A multilevel decomposition approach to estimate the role of program location and neighborhood disadvantage in racial disparities in alcohol treatment completion

Racial and ethnic differences in self-reported barriers to substance use treatment among emergency department patients

BACKGROUND AND OBJECTIVES

As overdose rates rise among non-White Americans, understanding barriers to substance use disorder (SUD) treatment access by race and ethnicity is important. This study explores self-reported barriers to SUD treatment by race and ethnicity in emergency department (ED) populations.

METHODS

We conducted a secondary, exploratory analysis of a randomized trial of patients not seeking SUD treatment who endorsed active drug use at six academic EDs. Responses to the Barriers to Treatment Inventory were compared by race, ethnicity, and drug severity, using χ2 tests (N = 858), followed by adjusted logistic regression models.

RESULTS

Absence of a perceived drug problem (39% non-Hispanic Black, 38% Hispanic, 50% non-Hispanic White; p ≤ .001) was the most prevalent barrier to SUD treatment. Non-Hispanic Black participants were less likely to state that they could handle their drug use on their own (OR = 0.69, CI = 0.50-0.95), and were more likely to report disliking personal questions than non-Hispanic White participants (OR = 1.49, CI = 1.07-2.09). Non-Hispanic Black participants were less likely than Hispanic participants to agree that treatment availability (OR = 0.46, CI = 0.28-0.76) and family disapproval (OR = 0.38, CI = 0.16-0.91) were treatment barriers.

DISCUSSION AND CONCLUSIONS

Screening and counseling may help address the barrier, common to all groups, that drug use was not seen as problematic. Expanding access to diverse treatment options may also address the range of barriers reported by our study population.

SCIENTIFIC SIGNIFICANCE

Our study is one of the first in the U.S. to examine both individual and structural barriers to accessing treatment and to examine the association with drug use severity by race/ethnicity.

Race, psychosocial characteristics, and treatment outcomes among individuals undergoing treatment for cannabis use disorder: A latent profile analysis based on preferred method of using cannabis

INTRODUCTION

There are a wide variety of methods for using combustible cannabis which may impact an individual's pattern of use as well as their response to cannabis use disorder (CUD) treatment. Previous research has noted racial/ethnic differences in cannabis users' preferred method of use.

METHOD

The current study examined data from a randomized placebo-controlled trial of a pharmacological intervention for adults with CUD. Latent profile analysis classified participants (N = 302) based on their primary method of combustible cannabis use.

RESULTS

A four profile solution emerged which identified participants who demonstrated 1) Primarily Joint (n = 50), 2) Primarily Blunt (n = 106), 3) Mixed MoU (n = 30), and 4) Primarily Pipe (i.e., pipe or bong; n = 116) use. Profiles were compared on socio-demographic characteristics and racial differences were found among the four latent profiles as well as differences in their level of use. Cannabis users with a preference for joints were more likely to be White as compared to other racial groups. In contrast, a greater proportion of participants with a preference for blunts were African American. The Primarily Joint profile was found to have the highest cannabis relapse rate at 1-month follow-up (94%) which was significantly greater than the Mixed MoU (74%, x² = 5.06, p < .05) and Primarily Pipe (78%, x² = 9.24, p < .01) profiles. Interestingly, there was no difference in 1-Month Follow-up cannabis relapse rates between the Primarily Joint and Blunt profiles (87%, x² = 9.24, p > .05).

CONCLUSIONS

Findings suggest that treatment-seeking individuals who primarily use joints or blunts may face unique challenges that may impact cannabis abstinence. Along with other cannabis-related characteristics, an individual's preferred method of use may represent an important factor to consider in the treatment of CUD.

Factors Associated with Substance Use Disorder Treatment Completion, Rhode Island, USA, 2018

INTRODUCTION

The successful retention of individuals with substance use disorders in treatment remains a challenge but is an important indicator of positive post-treatment outcomes. The aim of this study is to advance understanding of pre-admission factors associated with substance use treatment completion in Rhode Island.

METHODS

Data for this longitudinal analysis are from the RI Behavioral Health On-Line Database (RI-BHOLD). The primary outcome of interest was substance use treatment completion defined as any planned discharge from treatment, including transfers to other facilities. Associations were assessed using generalized estimating equations (GEE) to account for the potential of repeated measures for the same individuals.

RESULTS

Among the 7,351 clients discharged from a substance use treatment program in RI in 2018, the treatment completion rate was 58.1%. There was a positive relationship between the frequency of attendance of voluntary self-help groups and odds of treatment completion. Treatment completion rates were lower among those who reported use of opioids (AOR: 0.59; 95% CI: 0.52-0.66) and other drugs (AOR: 0.52; 95% CI: 0.44-0.62), compared to alcohol and for those with co-occurring mental health conditions (AOR: 0.85; 95% CI: 0.76-0.94).

