Non-medical drug use behaviour at five United States universities: a 15-year study.

A survey carried out in 1970, 1973, 1976, 1980 and 1984 by means of a questionnaire at five American universities, which involved a total of 4,171 students, showed an increase in the use of cocaine, cannabis, hallucinogens, sedatives, amphetamines and alcohol. Cocaine use increased from 2.7 per cent in 1970 to 30 per cent in 1984, while cannabis use almost doubled during that period. The survey found that intercollegiate athletes used significantly more anabolic steroids than non-athletes, but with regard to the use of other substances the athletic students did not differ significantly from non-athletic students.