The relative impact of nicotine dependence versus other substance dependence on decision-making

Research has indicated that individuals who are dependent on substances may have decision-making deficits that contribute to their continued substance use. Previous studies have shown that substance-dependent individuals focus more on the immediate rather than the delayed consequences of their actions, and more rapidly discount rewards that are available after a delay than individuals without a history of substance dependence. The present study compared the performance of four groups of individuals on the Gambling Task and the Delayed Discounting Task. The groups were (a) heavy smokers with comorbid substance dependence, (b) heavy smokers with no history of substance dependence, (c) substance dependent never smokers, and (d) never smokers with no history of substance dependence. Analysis revealed a main effect of substance use disorder status, such that individuals who were dependent on substances other than nicotine achieved lower net scores on the Gambling Task than those with no history of substance dependence (p = .05). A significant sex by substance use disorder status interaction was also identified (p = .01). Unexpectedly, no differences in Gambling Task performance were found between smokers and non-smokers. However, individuals who smoked and/or were dependent on another substance discounted delayed rewards on the Delay Discounting Task more rapidly than individuals with no history of smoking or other substance dependence (all p\u27s \u3c .05), and no differences in the performance of heavy smokers and substance-dependent individuals were found. Overall, findings indicate that smoking status may impact performance on the Delay Discounting Task, but does not impact Gambling Task performance. Although no sex differences in performance were identified on the Delayed Discounting Task, performance on the Gambling Task differed between men and women

Heavy smokers choose large, immediate rewards with large penalties on a simulated task of gambling

The Gambling Task is a complex neuropsychological test (in the form of a card game) that examines the ability of individuals to assess potential immediate gains over long-term losses. Gambling Task performance has been examined in previous studies with individuals who are dependent on alcohol, cocaine, heroin, and amphetamine. These studies have shown that those who are dependent on the aforementioned substances perform more poorly on the Gambling Task than controls. Specifically, in relation to controls, drug/alcohol dependent individuals show impairment by tending to pick more cards that have large immediate gains and very large delayed punishers. The delayed punisher is larger than the immediate gain, so there is a net loss in play money. Individuals who are not dependent on substances tend to choose cards that yield small immediate gains and very small delayed punishers. The delayed punisher is smaller than the immediate gain, so there is a net increase in play money. In order to test the hypothesis that heavy smokers display the same pattern of decision-making, the Gambling Task was administered to a sample of 40 participants (23 heavy smokers and 17 never-smokers). Results indicated that heavy smokers performed more poorly on the Gambling Task than non-smoking controls. Specifically, heavy smokers chose more cards from the decks with large delayed punishers than did the control group

Characteristics of adults involved in alcohol-related intimate partner violence: results from a nationally representative sample

Background More than 12 million women and men are victims of partner violence each year. Although the health outcomes of partner violence have been well documented, we know very little about specific event-level characteristics that may provide implications for prevention and intervention of partner violence situations. Therefore, the purpose of this study is to evaluate substance abuse and dependence as risk factors for event-level alcohol-related intimate partner violence (IPV). Methods Data were derived from Wave II of the National Epidemiological Survey on Alcohol and Related Conditions (2004–2005). Eligible participants (N = 2,255) reported IPV the year before the survey. Negative binomial and ordinal regression methods were used to assess risk factors for alcohol use during IPV. Results Respondent PTSD was the only mental health diagnosis related to alcohol use during IPV (OR = 1.45). Marijuana use was related to respondents’ use of alcohol during IPV (OR = 2.68). Respondents’ meeting the criteria for alcohol abuse/dependence was strongly associated with respondent drinking (OR = 10.74) and partner drinking (OR = 2.89) during IPV. Conclusion Results indicate that PTSD, marijuana use disorders, alcohol abuse and dependence are associated with more frequent alcohol use during IPV. In addition, it is important to consider that the patient who presents in emergency settings (e.g., hospitals or urgent care facilities) may not be immediately identifiable as the victim or the perpetrator of partner violence. Therefore, screening and intervention programs should probe to further assess the event-level characteristics of partner violence situations to ensure the correct service referrals are made to prevent partner violence