CONCLUSIONS

This study highlights the importance of social connectedness in substance use disorder treatment completion. Future research is needed to identify the characteristics of persons who are most likely to benefit from self-help groups and the optimal combination of treatment participation and attendance of self-help groups across a spectrum of disorder severity and community resources.

Incarceration as a Reason for US Alcohol and Drug Treatment Non-completion: a Multilevel Analysis of Racial/Ethnic and Sex Disparities

Incarceration may be an overlooked reason for treatment non-completion experienced disproportionately by African Americans. This study utilized multilevel logistic regression to model treatment non-completion due to incarceration using the 2015-2016 Treatment Episode Dataset-Discharges. Among a sample restricted to treatment non-completers (n = 306,008), 5% terminated treatment because they became incarcerated (n = 13,082), which varied widely by demographics and by state. In Idaho, 46% of African Americans terminated treatment because they became incarcerated. Women had lower odds of treatment non-completion than men, and the effect of sex was strongest among African Americans (adjusted odds ratio [aOR] = 0.30, 95% confidence interval [95% CI] = 0.26-0.34). Among men, all racial/ethnic minority groups demonstrated significantly higher odds of treatment non-completion due to incarceration compared with Whites, and the strongest effect was among African Americans (aOR = 1.37, 95% CI = 1.29-1.44). Incarceration as a reason for treatment non-completion disproportionately affects African Americans and men and varies by state. Interventions targeting incarceration alternatives should be availed to racial/ethnic minorities already participating in treatment.

Race/Ethnicity, Community of Residence, and DUI Arrest After Beginning Treatment for an Alcohol Use Disorder

The purpose of this study was to examine whether racial/ethnic disparities in post-treatment arrests for driving under the influence (DUI) exist among clients receiving outpatient treatment for an alcohol use disorder (AUD) and to assess whether community characteristics were associated with this outcome. The sample included adults with an AUD entering publicly funded outpatient treatment in Washington State in 2012. Treatment data were linked with criminal justice and US Census data. Multilevel time-to-event analysis was employed to answer the research questions. Key independent variables included client race/ethnicity, community-level economic disadvantage, and racial/ethnic composition of the community. Latino clients and clients residing in communities with a higher proportion of Black residents had higher hazards of a DUI arrest post-treatment admission. Future research should examine whether disparities in DUI arrests are related to differences in treatment effectiveness or other factors (e.g., inequities in law enforcement) so that these disparities can be addressed.

Urban Religious Congregations' Responses to Community Substance Use: An Exploratory Study of Four Cases

Faith-based drug treatment programs are common, and many are implemented through congregations; however, little is documented about how congregations conceptualize and implement these programs. We use case study analysis to explore congregational approaches to drug treatment; qualitative findings emerged in three areas: (1) religion's role in congregational responses to substance use, (2) relationships between program participants and the broader congregation, and (3) interactions between congregational programs and the external community. Congregational approaches to drug treatment can be comprehensive, but work is needed to evaluate such efforts. Congregants' attitudes may influence whether program participants become members of a sustaining congregational community.

Disparities in the Treatment of Substance Use Disorders: Does Where You Live Matter?

This study focused on (1) whether disparities in timely receipt of substance use services can be explained in part by the characteristics of the community in which the clients reside and (2) whether the effect of community characteristics on timely receipt of services was similar across racial/ethnic groups. The sample was composed of adults receiving publicly funded outpatient treatment in Washington State. Treatment data were linked to data from the US census. The outcome studied was "Initiation and Engagement" in treatment (IET), a measure noting timely receipt of services at the beginning of treatment. Community characteristics studied included community level economic disadvantage and concentration of American Indian, Latino, and Black residents in the community. Black and American Indian clients were less likely to initiate or engage in treatment compared to non-Latino white clients, and American Indian clients living in economically disadvantaged communities were at even greater risk of not initiating treatment. Community economic disadvantage and racial/ethnic makeup of the community were associated with treatment initiation, but not engagement, although they did not entirely explain the disparities found in IET.

Employment after beginning treatment for substance use disorders: The impact of race/ethnicity and client community of residence

Employment is an important substance use treatment outcome, frequently used to assess individual progress during and after treatment. This study examined whether racial/ethnic disparities exist in employment after beginning treatment. It also examined the extent to which characteristics of clients' communities account for such disparities. Analyses are based on data that linked individual treatment information from Washington State's Behavioral Health Administration with employment data from the state's Employment Security Department. Analyses subsequently incorporated community-level data from the U.S. Census Bureau. The sample includes 10,636 adult clients (Whites, 68%; American Indians, 13%, Latinos, 10%; and Blacks, 8%) who had a new outpatient treatment admission to state-funded specialty treatment. Heckman models were used to test whether racial/ethnic disparities existed in the likelihood of post-admission employment, as well as employment duration and wages earned. Results indicated that there were no racial/ethnic disparities in the likelihood of employment in the year following treatment admission. However, compared to White clients, American Indian and Black clients had significantly shorter lengths of employment and Black clients had significantly lower wages. With few exceptions, residential community characteristics were associated with being employed after initiating treatment, but not with maintaining employment or with wages. After accounting for community-level variables, disparities in length of employment and earned wages persisted. These findings highlight the importance of considering the race/ethnicity of a client when examining post-treatment employment alongside community characteristics, and suggest that the effect of race/ethnicity and community characteristics on post-treatment employment may differ based on the stage of the employment process.

