Study
Hogue and colleagues (2015) conducted a randomized trial to test the impact of Family Therapy on adolescent conduct problems, delinquency, and substance use. Participants were youth from inner-city areas of a large northeastern city, who were referred for services from high schools, family service agencies, and community programs in the area. To be included in the study, adolescent participants had to 1) be between ages 12–18; 2) be willing to participate in treatment along with a primary caregiver; 3) not be enrolled in any other behavioral treatment; 4) have a family whose health benefits met the requirements of study treatment sites, and 5) meet criteria for either the mental health (MH) or substance use (SU) study track. Adolescents were placed in the MH track if they met the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM–IV–TR; American Psychiatric Association, 2000) diagnostic criteria for either oppositional defiant disorder or conduct disorder. They were placed in the SU track if they 1) reported at least 1 day of alcohol use to intoxication or illegal drug use in the past 30 days, 2) had one or more DSM-IV-TR symptoms of alcohol or substance dependence/abuse, and 3) met criteria for outpatient SU treatment. Youth who met criteria for both tracks were placed in the SU track.
Randomization to study condition was conducted at the completion of baseline interviews and based on four variables: ethnicity (Hispanic, African American, other), sex, juvenile justice involvement (yes or no), and study track (MH or SU). Participants were randomly assigned to either 1) Usual Care-Family Therapy (UC-FT), a single community mental health clinic that practiced nonmanualized, structural-strategic family therapy as the routine standard of care for youth behavior problems and featured licensed Marriage and Family Therapists (MFTs) (treatment group); or 2) a Usual Care-Other (UC-Other) control group, which consisted of five treatment sites typically known for treating problem behaviors (e.g., community mental health clinics, outpatient psychiatry clinics, and drug counseling centers) offering a full spectrum of therapeutic services normally available to adolescent clients, including cognitive–behavioral therapy or motivational interviewing. None of the sites in the UC-Other condition conducted family therapy as a routine intervention, nor did they contain a supervisor or staff therapist who reported being a licensed MFT. All six study sites were outpatient clinical settings that accepted referrals and were easily accessible via public transportation.
Of the 205 study participants, 104 were assigned to the UC-FT group, and 101 to the UC-Other group. Overall, 52 percent of the sample were male. The average age of participants was 15.7 years. More than half (59 percent) were Hispanic, 21 percent were African American, 15 percent were multiracial, and 6 percent were other. Caregivers included 171 biological mothers, 7 biological fathers, 4 adoptive parents, 1 stepparent, 2 foster parents, 12 biological grandmothers, and 8 other relatives. In terms of household composition, 66 percent were headed by single parents, 26 percent by two parents, 6 percent by grandparents, and 2 percent by some other combination. However, the only statistically significant difference between the UC-FT treatment group and the UC-Other control group was that control group participants were more likely to have a household member involved in illegal activities.
The outcomes of interest were 1) adolescent- and parent-reported internalizing and externalizing behaviors, and 2) adolescent-reported substance use and delinquency. Analyses were conducted using a two-study condition by four repeated measures intent-to-treat design. Study condition (UC-FT versus UC-Other) and study track (MH versus SU) were used to test the initial status of each outcome of interest and any change over time. A latent growth curve model was used to assess adolescent and caregiver reports of externalizing and internalizing behaviors, which were measured using the Child Behavior Checklist and the Youth Self Report. A two-part growth model was used to assess delinquency and substance use, using the National Youth Survey Self-Report Delinquency Scale and the Timeline Follow Back Method. Outcomes were measured at baseline and at 3, 6, and 12 months. The study authors did not conduct subgroup analyses.