Using mHealth to Increase Treatment Utilization Among Recently Incarcerated Homeless Adults (Link2Care): Protocol for a Randomized Controlled Trial

Background: There is a significant revolving door of incarceration among homeless adults. Homeless adults who receive professional coordination of individualized care (ie, case management) during the period following their release from jail experience fewer mental health and substance use problems, are more likely to obtain stable housing, and are less likely to be reincarcerated. This is because case managers work to meet the various needs of their clients by helping them to overcome barriers to needed services (eg, food, clothing, housing, job training, substance abuse and mental health treatment, medical care, medication, social support, proof of identification, and legal aid). Many barriers (eg, limited transportation, inability to schedule appointments, and limited knowledge of available services) prevent homeless adults who were recently released from incarceration from obtaining available case management, crisis management, substance abuse, and mental health services. Objective: The aim of the Link2Care study is to assess the effectiveness of a smartphone app for increasing case management and treatment service utilization, and in turn reduce homelessness and rearrest. The goals of this research are to (1) assess the impact of an innovative smartphone app that will prompt and directly link recently incarcerated homeless adults to community-based case management services and resources and (2) utilize in-person and smartphone-based assessments to identify key variables (eg, alcohol or drug use, social support, psychological distress, and quality of life) that predict continued homelessness and rearrest. Methods: Homeless adults (N=432) who enroll in a shelter-based Homeless Recovery Program after release from the Dallas County Jail will be randomly assigned to one of the three treatment groups: (1) usual case management, (2) usual case management plus smartphone, and (3) usual case management with a study-provided smartphone that is preloaded with an innovative case management app (smartphone-based case management). Those assigned to smartphone-based case management will receive smartphones that prompt (twice weekly) connections to shelter-based case managers. The app will also offer direct links to case managers (available during normal business hours) and crisis interventionists (available 24 hours a day, 7 days a week) with the touch of a button. Results: Recruitment began in the spring of 2018, and data collection will conclude in 2021. Conclusions: This research represents an important step toward integrated service connection and health care service provision for one of the most underserved, high need, and understudied populations in the United States. Trial Registration: ClinicalTrials.gov NCT03399500; https://clinicaltrials.gov/ct2/show/NCT03399500 (Archived by WebCite at http://www.webcitation.org/6zSJwdgUS) Registered Report Identifier: RR1-10.2196/986

Cross-sectional Associations of Opiate Misuse/Opioid Use Disorder among Adults Experiencing Homelessness

The purpose of this manuscript is to determine the prevalence of opioid misuse/opioid use disorder (OUD) among adults experiencing homelessness and describe characteristics that account for significant variance in relation to opioid misuse in those who misuse and do not misuse opioids. From six homeless shelters in Oklahoma City, adults participated in a survey about their demographics, substance use, mental health, and physical health from July to August of 2016 (n = 569). For assessing substance use, participants responded about their opioid misuse and diagnosis of OUD, current smoking status, arrests due to drug possession or driving while intoxicated, and diagnosis with alcohol use disorder or another drug use disorder, excluding opiate use disorder. A cumulative score of mental health comorbidity was created based on affirmative responses for having been diagnosed with depression, post-traumatic stress disorder (PTSD), schizophrenia/schizoaffective disorder, bipolar disorder, or an anxiety disorder besides PTSD. For physical health, one item from the General Health Survey-Short Form assessed pain, one item from the Behavioral Risk Factor Surveillance Survey assessed health, and one item assessed history of concussion. Bivariate analyses and logistic regression models identified the association. Sixteen percent of participants reported having experienced opioid misuse/been diagnosed with OUD. Substance use behaviors and physical health accounted for significant variance among those who misuse compared to those that do not misuse opioids. The most robust positive association of opioid misuse included: being white, being a current smoker, being diagnosed with another drug disorder, and having a concussion history. Additional research among the homeless population with a focus on concussion history as it relates to substance use and mental health comorbidity is needed