Does the implementation of evidence-based and culturally competent practices reduce disparities in addiction treatment outcomes?

RATIONALE

Research is limited on the extent to which implementation of evidence-based and culturally responsive practices reduces outcome disparities in substance use disorder treatment. We examined the role of contingency management treatment (CMT), medication-assisted treatment (MAT), and culturally competent practices on Mexican Americans' rate of successful completion of treatment.

METHODS

We analyzed a concatenated dataset from 153 publicly funded substance use disorder treatment programs in Los Angeles County, California, in 2011 and 2013. These data were merged with data from 15,412 adult clients in both periods, of whom we selected only Mexican Americans (46.3%) and non-Latino Whites (53.7%). The outcome was successful treatment completion. The main independent variables were client demographics, drug use severity, mental health issues, and program license and professional accreditation.

RESULTS

Less than half of the programs highly implemented CMT, MAT, and culturally competent practices. CMT and cultural competence were not associated with successful treatment completion. However, Mexican Americans in programs with high degree of implementation of MAT had higher odds of successfully completing treatment compared to non-Latino Whites and programs with low MAT (OR=1.389; 95% CI=1.018, 1.897).

CONCLUSIONS

Findings highlight the role of MAT in reducing the disparity in treatment completion between Mexican Americans and non-Latino Whites. Implications for health policy and the dissemination of MAT are discussed.

Identifying and reducing disparities in successful addiction treatment completion: testing the role of Medicaid payment acceptance

BACKGROUND

Medicaid has become the largest payer of substance use disorder treatment and may enhance access to quality care and reduce disparities. We tested whether treatment programs' acceptance of Medicaid payments was associated with reduced disparities between Mexican Americans and non-Latino Whites.

METHODS

We analyzed client and program data from 122 publicly funded treatment programs in 2010 and 112 programs in 2013. These data were merged with information regarding 15,412 adult clients from both periods, of whom we selected only Mexican Americans (n = 7130, 46.3%) and non-Latino Whites (n = 8282, 53.7%). We used multilevel logistic regression and variance decomposition to examine associations and underlying factors associated with Mexican American and White differences in treatment completion. Variables of interest included client demographics; drug use severity and mental health issues; and program license, accreditation, and acceptance of Medicaid payments.

RESULTS

Mexican Americans had lower odds of treatment completion (OR = 0.677; 95% CI = 0.534, 0.859) compared to non-Latino Whites. This disparity was explained in part by primary drug used, greater drug use severity, history of mental health disorders, and program acceptance of Medicaid payments. The interaction between Mexican Americans and acceptance of Medicaid was statistically significant (OR = 1.284; 95% CI = 1.008, 1.637).

CONCLUSIONS

Findings highlighted key program and client drivers of this disparity and the promising role of program acceptance of Medicaid payment to eliminate disparities in treatment completion among Mexican Americans. Implications for health policy during the Trump Administration are discussed.

Health in the Tenderloin: A resident-guided study of substance use, treatment, and housing

Substance use researchers recognize that environments - our homes, streets, communities, and neighborhoods - set the stage for substance use and treatment experiences by framing interactions, health options, and decision-making. The role of environment is particularly salient in places deemed disadvantaged or risky, such as parts of the Tenderloin neighborhood of San Francisco. Since risk is historically, socially, and structurally situated, an individual's social position in a neighborhood shapes how risk environments are experienced. The purpose of this study was to explore how the environment shapes substance use and treatment experiences, described from the perspective of Tenderloin residents. I conducted docent method interviews with formerly homeless women living in supportive housing in San Francisco (N = 20). The docent method is a three-stage, participant-led, audiotaped, and photographed walking interview. As they guided me through target "sites of interest" (homes, streets, treatment programs, and safe spaces), participants discussed their experiences with substance use and treatment in the environment. First, they described that the risks of a broader drug market are concentrated in the Tenderloin, exposing residents to elevated and disproportionate risk. Second, for structural, economic, social, and physical reasons, participants described a sense of geographic or neighborhood stratification. Third, multiple levels of policing and surveillance were persistent, even in participants' homes. Fourth, despite all the challenges, participants found security and support in the Tenderloin, and considered it their home. In the discussion, I offer that the Tenderloin environment provided residents many advantages, but forms of structural and everyday violence largely defined their experiences in the neighborhood.

Effects of Distance to Treatment on Subsequent Alcohol Consumption

BACKGROUND

Distance and travel time are barriers to attending and completing drug and alcohol treatment. Few studies have examined proximity to treatment in relation to long-term outcomes.

