This paper analyzes data from interviews with 167 drug users in the community, including age, sex, birth order, education, family constellation, and circumstances of first drug use. The majority of subjects had tried to stop using drugs, but most had been unsuccessful at the time of the interview. (Author)

A description of the socio-demographic characteristics associated with student drug use is discussed. Findings indicate that while drug usage began to increase in the seventh grade, substantial increases occurred after this grade level. For all substances, drug use peaked in the ninth or tenth grade with dramatic decreases in the twelfth grade.…

The 26,316 patients who entered drug therapy programs participating in the DARP from June, 1971, to March, 1973, and who had used drugs for at least two years were grouped into three drug use categories. Differences were observed among these three groups regarding the first drug used daily and the age at first drug use. (Author)