Comparison of outcomes for clients in randomized versus open trials of treatment for alcohol use disorders

The forest and the trees: relational and specific factors in addiction treatment

AIMS

Increased expectations for the use of evidence-based methods in addiction treatment have fueled a debate regarding the relative importance of 'specific' versus 'common' factors in treatment outcome. This review explores the influence of these factors on addiction treatment outcome.

METHODS

The authors review and link findings from four decades of research on specific and general factors in addiction treatment outcome research.

FINDINGS

Although few would argue that what one does in addiction treatment is immaterial, outcome studies tend to find small to no difference when specific treatment methods are compared with each other or with treatment as usual. In contrast, there are usually substantial differences among therapists in client outcomes, and relational factors such as therapist empathy and therapeutic alliance can be significant determinants of addiction treatment outcome.

CONCLUSIONS

In addiction treatment, relational factors such as empathy, which are often described as common, non-specific factors, should not be dismissed as 'common' because they vary substantially across providers and it is unclear how common they actually are. Similarly they should not be relegated to 'non-specific' status, because such important relational influences can be specified and incorporated into clinical research and training.

When Technology Fails: Getting Back to Nature

Research on substance use disorders has produced a slew of disappointments in studies designed to confirm basic principles of the technology approach to treatment dissemination. These setbacks should inspire addictions science to pursue complementary paths of inquiry that focus on evidence-based practices delivered under naturalistic conditions. This will require larger accommodations to, and closer partnerships with, the indigenous cultures of everyday care.

Outcomes of patients who participate in randomized controlled trials compared to similar patients receiving similar interventions who do not participate

BACKGROUND

Some people believe that patients who take part in randomised controlled trials (RCTs) face risks that they would not face if they opted for non-trial treatment. Others think that trial participation is beneficial and the best way to ensure access to the most up-to-date physicians and treatments. This is an updated version of the original Cochrane review published in Issue 1, 2005.

OBJECTIVES

To assess the effects of patient participation in RCTs ('trial effects') independent both of the effects of the clinical treatments being compared ('treatment effects') and any differences between patients who participated in RCTs and those who did not. We aimed to compare similar patients receiving similar treatment inside and outside of RCTs.

SEARCH STRATEGY

In March 2007, we searched The Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, The Cochrane Methodology Register, SciSearch and PsycINFO for potentially relevant studies. Our search yielded 7586 new references. In addition, we reviewed the reference lists of relevant articles.

SELECTION CRITERIA

Randomized studies and cohort studies with data on clinical outcomes of RCT participants and similar patients who received similar treatment outside of RCTs.

DATA COLLECTION AND ANALYSIS

At least two review authors independently assessed studies for inclusion, assessed study quality and extracted data.

MAIN RESULTS

We identified 30 new non-randomized cohort studies (45 comparisons): no new RCTs were found. This update now includes five RCTs (yielding 6 comparisons) and 80 non-randomized cohort studies (130 comparisons), with 86,640 patients treated in RCTs and 57,205 patients treated outside RCTs. In the randomised studies, patients were invited to participate in an RCT or not; these comparisons provided limited information because of small sample sizes (a total of 412 patients) and the nature of the questions they addressed. When the results of RCTs and non-randomized cohorts that reported dichotomous outcomes were combined, there were 98 comparisons; there was also heterogeneity (P < 0.00001, I(2) = 42.2%) between studies. No statistical significant differences were found for 85 of the 98 comparisons. Eight comparisons reported statistically significant better outcomes for patients treated within RCTs, and five comparisons reported statistically significant worse outcomes for patients treated within RCTs. There was significant heterogeneity (P < 0.00001, I(2) = 58.2%) among the 38 continuous outcome comparisons. No statistically significant differences were found for 30 of the 38 comparisons. Three comparisons reported statistically significant better outcomes for patients treated within RCTs, and five comparisons reported statistically significant worse outcomes for patients treated within RCTs.

AUTHORS' CONCLUSIONS

This review indicates that participation in RCTs is associated with similar outcomes to receiving the same treatment outside RCTs. These results challenge the assertion that the results of RCTs are not applicable to usual practice.

Six- and twelve-month outcomes among homeless youth accessing therapy and case management services through an urban drop-in center

RESEARCH OBJECTIVE

To evaluate the impact of case management and individual therapy offered through a drop-in center for homeless youth on substance use, mental health, housing, education, employment, and medical care utilization.

STUDY POPULATION

All youth (n=172) between the ages of 14-24 who accessed treatment services through an urban, southwestern drop-in center were included.