OBJECTIVES

Aims were to examine effects of distance to treatment on alcohol consumption in the year after treatment intake; assess moderation of distance effects by treatment type; and test mediators of effects of distance to treatment on later alcohol use.

METHODS

Data from clients in inpatient and outpatient alcohol treatment programs in California (n=560) were used in linear regression models.

RESULTS

There was a significant interaction between treatment type and distance on later drinking, with a significant positive association of distance to treatment with alcohol use after treatment for inpatient clients only. Among inpatient clients, none of the mediators significantly explained the relationship between a longer distance to treatment and greater subsequent alcohol use.

CONCLUSION

Inpatient clients may benefit from customized post-treatment recommendations to identify recovery resources near home.

Abstinence at Successful Discharge in Publicly Funded Addiction Health Services

Abstinence at successful discharge in substance use disorder treatment is important to reducing relapse rates and increasing long-term recovery from substance use disorders. However, few studies have examined abstinence as an essential component of successful discharge. This study examined rates and correlates of reported abstinence (nonuse of drugs 30 days prior to successful discharge) among clients attending publicly funded treatment in Los Angeles County, California. Finding show that only 36% of clients who were successfully discharged reported abstinence. Black clients were less likely than non-Hispanic Whites to report abstinence at successful discharge. Clients in methadone treatment programs were less likely than outpatient clients to report abstinence, whereas clients referred to treatment through the legal system (Proposition 36) were more likely to report abstinence compared to self-referred clients. Findings underscore the importance of systematic assessment of abstinence in determining successful discharge and provide a basis for further examination of strategies to improve abstinence and reduce relapse.

Race, Social and Environmental Conditions, and Health Behaviors in Men

Although understanding race differences in health behaviors among men is an important step in reducing disparities in leading causes of death in the United States, progress has been stifled when using national data because of the confounding of race, socioeconomic status, and residential segregation. The purpose of this study is to examine the nature of disparities in health behaviors among African American and white men in the Exploring Health Disparities in Integrated Communities Study-Southwest Baltimore, which was conducted in a racially integrated neighborhood of Baltimore to data from the 2003 National Health Interview Survey. After adjusting for age, marital status, insurance, income, educational attainment, poor or fair health, and obesity status, African American men in National Health Interview Survey had greater odds of being physically inactive (odds ratio [OR] = 1.48; 95% confidence interval [CI], 129-1.69), reduced odds of being a current smoker (OR = 0.77; 95% CI, 0.65-0.90), and reduced odds of being a current drinker (OR = 0.58; 95% CI, 0.50-0.67). In the Exploring Health Disparities in Integrated Communities Study-Southwest Baltimore sample, African American and white men had similar odds of being physically inactive (OR = 0.79; 95% CI, 0.50-1.24), being a current smoker (OR = 0.86; 95% CI, 0.60-1.23), or being a current drinker (OR = 1.34; 95% CI, 0.81-2.21). Because race disparities in these health behaviors were ameliorated in the sample where African American and white men were living under similar social, environmental, and socioeconomic status conditions, these findings suggest that social environment may be an important determinant of health behaviors among African American and white men. Public health interventions and health promotion strategies should consider the social environment when seeking to better understand men's health disparities.

Racial/Ethnic Differences in Recent Drug Detoxification Enrollment and the Role of Discrimination and Neighborhood Factors

Drug detoxification and long-term drug treatment utilization is lower for drug-dependent minorities than Whites. Log-binomial regression was used to assess discrimination and neighborhood-level factors on past 6-month drug treatment utilization among 638 New York City (NYC) drug users between 2006 and 2009. Drug-use discrimination was positively associated with detoxification and long-term treatment. Participants in higher concentrated Black neighborhoods were less likely to attend long-term treatment. Significantly fewer Blacks versus Whites and Hispanics reported drug-use discrimination, which may systematically filter drug users into treatment. More research is needed to understand social forms of discrimination and drug treatment.

Disparities in Latino substance use, service use, and treatment: implications for culturally and evidence-based interventions under health care reform

BACKGROUND

The goal of this systematic literature review was to enhance understanding of substance use, service use, and treatment among Latino subgroups to improve access to care and treatment outcomes in an era of health care reform.

METHODS

The authors used 13 electronic databases and manually searched the literature from January 1, 1978, to May 30, 2013. One hundred (69%) of 145 primary research articles met the inclusion criteria. Two blinded, independent reviewers scored each article. Consensus discussions and a content expert reconciled discrepancies.

RESULTS

Current rates of alcohol and substance abuse among Latinos are comparable to or surpass other U.S. ethnic groups. Disparities in access and quality of care are evident between Latinos and other ethnic groups. As a heterogeneous group, Latinos vary by geographic region in terms of substance of choice and their cultural identity takes precedence over general ethnic identity as a likely determinant of substance abuse behaviors. There is growing research interest in systems influencing treatment access and adherence among racial/ethnic and gender minority groups. However, studies on Latinos' service use and immediate treatment outcomes have been both limited in number and inconsistent in findings.

