groups to allow for interpretable comparisons of effects. The present study evaluated measurement invariance of the Perceived Stress Scale (PSS) across race, sex, and time, examined its association with cocaine use disorder (CUD) treatment outcomes, and tested whether associations were moderated by race and/or sex.

METHODS

Data from four clinical trials evaluating behavioral and/or pharmacological treatments for cocaine use were combined providing a total sample of 302 participants with DSM-IV cocaine abuse/dependence (57.6 % Black, 42.4 % White, 43.7 % females, Mage = 40.22 years, SD = 9.26).

RESULTS

Factor analyses support a two-factor model (i.e., general stress, self-efficacy to cope with stressors) that demonstrated configural, metric, and scalar invariance across race and sex and configural and metric invariance across time. End-of-treatment stress and coping were both related to treatment outcomes, but not treatment retention. Interactions between baseline and end-of-treatment stress and coping self-efficacy with race and sex predicting treatment retention and outcomes were not significant.

CONCLUSIONS

Results support the utility of the PSS to examine between-group differences among individuals with CUD and suggest that sociodemographic groups differ in the extent to which stress and self-efficacy to cope influence treatment outcomes.

Depression as a mediator of the association between vision and/or hearing loss and recent substance use: NHANES 2013-2018

BACKGROUND

Previous research has demonstrated a significant association between vision and/or hearing loss and lifetime substance use.

OBJECTIVE

The objective of this analysis was to assess whether depression mediates the association between vision and/or hearing loss and recent substance use (RSU).

METHODS

Data from 9408 NHANES 2013-2018 participants were used for a survey-weighted analysis to assess whether the indirect effect (IE) of disability status (neither, vision loss only, hearing loss only, both) on the outcome RSU (past 30-day use of marijuana, cocaine, methamphetamine, or heroin) was mediated by recent (past 2 weeks) depression (Patient Health Questionnaire- 9 items score; none = 0-4, mild or greater = 5+), adjusting for confounders.

RESULTS

The estimated prevalence of vision and/or hearing loss, mild or greater depression, and RSU were 6.7 %, 24.1 %, and 16.8 %. RSU was significantly positively associated with disability status before (p = .018) but not after adjusting for depression (p = .160), and the indirect effects were statistically significant (p < .001).

CONCLUSIONS

The data are consistent with the hypothesis that recent depression mediates the association between vision and/or hearing loss and RSU. Initiatives may be needed that incorporate a focus on the prevention, management, or care for depression to intervene on the pathway between hearing and/or vision loss and RSU.

Exploring the performance of during-treatment substance use outcome measures in predicting longer-term psychosocial functioning and post-treatment abstinence

BACKGROUND

The selection of appropriate efficacy endpoints in clinical trials has been a long-standing challenge for the substance use disorder field. Using data from a large, multi-site National Drug Abuse Treatment Clinical Trials Network trial (CTN-0044; n=474), this secondary data analysis aimed to explore whether specific proximal (during-treatment) substance use outcome measures predict longer-term improvements in psychosocial functioning and post-treatment abstinence, and whether predictions vary depending on the specific substance (cannabis, cocaine/stimulants, opioids, and alcohol).

METHODS

Generalized linear mixed models examined associations between six during-treatment substance use outcome measures and social functioning impairment (Social Adjustment Scale Self-Report) and severity of psychiatric symptoms (Brief Symptom Inventory-18) at end-of-treatment, and 3- and 6-months after treatment as well as post-treatment abstinence.

RESULTS

Maximum days of consecutive abstinence, proportion of days abstinent, ≥3 weeks of continuous abstinence, and the proportion of urine specimens negative for the primary substance were associated with post-treatment psychiatric and social functioning improvement and abstinence. However, only the effects of abstinence during the last 4 weeks of the treatment period on all three post-treatment outcomes was stable over time and did not differ between primary substance groups. In contrast, complete abstinence during the 12-week treatment period was not consistently associated with functioning improvements.

CONCLUSIONS

Substance use outcome measures capturing the duration of primary substance abstinence during treatment are suitable predictors of post-treatment abstinence and longer-term psychosocial functioning improvement. Binary outcomes, such as end-of-treatment abstinence, may be particularly stable predictors and attractive given their ease of computation and straightforward clinical interpretability.

Adverse childhood experiences and perceived stress in early adulthood in the context of disadvantage

BACKGROUND

Adverse childhood experiences (ACEs) may sensitize individuals to view situations in adulthood as more stressful, which may contribute to poor health outcomes. In populations facing disadvantage, ACEs may lead to the accumulation of stressors (stress proliferation or mediation hypothesis) throughout the life course. ACEs could also heighten perceived stress later in life due to its enduring impact (stress sensitization or effect modification hypothesis).

OBJECTIVE

We examine the associations between ACEs and perceived stress in early adulthood, considering concurrent life stressors, in a longitudinal cohort of Puerto Rican youth exposed to a high degree of disadvantage.

PARTICIPANTS AND SETTING

A community-based sample of 1626 Puerto Rican children living in disadvantaged contexts was followed longitudinally in the Boricua Youth Study from 2000 to 2017.

METHODS

ACEs were measured prospectively during childhood (<18 yrs), and life stressors and past year perceived stress were measured in early adulthood (EA; mean age = 23.4, sd 2.22). Causal mediation analysis tested ACEs' effects on EA perceived stress indirectly through life stressors including potential effect modification.

RESULTS

ACEs influenced perceived stress in EA (standardized total effect = 0.13, p < .001) with 35% mediated by increased exposure to life stressors in EA due to ACEs. There was no evidence of increased sensitization to EA life stressors among those with higher ACEs exposure.