DATA SOURCE

Semistructured and self-report questionnaires were administered to youth between October 2002 and April 2005.

STUDY DESIGN

A repeated measures design was utilized. Youth were assessed at baseline, 6 months, and 12 months postbaseline. Hierarchical linear modeling was used to test the hypotheses.

PRINCIPAL FINDINGS

Statistically significant improvements were found in substance abuse, mental health, and percent days housed up to 12 months postbaseline. Decreased alcohol and drug use was associated with an increase in housing. However, most youth did not acquire permanent housing, and education, employment, and medical service utilization did not significantly change over time.

CONCLUSIONS

While treatment offered through drop-in centers for homeless youth can positively impact homeless youth, policy, funding, and service provision need greater focus, collaboration, and support if youth homelessness is to be successfully addressed.

A Randomized Trial of a DWI Intervention Program for First Offenders: Intervention Outcomes and Interactions With Antisocial Personality Disorder Among a Primarily American-Indian Sample

BACKGROUND

Randomized trial evidence on the effectiveness of incarceration and treatment of first-time driving while intoxicated (DWI) offenders who are primarily American Indian has yet to be reported in the literature on DWI prevention. Further, research has confirmed the association of antisocial personality disorder (ASPD) with problems with alcohol including DWI.

METHODS

A randomized clinical trial was conducted, in conjunction with 28 days of incarceration, of a treatment program incorporating motivational interviewing principles for first-time DWI offenders. The sample of 305 offenders including 52 diagnosed as ASPD by the Diagnostic Interview Schedule were assessed before assignment to conditions and at 6, 12, and 24 months after discharge. Self-reported frequency of drinking and driving as well as various measures of drinking over the preceding 90 days were available at all assessments for 244 participants. Further, DWI rearrest data for 274 participants were available for analysis.

RESULTS

Participants randomized to receive the first offender incarceration and treatment program reported greater reductions in alcohol consumption from baseline levels when compared with participants who were only incarcerated. Antisocial personality disorder participants reported heavier and more frequent drinking but showed significantly greater declines in drinking from intake to posttreatment assessments. Further, the treatment resulted in larger effects relative to the control on ASPD than non-ASPD participants.

CONCLUSIONS

Nonconfrontational treatment may significantly enhance outcomes for DWI offenders with ASPD when delivered in an incarcerated setting, and in the present study, such effects were found in a primarily American-Indian sample.

Outcomes of patients who participate in randomised controlled trials compared to similar patients receiving similar interventions who do not participate

BACKGROUND

Some people believe that patients who take part in randomised controlled trials (RCTs) face risks that they would not face if they opted for non-trial treatment. Others think that trial participation is beneficial and the best way to ensure access to the most up to date physicians and treatments.

OBJECTIVES

To assess the effects of patient participation in RCTs ('trial effects') independent both of the effects of the clinical treatments being compared ('treatment effects') and any differences between patients who participated in RCTs and those who did not.

SEARCH STRATEGY

In May 2001, we searched The Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, EMBASE, The Cochrane Methodology Register, SciSearch and PsycINFO for potentially relevant studies. Our search yielded over 10,000 references. In addition, we reviewed the reference lists of relevant articles and wrote to over 250 investigators to try to obtain further information.

SELECTION CRITERIA

Randomised studies and cohort studies with data on clinical outcomes of RCT participants and similar patients who received similar treatment outside of RCTs.

DATA COLLECTION AND ANALYSIS

At least two reviewers independently assessed studies for inclusion, assessed study quality and extracted data. Study authors were contacted for additional information.

MAIN RESULTS

We included five randomised studies (yielding 6 comparisons) and 50 non-randomised cohort studies (85 comparisons), with 31,140 patients treated in RCTs and 20,380 patients treated outside RCTs. In the randomised studies, patients were invited to participate in an RCT or not; these comparisons provided limited information because of small sample sizes (a total of 412 patients) and the nature of the questions they addressed. There was statistically significant heterogeneity (P < 0.002, I(2) = 36.2%) among the 73 dichotomous outcome comparisons; none of the potential explanatory factors we investigated helped to explain this heterogeneity. No statistically significant differences were found for 63 of the 73 comparisons. Eight comparisons reported statistically significant better outcomes for patients treated within RCTs, and two comparisons reported statistically significant worse outcomes for patients treated within RCTs. There were no statistically significant differences in heterogeneity (P = 0.53, I(2) = 0%) or in outcomes (SMD 0.01, 95% CI -0.10 to 0.12) of patients treated within and outside RCTs in the 18 comparisons which had used continuous outcomes.