CONCLUSIONS

This review identified human capital, quality of care, and access to culturally responsive care as key strategies to eliminate disparities in health and treatment quality. Implications are discussed, including the need for effectiveness studies on Latinos served by systems of care that, under health care reform, are seeking to maximize resources, improve outcomes, and reduce variation in quality of care.

Excess infant mortality among Native Hawaiians: identifying determinants for preventive action

OBJECTIVES

We identified potential determinants and cause-specific sources of excess infant mortality among Native Hawaiians.

METHODS

We compared infant mortality rates among Native Hawaiians and Whites by using data from the 2002 to 2009 Hawai'i State Linked Birth/Infant Death Cohort File. We evaluated the components of excess infant mortality by age and underlying cause of death as well as maternal sociodemographic, behavioral, and chronic condition disparities.

RESULTS

The Native Hawaiian infant mortality rate was more than twice that for Whites (7.9 vs 3.5/1000 live births). Excess Native Hawaiian infant mortality was equally apportioned to neonatal and postneonatal deaths. Preterm-related causes of death accounted for 43.9% of the infant mortality disparity, followed by sudden unexpected infant death (21.6%) and injury (5.6%). In multivariable models, maternal educational inequality accounted for the largest portion of the neonatal mortality disparity (20.9%); younger maternal age (12.2%) and smoking (9.5%) were the only significant contributors to the postneonatal mortality disparity.

CONCLUSIONS

Addressing educational inequalities, promoting safe sleep practices, and reducing smoking among Native Hawaiian mothers would help to eliminate excess infant mortality.

HIV awareness in China among women of reproductive age (1997-2005): a decomposition analysis

HIV prevalence in China is less than one per cent, but the absolute number of people living with HIV/AIDS is large and growing. Given the limited scope of any potential cure for HIV, prevention plays a crucial role in controlling the epidemic. This paper examines the evolution of HIV awareness among women in China between 1997 and 2005. A regression decomposition analysis technique was used to disentangle the two main components driving a change in HIV awareness. The results show that HIV awareness has increased over time in China. The gaps between groups are narrowing over time and lower HIV awareness groups are catching up with the higher awareness groups. In 2005 education remained one of the main factors associated with HIV awareness, the other main factors being ethnicity, exposure to TV and newspapers. The increases in HIV awareness observed between 1997 and 2001 are similar between groups of women with different demographic characteristics, whereas between 2003 and 2005 increases are more pronounced among specific groups of women such as women from rural areas, women from Western parts of the country, women who belong to ethnic minorities and those with no education or with only primary education. The results suggest that the main driver of the observed change in HIV awareness over time in China is change in the environment such as in political commitment, interventions and campaigns rather than change in population structure.

Disparities in completion of substance abuse treatment between and within racial and ethnic groups

OBJECTIVE

To evaluate disparities in substance abuse treatment completion between and within racial and ethnic groups in publicly funded treatment in Los Angeles County, California.

DATA SOURCE

The Los Angeles County Participant Reporting System with multicross-sectional annual data (2006-2009) for adult participants (n = 16,637) who received treatment from publicly funded programs (n = 276) for the first time.

STUDY DESIGN

Retrospective analyses of county discharge and admission data. Hierarchical linear regressions models were used to test the hypotheses.

DATA COLLECTION

Client data were collected during personal interviews at admission and discharge for most participants.

PRINCIPAL FINDINGS

African Americans and Latinos reported lower odds of completing treatment compared with Whites. Within-group analysis revealed significant heterogeneity within racial and ethnic groups, highlighting primary drug problem, days of drug use before admission, and homelessness as significant factors affecting treatment completion. Service factors, such as referral by the criminal justice system, enabled completion among Latinos and Whites only.

CONCLUSIONS

These findings have implications for reducing health disparities among members of racial and ethnic minorities by identifying individual and service factors associated with treatment adherence, particularly for first-time clients.

Blacks and Hispanics are less likely than whites to complete addiction treatment, largely due to socioeconomic factors

More than one-third of the approximately two million people entering publicly funded substance abuse treatment in the United States do not complete treatment. Additionally, racial and ethnic minorities with addiction disorders, who constitute approximately 40 percent of the admissions in publicly funded substance abuse treatment programs, may be particularly at risk for poor outcomes. Using national data, we found that blacks and Hispanics were 3.5-8.1 percentage points less likely than whites to complete treatment for alcohol and drugs, and Native Americans were 4.7 percentage points less likely to complete alcohol treatment. Only Asian Americans fared better than whites for both types of treatment. Completion disparities for blacks and Hispanics were largely explained by differences in socioeconomic status and, in particular, greater unemployment and housing instability. However, the alcohol treatment disparity for Native Americans was not explained by socioeconomic or treatment variables, a finding that warrants further investigation. The Affordable Care Act could reduce financial barriers to treatment for minorities, but further steps, such as increased Medicaid funding for residential treatment and better cultural training for providers, would improve the likelihood of completing treatment and increase treatment providers' cultural competence.

