As. Friedman et al., EARLY TEENAGE SUBSTANCE USE AS A PREDICTOR OF EDUCATIONAL-VOCATIONAL FAILURE, The American journal on addictions, 3(4), 1994, pp. 325-336
The authors report on the relationship of early adolescent substance u
se (up to the time of the 16th birthday) to educational-vocational per
formance in the early adulthood of 612 African-American urban subjects
. Voluminous prospective data were available on the behavior, test per
formance, and families of 612 urban African-American subjects, from bi
rth up to 7 years of age. Scarcer prospective data were available for
school performance during later years of school. Control variables wer
e derived from these data to determine the amount of variance in each
dependent educational-vocational outcome variable that was accounted f
or, independently of the amount of variance accounted for by early sub
stance use.