Retention of African-American and White youth in a longitudinal substance use study.

The current investigation discusses successful strategies used to retain N = 405 African-American and White target youth in a longitudinal, non-intervention study focused on alcohol and other drug use. Ninety-one percent of youth remained in the study for all 4 years, including 87% of African-Americans and 96% of Whites. In a logistic regression model incorporating age, ethnicity, income, sex, parent/guardian marital status, parent alcohol use, and family cohesion, only sex significantly predicted retention, with girls being more likely to remain in the study compared with boys, although ethnicity neared significance.