Do cultural and linguistic competence matter in Latinos' completion of mandated substance abuse treatment?

BACKGROUND

Increasing evidence suggests that culturally and linguistically responsive programs may improve substance abuse treatment outcomes among Latinos. However, little is known about whether individual practices or culturally and linguistically responsive contexts support efforts by first-time Latino clients to successfully complete mandated treatment.

METHODS

We analyzed client and program data from publicly funded treatment programs contracted through the criminal justice system in California. A sample of 5,150 first-time Latino clients nested within 48 treatment programs was analyzed using multilevel logistic regressions.

RESULTS

Outpatient treatment, homelessness, and a high frequency of drug use at intake were associated with decreased odds of treatment completion among Latinos. Programs that routinely offered a culturally and linguistically responsive practice-namely, Spanish-language translation-were associated with increased odds of completion of mandated treatment.

CONCLUSIONS

These preliminary findings suggest that concrete practices such as offering Spanish translation improve treatment adherence within a population that is at high risk of treatment dropout.

A multilevel analysis of regional and individual effects on methadone maintenance treatment in Taiwan

OBJECTIVE

This study evaluated the direct and interactive effects of regional-level and individual-level characteristics on methadone maintenance treatment (MMT), after considering the individual characteristics in Taiwan.

METHODS

This study utilized a survey research method. Opioid-dependent patients who participated in the outpatient MMT program in 2009 and met the eligibility criteria were recruited from five hospitals. The impact of MMT on self-perceived health was assessed by using questionnaires. This study assessed the participants' quality of life and treatment outcomes during 3-month follow-up visits, before evaluating the direct effects of regional and individual characteristics. Multilevel linear models were used to estimate whether regional levels influenced individual behavior and treatment outcomes.

RESULTS

Three hundred thirty-four opioid-dependent patients agreed to participate in this study. After the follow-up period, 127 participants completed the study (completion rate = 38%). Participants receiving MMT demonstrated significant improvements in psychological state, HIV risk-taking behavior, social functioning, and health. Regional characteristics, such as the lower than junior high school rate, low-income family rate, and related crime rates, of the study regions were negatively associated with improvements in drug abuse behavior.

CONCLUSIONS

This study shows that MMT can significantly improve the HIV risk-taking behavior and health of the study participants. Disadvantaged regions, however, exhibit poor treatment outcomes. This study suggests actions to minimize the treatment variations between regions.

Decomposing racial and ethnic disparities in the use of postacute rehabilitation care

OBJECTIVE

To determine the degree to which racial and ethnic disparities in the use of postacute rehabilitation care (PARC) are explained by observed characteristics.

DATA SOURCES

State inpatient databases (SIDs) for 2005 and 2006 from four diverse states were used to identify patients with stays for joint replacement, stroke, or hip fracture.

STUDY DESIGN

Our primary outcomes were use of institutional PARC (versus discharge home) and, conditional on discharge to an institution, skilled nursing facility (versus inpatient rehabilitation facility) care. We modified the Oaxaca-Blinder decomposition method to account for the dichotomous outcome and multilevel nature of the data.

DATA COLLECTION/EXTRACTION METHODS

Discharges from the four SIDs were included if the principal diagnosis (stroke, hip fracture) or procedure (joint replacement) was in the sample inclusion criteria.

PRINCIPAL FINDINGS

Observed characteristics explained roughly half of the unadjusted differences in use of institutional PARC. Patient-level factors (clinical, age) were more explanatory of disparities in institutional PARC use, while hospital-level factors were more explanatory of skilled nursing facility versus inpatient rehabilitation facility care.

CONCLUSIONS

Adjustment for characteristics influencing PARC use both mitigated and exacerbated racial/ethnic disparities in use. The degree to which the characteristics explained the disparity varied across conditions and outcomes.

Decomposing gender differences in low-density lipoprotein cholesterol among veterans with or at risk for cardiovascular illness

OBJECTIVES

To measure the extent to which gender differences in poor lipid control among individuals at risk for cardiovascular diseases could be explained by patient-level characteristics.

STUDY DESIGN

Cross-sectional analyses of merged Veteran Health Administration (VHA) and Medicare claims data for the fiscal years (FY) 2002 and 2003 consisting of veterans using VHA facilities and were diagnosed with diabetes or heart disease or hypertension during FY 2002 and had recorded LDL cholesterol values in FY2003 (N = 527,568). There were 10,582 women and 516,986 men veterans. Poor lipid control was defined as LDL cholesterol values ≥130 mg/dL. Multivariate techniques consisted of logistic regressions. Based on the parameter estimates and distribution of individual characteristics, we used a decomposition technique to analyze factors that contributed to the gender difference in poor lipid control.