Exposure to Violence and Sleep Inadequacies among Men and Women Living in a Shelter Setting

Exposure to violence may explain sleep inadequacies reported by homeless adults, with women being potentially more susceptible to violence and sleep disturbances than men. This study examined the association between violence and sleep inadequacies among homeless adults and explored differences by sex. Adult participants were recruited from a shelter (n = 194; 71.1% men, Mage = 43.8+12.2). Participants self-reported victimization and/or witnessing violence (mugging, fight, and/or sexual assault) at the shelter, sleep duration (over an average 24 hours), insufficient sleep (days without sufficient rest/sleep), and unintentional daytime sleep (days with unintentional sleep) in the past month. Linear regressions were used to estimate associations between violence and sleep inadequacies, controlling for sex, age, race, months homeless, and depression. Moderation by sex was examined via an interaction term following mean-centering of variables. Overall, 20.6% of participants (n = 40) reported victimization since moving to the shelter. In the last month, participants reported witnessing an average of 2.9+5.1 acts of violence. Over the same timeframe, participants reported 6.9+2.0 hours of sleep nightly, 11.2+10.7 days of insufficient sleep, and 6.2+8.8 days with unintentional daytime sleep. In adjusted analyses, witnessing violence was associated with insufficient sleep (p = .001). Men and women differed only in age and race in unadjusted analyses; sex was not a significant moderator of any association between violence and sleep in adjusted analyses. Links between witnessing violence and sleep inadequacies should be considered in shelter health promotion efforts. Successful efforts to minimize violence may reduce insufficient sleep amongst both sexes

The Indirect Effect of Smoking Level in the Association Between Urban Stress and Readiness to Quit Smoking among Adults Experiencing Homelessness

Over 70% of adults experiencing homelessness are cigarette smokers, a fivefold greater rate than in the general U.S. population. Consequently, tobacco-related conditions are the leading causes of disease and death for this group. Adults experiencing homelessness tend to seek shelter in urban areas. Thus, they not only experience the daily stressors of being homeless, but they may additionally experience unique or additive urban stressors (e.g., stress related to using public services, crime and violence, and/or cultural conflicts with others). For some smokers, stress is known to increase smoking rates and decrease readiness to quit smoking. Likewise, increased smoking rates alone may lead to a lower likelihood of making a quit attempt. The current study examined the potential mediating role of smoking level in the association of urban stress and quit readiness among adults experiencing homelessness (N = 411). Two multinomial logistic regression analyses revealed that urban stress was positively associated with smoking level (p = 0.02). The odds ratio for one-unit increase in stress was 1.047 (CI.95:1.014, 1.082) for being a heavy vs. non-daily smoker. Furthermore, analyses revealed smoking level mediated the effect of stress on quit readiness (ab = -0.005, CI.95:-0.010, -0.002]). Homeless smokers who report high levels of stress might smoke at higher levels, which could attenuate quit readiness

Cumulative Risk Factors Associated with Food Insecurity among Adults who Experience Homelessness

There is a dearth of research on the determinants of food insecurity among adults who experience homelessness. According to cumulative risk theory, it is the accumulation of risk factors that places individuals in jeopardy for negative health consequences. Building on the cumulative risk theory, domain specific indices were created to examine the relationship between four cumulative risk factors and food insecurity among adults who experience homelessness. Adult participants were recruited from six area shelters in Oklahoma City (N = 565) during July – August of 2016. Participants who affirmatively responded to two to six items of the six-item USDA Food Security Scale-Short form were categorized as food insecure. Four indices of cumulative risk were created based on affirmative survey responses: poor health & risky health behaviors index, personal and sexual victimization index, household disruption, and financial strain. Covariate-adjusted logistic regression models predicted the odds of adults experiencing food insecurity. Seventy-eight percent of the sample experienced food insecurity. Higher scores for the poor health and risky health behaviors index predicted higher odds of experiencing food insecurity (OR = 1.80, CI: 1.51 – 2.14). Higher scores for the personal and sexual victimization index also predicted higher odds of experiencing food insecurity (OR = 1.57, CI: 1.20 – 2.04). To facilitate food security among adults experiencing homelessness, shelters and community-based programs need to consider homelessness and food insecurity to be multi-faceted public health problems that are interrelated

