This study examined the role of pretreatment demographic and clinical predictors of attendance as well as barriers to treatment and consumer satisfaction on attendance at therapist-led parent training with 86 families of children ages 3 to 6 years conducted in pediatric primary care settings. Only socioeconomic status (SES) and minority group membership were significantly associated with not completing treatment. Using optimal data analysis procedures, high SES correctly predicted treatment completion 83.6% of the time. Being from a low SES, minority group family correctly predicted noncompletion of treatment 72.7% of the time, but being from a low SES, white family predicted treatment completion 80% of the time. Since barriers to treatment, such as stressors, obstacles to treatment, and treatment demands were unrelated to attendance in the present study, other factors related to social class and minority status that could contribute to better consumer satisfaction and treatment attendance must be investigated.