PRINCIPAL FINDINGS

A significantly higher percent of women (27.4%) than men (17.1%) had LDL cholesterol values ≥130 mg/dL. Of the 10.3 percentage point difference in lipid control, 3.4 percentage points were explained by variables included in the model. The gender difference in poor lipid control was mostly explained by age, physical illnesses, use of lipid lowering medications and depression.

CONCLUSIONS

Only one-third of the gender difference in poor lipid control could be explained by differences in individual characteristics, some of which are modifiable or could be used to identify groups at risk with poor lipid control. Our findings suggest that gender differences in lipid control could be partially reduced by increasing the prescription of lipid lowering drugs and treating depression among women. Interventions that improve lipid control in the non-elderly will also benefit women. However the largest part of the difference in lipid control between women and men remains unexplained and further research is needed to identify additional modifiable and unmodifiable factors.

Remission from substance dependence in U.S. Whites, African Americans, and Latinos

The authors investigated remission from any type of substance dependence in Latinos, African Americans, and Whites using the 2001-2002 National Epidemiologic Survey on Alcohol and Related Conditions, a national sample of community adults. Analyses focused on the 4,520 participants who indicated prior-to-last-year dependence on either alcohol or drugs. Outcome was categorized as current substance dependence or abuse, current use, or abstinence. Whites reported greater likelihood of substance dependence, and African Americans and Latinos were just as likely to remit as Whites once social support and age are controlled. The outcome variable "time to remission" produced a similar pattern of results.

HIV risks and seroprevalence among Mexican American injection drug users in California

Latinos in the United States are an ethnically diverse group disproportionately affected by HIV/AIDS. We describe HIV seroprevalence, HIV risk behaviors and utilization of health services among Mexican American injection drug users (IDUs) in California (n = 286) and compare them to White (n = 830) and African American (n = 314) IDUs. Study participants were recruited from syringe exchange programs (n = 24) in California. HIV seroprevalence among Mexican Americans (0.5%) was dramatically lower than Whites (5%) and African Americans (8%). Mexican Americans reported fewer sex-related risks than Whites and African Americans though injection-related risks remained high. Compared to Whites, Mexican Americans were more likely to participate in drug treatment during a 6 month period (AOR 1.5, 95% CI 1.1, 2.0) but less likely to receive any health care (AOR 0.6, 95% CI 0.5, 0.8). Exploring cultural and structural factors among Mexican American IDUs may offer new insights into how to maintain low rates of HIV seroprevalence and reduce barriers to health care utilization.

Two-year trajectory of stimulant use in 18- to 21-year-old rural African Americans

Little is known about stimulant use trajectories of rural African American youth. The purpose of the present study is to explore substance use over 24 months in 98 African Americans, ages 18 to 21, who used cocaine or methamphetamine 30 days prior to baseline. The majority was male, unemployed, and had not graduated from high school. At baseline, almost half of the participants met criteria for abuse/dependence of cocaine--the primary stimulant used--which decreased to 25% by the final follow-up. Similar decreases were noted in rates of alcohol and marijuana abuse/dependence, although monthly use remained high. Participants reported minimal utilization of mental health or substance abuse services, but demonstrated significant improvements on physical and mental health measures. In summary, cocaine use declined, but other substances were used at high rates, suggesting a significant need for intervention services that address multisubstance use in rural areas.

Alcohol use, abuse, and treatment in people of African descent

The use and abuse of alcohol is prevalent in many nations across the globe, but few studies have examined within-group differences found in people of African descent in the United States, in Africa, and in the Caribbean. A review of current research about alcohol use, abuse, and treatment in people of African descent is presented, including information about risk factors and contributors to alcohol use. Examples of education and prevention interventions are also described. Finally, conclusions based on the review of the research literature as well as recommendations for future research are explained.

Using non-linear decomposition to explain the discriminatory effects of male-female differentials in access to care: a cardiac rehabilitation case study

This paper demonstrates the use of non-linear decomposition for identifying discrimination in referral to a cardiac rehabilitation (CR) program. The application is important because the methods are not commonly applied in this context. A secondary data analysis was conducted on a cohort of 2375 patients eligible for referral (as defined) to an Australian hospital outpatient CR program (1 July 1996 to 31 December 2000) on the basis of inpatient discharge diagnosis codes. Data from a population-based disease register were linked to hospital inpatient statistics and CR program records. Cohort selection was established in accordance with first register recorded hospital separations having specified cardiac inpatient diagnoses for which CR was recommended. Using the existing literature as a guide, multivariate logistic regression methods tested the strength of statistical association between independent variables (or 'endowments') and CR referral. Compared with males, females had 40% fewer odds of being referred. Non-linear decomposition was performed as a post-logistic regression technique to show the extent to which the sex-based inequality in referral (as defined here) was due to group characteristics (the relative distribution of endowments) compared with other influences not adjusted for in the model. The results showed that approximately 18% of the male-female inequality in referral was not explained by group characteristics, and on this basis was 'discriminatory'. The extent to which individual endowments contributed to the explained part of the inequality was also of interest. The methods offer potentially useful tools for informing researchers, policy makers, clinicians and others about unfair discriminatory processes that influence access to health and social services.