AUTHORS' CONCLUSIONS

This review indicates that participation in RCTs is not associated with greater risks than receiving the same treatment outside RCTs. These results challenge the assertion that the results of RCTs are not applicable to usual practice.

Predictors of 16-Year Mortality Among Individuals Initiating Help-Seeking for an Alcoholic Use Disorder

BACKGROUND AND METHODS

We examined rates and predictors of mortality in individuals (47% women) who had just initiated help-seeking for their alcohol use disorders (AUDs) at the start of the study (n=628) and were followed for 16 years.

RESULTS

For both women and men, the observed-to-expected mortality ratio (1.4) was lower than rates found in samples of treated individuals with AUDs, suggesting that those initiating help-seeking careers have better chances of long-term survival. Of the individuals for whom cause of death was known, 68% died of alcohol-related causes. Men were more likely to die than were women. When gender was controlled, individuals who were older and unmarried and had more alcohol dependence symptoms at baseline were more likely to die over the 16-year period. When these baseline characteristics were controlled, better drinking outcomes at 1 year were associated with a lower likelihood of subsequent death. The combination of a shorter duration of inpatient/residential care and better drinking outcomes at 1 year was related to a lower probability of death, as was the combination of a longer duration of outpatient care or Alcoholics Anonymous attendance and better drinking outcomes at 1 year.

CONCLUSIONS

Efforts should be made to help providers identify individuals who are not responding positively to inpatient or residential treatment and intervene to motivate participation in continuing outpatient care and community 12-step self-help groups to reduce the likelihood of a chronic and fatal AUD course.

Are racial and ethnic minorities less willing to participate in health research?

BACKGROUND

It is widely claimed that racial and ethnic minorities, especially in the US, are less willing than non-minority individuals to participate in health research. Yet, there is a paucity of empirical data to substantiate this claim.

METHODS AND FINDINGS

We performed a comprehensive literature search to identify all published health research studies that report consent rates by race or ethnicity. We found 20 health research studies that reported consent rates by race or ethnicity. These 20 studies reported the enrollment decisions of over 70,000 individuals for a broad range of research, from interviews to drug treatment to surgical trials. Eighteen of the twenty studies were single-site studies conducted exclusively in the US or multi-site studies where the majority of sites (i.e., at least 2/3) were in the US. Of the remaining two studies, the Concorde study was conducted at 74 sites in the United Kingdom, Ireland, and France, while the Delta study was conducted at 152 sites in Europe and 23 sites in Australia and New Zealand. For the three interview or non-intervention studies, African-Americans had a nonsignificantly lower overall consent rate than non-Hispanic whites (82.2% versus 83.5%; odds ratio [OR] = 0.92; 95% confidence interval [CI] 0.84-1.02). For these same three studies, Hispanics had a nonsignificantly higher overall consent rate than non-Hispanic whites (86.1% versus 83.5%; OR = 1.37; 95% CI 0.94-1.98). For the ten clinical intervention studies, African-Americans' overall consent rate was nonsignificantly higher than that of non-Hispanic whites (45.3% versus 41.8%; OR = 1.06; 95% CI 0.78-1.45). For these same ten studies, Hispanics had a statistically significant higher overall consent rate than non-Hispanic whites (55.9% versus 41.8%; OR = 1.33; 95% CI 1.08-1.65). For the seven surgery trials, which report all minority groups together, minorities as a group had a nonsignificantly higher overall consent rate than non-Hispanic whites (65.8% versus 47.8%; OR = 1.26; 95% CI 0.89-1.77). Given the preponderance of US sites, the vast majority of these individuals from minority groups were African-Americans or Hispanics from the US.

CONCLUSIONS

We found very small differences in the willingness of minorities, most of whom were African-Americans and Hispanics in the US, to participate in health research compared to non-Hispanic whites. These findings, based on the research enrollment decisions of over 70,000 individuals, the vast majority from the US, suggest that racial and ethnic minorities in the US are as willing as non-Hispanic whites to participate in health research. Hence, efforts to increase minority participation in health research should focus on ensuring access to health research for all groups, rather than changing minority attitudes.

The 8-Year Course of Alcohol Abuse: Gender Differences in Social Context and Coping

BACKGROUND

The aim of this study was to compare women (n=230) and men (n=236) who had alcohol use disorders in terms of social context and coping methods and in terms of changes in these indices associated with participation in professional treatment and Alcoholics Anonymous (AA).

METHODS

Initially untreated problem drinkers were followed up for 8 years.