CONCLUSIONS

ACEs contribute to perceived stress in EA, albeit with small effect, partially through accumulating effects of ongoing stressors, supporting the stress proliferation hypothesis. Policies aimed at reducing exposure to adversity from childhood to EA are needed to reduce the experience of ACEs and negative sequelae.

Development of the Risk of Relapse Assessment Scale for methamphetamine abusers in China

BACKGROUND

Relapse to Methamphetamine (MA) use is among the public concerns nowadays, which result in adverse outcomes associated with physical and mental health problems. This study aimed to develop the Risk of Relapse Assessment Scale (RRAS) for Chinese MA abusers.

METHOD

A sample of 438 MA abusers aged between 17 and 58 years (M ± SD age = 34.08 ± 8.61 years) in compulsory detoxification institutes were randomly divided into sub-sample 1 (n = 223) and sub-sample 2 (n = 215) for conducting exploratory factor analysis and confirmatory factor analysis respectively.

RESULTS

Compared four-factor model with 19 items and three-factor model with 16 items using principal axis factoring, the three-factor solution showed better model fit. Three factors were identified in RRAS: Craving for MA, Social Recognition, and Attitude towards MA which accounted for 50.06 % of the variance in total. The results of confirmation factor analysis demonstrated good model fits (CFI = 0.95; TLI = 0.94; RMSEA = 0.050; GFI = 0.92). The internal consistency analysis indicated that the three-factor model had satisfactory reliability with Cronbach alphas ranging from 0.71 to 0.88 for different factors. Overall, the results showed that the RRAS had good construct validity and satisfactory reliability, suggesting that it was a good instrument for measuring the relapse of MA.

CONCLUSIONS

The RRAS with good psychometric properties provides a promising future for developing effective relapse prevention programs for MA abusers in China.

Mobile Mental Health Apps from the National Center for PTSD: Digital Self-Management Tools for Co-Occurring Disorders

Mobile mental health apps can help bridge gaps in access to care for those with substance use disorders and dual diagnoses. The authors describe a portfolio of free, publicly available mobile mental health apps developed by the National Center for PTSD. The authors also demonstrate how this suite of primarily non-substance use disorder-specific mobile mental health apps may support the active ingredients of substance use disorder treatment or be used for self-management of substance use disorder and related issues. The potential advantages of these apps, as well as limitations and considerations for future app development, are discussed.

Early Life Stress and Risks for Opioid Misuse: Review of Data Supporting Neurobiological Underpinnings

A robust body of research has shown that traumatic experiences occurring during critical developmental periods of childhood when neuronal plasticity is high increase risks for a spectrum of physical and mental health problems in adulthood, including substance use disorders. However, until recently, relatively few studies had specifically examined the relationships between early life stress (ELS) and opioid use disorder (OUD). Associations with opioid use initiation, injection drug use, overdose, and poor treatment outcome have now been demonstrated. In rodents, ELS has also been shown to increase the euphoric and decrease antinociceptive effects of opioids, but little is known about these processes in humans or about the neurobiological mechanisms that may underlie these relationships. This review aims to establish a theoretical model that highlights the mechanisms by which ELS may alter opioid sensitivity, thereby contributing to future risks for OUD. Alterations induced by ELS in mesocorticolimbic brain circuits, and endogenous opioid and dopamine neurotransmitter systems are described. The limited but provocative evidence linking these alterations with opioid sensitivity and risks for OUD is presented. Overall, the findings suggest that better understanding of these mechanisms holds promise for reducing vulnerability, improving prevention strategies, and prescribing guidelines for high-risk individuals.

Women, opioid use and addiction

In the midst of the current coronavirus pandemic, the United States continues to struggle with an ongoing opioid epidemic, initially fueled by widespread prescribing of opioid medications during the 1990s. The primary reason for prescribing opioids is to treat pain. Women have more acute and chronic pain and have been prescribed these drugs in significantly greater numbers than men. Comparison of women and men with chronic pain also shows that women receive the majority of prescription opioids, and the use of these prescribed medications became the major pathway to misuse and addiction for women. Yet, recognition of the extent of women's exposure to opioids and the attendant consequences has been limited. Attempts to stem the overall tide of the epidemic focused on reducing the availability of prescription opioids. However, as these medications became more difficult to obtain and treatment opportunities were limited, many turned to other synthetic opioids, such as heroin and fentanyl. Thus, the public health crisis of opioid addiction has endured. This paper highlights the importance of understanding differences among women and men in opioid use and its biological and psychosocial effects to advance the gender-based treatment approaches and effective public health policy.

Cognitive profiles in persons with opioid use disorder enrolled in methadone treatment

Cognitive impairment is common in persons with opioid use disorder and associated with poor treatment outcomes, including elevated risk for relapse. Much less is known about the underlying structure of these deficits and the possible presence of cognitive phenotypes. A total of 177 adults (average 42.2 years of age, 52.0% male, 65.5% Caucasian) enrolled in a methadone maintenance treatment program completed the NIH Toolbox as part of a larger project. Cluster analyses revealed a 2-cluster solution-persons with intact cognitive function in all domains (n = 93; Intact) and those with impairments on tests of attention and executive function (n = 83; Impaired). Follow-up analyses revealed that the Impaired group was slightly older, more likely to self-identify as a racial/ethnic minority, and less likely to report consuming alcohol four or more times per week. These findings suggest the existence of distinct cognitive profiles in persons with opioid use disorder and encourage further examination, particularly studies to examine the possible benefits of routine screening for cognitive impairment as part of substance use treatment.