Relationship between drug preference and indicators of psychiatric impairment.

This study was conducted to investigate the relationship between the indicators of psychiatric disorders of individuals and their choice of either cocaine or heroin, drugs that differ markedly in their pharmacological effects. Cocaine acts as an intense stimulant, and heroin has profound sedative effects. This investigation examined the relationship between preference for heroin or cocaine and indicators of psychiatric impairment. Data from 282 subjects were grouped according to drug of choice and analyzed. Ninety-three percent of these subjects were African-American, 32% were female, and the average age was 34. Univariate and multivariate statistical analyses, such as discriminant analyses, were used to determine group differences. The results are evaluated and interpreted in relation to both the current empirical findings and to the hypotheses and theories postulated as a result of earlier clinical observations on drug of choice and psychopathology. Discriminant analysis yielded an overall correct classification rate of 75%. The discriminant function suggests that members in the cocaine drug of choice group as contrasted with members in the heroin preference group can be characterized as more socially inhibited and more self-defeating after adjusting for differences in age, duration of use of illicit substances, and marital status. Those who favored cocaine as contrasted with those who favored heroin were more likely to have never married, be younger, and have used illicit substances for a shorter period of time.

Treatment services in two national studies of community-based drug abuse treatment programs.

Findings from a number of sources over the past decade have documented a decline in the resources available for drug abuse treatment and the services being provided to clients in community-based drug abuse treatment programs. We compared client reports of services received and unmet service needs in a national crossmodality sample of clients in two studies of drug abuse treatment: the Treatment Outcome Prospective Study (TOPS), 1979-1981, and the Drug Abuse Treatment Outcome Study (DATOS), 1991-1993. Findings showed a marked decrease over the past decade in the number and variety of services clients reported receiving. Most striking was the large increase in self-reported unmet service needs in the DATOS investigation. Although most clients reported having received at least some sessions of drug abuse counseling during treatment and the level of satisfaction with treatment and services was generally high across modalities, client reports indicated that drug abuse counseling alone did not address their wider ranging service needs. Programs in the methadone modality generally reflected the lowest level of drug abuse counseling and services.

Issues to consider when predicting retention in therapeutic communities.

Many studies have focused on retention in therapeutic communities (TCs) because research shows that retention is an important predictor of client outcomes from these programs. A comparison of the three largest studies found there was little overlap between predictors of retention in TCs. Treatment Outcome Prospective Study data were analyzed to assess whether these findings may have been due to differences in times when the data were collected, measures of length of stay, and domains of variables used to predict retention. While the results suggest that each of these factors contributed to some differences between predictors of retention, the predictors still were unable to explain more than a small amount of the variance in retention. Research indicates that other variables need to be taken into account if future studies are to be more successful in predicting retention in TCs.

Do methadone patients substitute other drugs for heroin? Predicting substance use at 1-year follow-up.

Data were analyzed from the nationwide Treatment Outcome Prospective Study (TOPS) to assess whether current and former methadone patients substitute other drugs for heroin. The sample comprised 513 heroin users who were admitted to methadone programs in 10 cities across the United States and followed for at least 1 year. Structured face-to-face interviews were administered at admission and at follow-up to assess use of six substances: cocaine, amphetamines, illegal methadone, tranquilizers, marijuana, and alcohol. The study found a decline in the use of all substances except alcohol. Patients who substantially reduced or eliminated their use of heroin during the follow-up year were more likely to decrease their use of other drugs than were patients who continued to use heroin on a weekly or more frequent basis. These findings suggest that methadone programs indirectly reduce patients' use of cocaine, amphetamines, illegal methadone, tranquilizers, and marijuana, insofar as they are successful in eliminating or decreasing heroin use. Similar reductions in drug use were found among patients who were not enrolled in methadone programs during the follow-up year. These findings do not support the commonly held belief that heroin addicts substitute other drugs for heroin.

Exposure to methadone programs and heroin use.

The aims of this study were to: (a) assess the effects of various patterns of exposure to methadone programs on heroin use; (b) assess the effects of other patient, program, and treatment variables; and (c) identify variables that promote the type of exposure to methadone programs that is most effective for reducing heroin use. The sample was 526 patients who were admitted from 1979 to 1981 into 17 methadone programs that participated in the Treatment Outcome Prospective Study. The study differs from previous research in that it addresses the time that patients spent in methadone programs during the follow-up period in defining exposure patterns. Heroin use was lowest among patients who were continuously exposed to methadone programs. Retention was highest among patients who attended programs that informed them of their methadone dose levels, were easy to access, and provided them with high quality social services.

Predicting cocaine use among methadone patients: analysis of findings from a national study.

Findings from a large-scale national study of clients admitted to publicly funded drug treatment programs between 1979 and 1981 were used to determine whether cocaine use by current and former methadone patients could be predicted. The sample for this analysis comprised 526 daily or weekly heroin users admitted to 17 methadone maintenance programs. The study found that cocaine use by both current and former methadone patients showed an overall decline during the follow-up year; that patients who stopped using heroin after entering treatment were much more likely to quit using cocaine than were their heroin-using counterparts; and that the odds of initiating cocaine use after admission to a methadone program were much higher among patients who continued using heroin. These findings suggest that methadone programs may be able to reduce cocaine use among some patients by improving their effectiveness in reducing heroin use.

Choice of payment plan in the Medicare capitation demonstration.

This article identifies factors that influence the choice between joining an HMO and remaining with the traditional fee-for-service system among aged Medicare beneficiaries in three communities. Sources of marketing information were found to be strongly and positively related to the decision to join the HMO. Among beneficiaries who had to switch providers to join, persons who had a prior usual source of care and those who were satisfied with the amount of paperwork required to use that source of care were less likely to enroll in the HMO. Persons who did not have to switch providers to join the HMO were more likely to enroll in the prepaid program if they were satisfied with the amount of paperwork involved in using the HMO prior to the demonstration. Differences among the three communities suggest that the barrier to HMO enrollment presented by having a prior source of care who is not affiliated with the HMO may attenuate as the number of competing HMOs in the community increases, making the medical care environment more competitive. In the community with the most HMOs, persons who already had supplemental insurance were less likely to enroll than those who did not. None of the six HMOs studied experienced adverse selection, based on pre-enrollment health status.