RESULTS

Women and men did not differ in regard to the type of help received, but women had longer professional treatment. At baseline, women had more stressors and fewer resources from family and relied more on avoidance coping and drinking to cope. During the next 8 years, women, more so than men, increased on approach coping and reduced their use of avoidance coping and drinking to cope. When baseline status was controlled, women had better social resource, coping, and drinking outcomes than men did at 1 year and 8 years. A longer duration of professional treatment during year 1 was associated with improved approach coping among men but not women. A longer duration of AA attendance during year 1 and the full 8 years was associated with more resources from friends, more use of approach coping, and less drinking to cope. In turn, more friends resources and approach coping and less drinking to cope were associated with better drinking outcomes. Decreases in avoidance coping and drinking to cope were more strongly associated with better drinking outcomes among men than among women.

CONCLUSIONS

It may be important to target men for formal services or self-help to increase their use of approach coping in efforts to maintain abstinence. Women's strategies for improving their social context need further explication to be adapted for transfer to male problem drinkers.

A randomised clinical trial of in-patient versus combined day hospital treatment of alcoholism: primary and secondary outcome measures

In Germany, the treatment system for alcoholics is predominantly in-patient (IP) oriented, but no randomised trials of setting effects have been conducted until now. We examined if detoxification treatment offered in a day clinic setting would lead to results comparable to the usual IP treatment. After initial IP detoxification, patients (n = 109) at a standard withdrawal treatment unit were randomly assigned to IP or day hospital groups. In both settings, identical psychosocial treatment was given. In this article, results of primary (percent days abstinent and drinks per drinking day) and secondary outcome measures (relapses during treatment, premature termination, additional hospitalisation during follow-up, percent of voluntary abstinent days and continuous abstinence) are reported. Outcome measures were assessed quarterly during a 1-year follow-up period. Patients improved significantly after both treatments, but we found no significant setting or setting x time interaction effects for any primary or secondary outcome measure.

Gender differences in help-utilization and the 8-year course of alcohol abuse

AIMS

The aim of this study was to compare initially untreated women and men problem drinkers on help-utilization and outcomes over 8 years.

DESIGN AND PARTICIPANTS

At the time of the 8-year follow-up, individuals (N=466, 49% female) had self-selected into four groups: no help, Alcoholics Anonymous (AA) only, formal treatment only or formal treatment plus AA.

MEASUREMENTS

At baseline and 1, 3 and 8 years later, participants completed measures of drinking and functioning.

FINDINGS

Women were generally worse off than men on baseline drinking and functioning indices. In keeping with their poorer baseline status, women were more likely to participate in AA, and had longer in-patient stays during the next year. When women's baseline status was controlled, women had better outcomes than did men at 1 and 8 years. Generally, women and men did not differ on the extent to which obtaining help, or a particular type of help, was related to improved outcomes. Regarding drinking outcomes, women benefited more than did men from more AA attendance during years 2-8 of follow-up.

CONCLUSIONS

The results suggest that although alcoholism interventions were designed primarily for men, they are currently delivered in ways that are also useful to women. Problem-drinking women appear to benefit from sustained participation in AA, which emphasizes bonding with supportive peers to maintain abstinence.

Mesa Grande: a methodological analysis of clinical trials of treatments for alcohol use disorders

AIM

A 3-year update with 59 new controlled trials is provided for the ongoing Mesa Grande project reviewing clinical trials of treatments for alcohol use disorders. The project summarizes the current evidence for various treatment approaches, weighting findings differentially according to the methodological strength of each study.

DESIGN

The review includes 361 controlled studies that (1) evaluated at least one treatment for alcohol use disorders, (2) compared it with an alternative condition (such as a control group, a placebo, a brief intervention or an alternative treatment), (3) used a procedure designed to create equivalent groups before treatment and (4) reported at least one outcome measure of drinking or alcohol-related consequences. Studies were rated by two reviewers on 12 methodological criteria, and outcome logic was analyzed for the specific treatment modalities tested.

FINDINGS

Methodological quality of studies was significantly but modestly correlated with the reporting of a specific effect of treatment. Among psychosocial treatments, strongest evidence of efficacy was found for brief interventions, social skills training, the community reinforcement approach, behavior contracting, behavioral marital therapy and case management. For the first time, two pharmacotherapies also appeared among the most strongly supported approaches: opiate antagonists (naltrexone, nalmefene) and acamprosate. Least supported were methods designed to educate, confront, shock or foster insight regarding the nature and causes of alcoholism.

CONCLUSIONS

Treatment methods differ substantially in apparent efficacy. It would be sensible to consider these differences in designing and funding treatment programs.