Racial and Ethnic Composition as a Correlate of Medication Availability within Addiction Treatment Organizations

Most analyses of racial and ethnic disparities in healthcare focus on individuals rather than organizations. Healthcare organizations may be one mechanism that produces disparities if the representation of minorities within organizations' patient populations is associated with differential patterns of service delivery. This research considers whether the racial and ethnic composition of addiction treatment centers' caseloads is associated with the likelihood that organizations offer any prescription medications to treat addiction, psychiatric conditions, or pain. Data were collected from 288 publicly-funded substance abuse treatment centers in the US. Logistic regression was used to estimate models of medication availability. The percentage of racial and ethnic minority patients was negatively associated with the odds of medication availability, even after controlling for organizational characteristics and patients' diagnostic characteristics. Future research should continue to investigate how healthcare organizations may produce inequalities in access to high-quality care.

Illicit drug use and adverse birth outcomes: is it drugs or context?

Prenatal drug use is commonly associated with adverse birth outcomes, yet no studies have controlled for a comprehensive set of associated social, psychosocial, behavioral, and biomedical risk factors. We examined the degree to which adverse birth outcomes associated with drug use are due to the drugs versus surrounding factors. Data are from a clinical sample of low-income women who delivered at Johns Hopkins Hospital between 1995 and 1996 (n = 808). Use of marijuana, cocaine, and opiates was determined by self-report, medical record, and urine toxicology screens at delivery. Information on various social, psychosocial, behavioral, and biomedical risk factors was gathered from a postpartum interview or the medical record. Multivariable regression models of birth outcomes (continuous birth weight and low birth weight ([LBW] < 2,500 g)) were used to assess the effect of drug use independent of associated factors. In unadjusted results, all types of drug use were related to birth weight decrements and increased odds of LBW. However, only the effect of cocaine on continuous birth weight remained significant after adjusting for all associated factors (-142 g, p = 0.05). No drug was significantly related to LBW in fully adjusted models. About 70% of the unadjusted effect of cocaine use on continuous birth weight was explained by surrounding psychosocial and behavioral factors, particularly smoking and stress. Most of the unadjusted effects of opiate use were explained by smoking and lack of early prenatal care. Thus, prevention efforts that aim to improve newborn health must also address the surrounding context in which drug use frequently occurs.

Are Racial Disparities in Alcohol Treatment Completion Associated With Racial Differences in Treatment Modality Entry? Comparison of Outpatient Treatment and Residential Treatment in Los Angeles County, 1998 to 2000

OBJECTIVE

To determine whether racial and ethnic disparities in publicly funded alcohol treatment completion are due to racial differences in attending outpatient and residential treatment.

METHODS

Statistical analysis of alcohol treatment completion rates using alcohol treatment patients' discharge records from all publicly funded treatment facilities in Los Angeles County from 1998 to 2000 (n = 10,591).

RESULTS

Among these patients, African American (OR = 0.52; 95% CI 0.47, 0.57) and Hispanic (OR = 0.89; 95% CI 0.81, 0.99) patients were significantly less likely to complete treatment as compared with White patients. We found that the odds of being in outpatient versus residential care were 1.42 (95% CI 1.29, 1.55) and 2.05 (95% CI 1.85, 2.26) for African American and Hispanic alcohol treatment patients, respectively, compared with White patients. Adjusting for addiction characteristics, employment, other patient-level factors that might influence treatment enrollment, and unobserved facility-level differences through a random effects regression model, these odds increased to 1.89 (95% CI 1.22, 2.94) for African American and to 2.12 (95% CI 1.40, 3.21) for Hispanics. We developed a conditional probability model to assess the contribution of racial differences in treatment modality to racial disparities in treatment completion. Estimates from this model indicate that were African American and Hispanic patients observed in outpatient care in this population to have the same probability of receiving residential care as White patients with otherwise similar characteristics, the White-African American difference in completion rates would be reduced from 13.64% (95% CI 11.58%, 15.71%) to 11.09% (95% CI 8.77%, 13.23%) and the White-Hispanic difference would disappear, changing from 2.63% (95% CI 0.29%, 4.95%) to -0.45% (-3.52%, 2.43%).

CONCLUSION

It appears that reductions in racial disparities in treatment completion could be gained by increasing enrollment in residential alcohol treatment for African American and Hispanic alcohol abusers in Los Angeles County. Further research addressing why minority alcohol abusers are less likely to receive residential alcohol treatment should be conducted, as well as research that examines why African American alcohol treatment patients have lower completion rates as compared with White patients regardless of treatment modality.