Health Literacy and Self-Rated Health among Homeless Adults

Poor health literacy reduces the efficacy of behavior change interventions, hampers management of health conditions, and attenuates understanding of the prevention and treatment of diseases. Poor health literacy has also been linked to fair/poor self-rated health in domiciled samples; however, there is a paucity of studies on the relation amongst homeless adults, who bear a disproportionate burden of disease and disability and require a high level of care and access to health services. Here, we examined the association between health literacy and self-rated health among a convenience sample of homeless adults. Participants were recruited from six homeless-serving agencies in Oklahoma City (N = 575; 63% men, Mage = 43.6+12.3). We used logistic regression to assess the association between health literacy (confidence completing medical forms: extremely/quite a bit versus somewhat/little bit/not at all) and self-rated health (poor/fair versus good/very good/excellent), controlling for age, subjective social status, education, race, sex, income, health insurance, employment, social security recipient status, diabetes diagnosis, high blood pressure diagnosis, and high cholesterol diagnosis. In the adjusted model, health literate homeless individuals had greater odds of endorsing good/very good/excellent self-rated health compared to those somewhat/a little bit/not at all confident completing medical forms (AOR = 2.02, [CI95% = 1.35-3.02]). Interventions targeted at adjusting reading level and comprehensibility of health information are needed for homeless individuals with poor/limited health literacy, which may ultimately impact their self-rated health. Shelters and homeless-serving agencies could host classes focused on practical skills for enhancing health literacy and/or provide navigation services

Technology-mediated just-in-time adaptive interventions (JITAIs) to reduce harmful substance use: A systematic review

Background and Aims: Lapse risk when trying to stop or reduce harmful substance use is idiosyncratic, dynamic and multi-factorial. Just-in-time adaptive interventions (JITAIs) aim to deliver tailored support at moments of need or opportunity. We aimed to synthesize evidence on decision points, tailoring variables, intervention options, decision rules, study designs, user engagement and effectiveness of technology-mediated JITAIs for reducing harmful substance use.  Methods: Systematic review of empirical studies of any design with a narrative synthesis. We searched Ovid MEDLINE, Embase, PsycINFO, Web of Science, the ACM Digital Library, the IEEE Digital Library, ClinicalTrials.gov, the ISRCTN register and dblp using terms related to substance use/mHealth/JITAIs. Outcomes were user engagement and intervention effectiveness. Study quality was assessed with the mHealth Evidence Reporting and Assessment checklist.  Findings: We included 17 reports of 14 unique studies, including two randomized controlled trials. JITAIs targeted alcohol (S = 7, n = 120 520), tobacco (S = 4, n = 187), cannabis (S = 2, n = 97) and a combination of alcohol and illicit substance use (S = 1, n = 63), and primarily relied on active measurement and static (i.e. time-invariant) decision rules to deliver support tailored to micro-scale changes in mood or urges. Two studies used data from prior participants and four drew upon theory to devise decision rules. Engagement with available JITAIs was moderate-to-high and evidence of effectiveness was mixed. Due to substantial heterogeneity in study designs and outcome variables assessed, no meta-analysis was performed. Many studies reported insufficient detail on JITAI infrastructure, content, development costs and data security.  Conclusions: Current implementations of just-in-time adaptive interventions (JITAIs) for reducing harmful substance use rely on active measurement and static decision rules to deliver support tailored to micro-scale changes in mood or urges. Studies on JITAI effectiveness are lacking