Tamir A, Wolff H, Epstein L
J Adolesc Health Care. 1982 Jun;2(4):261-5. doi: 10.1016/s0197-0070(82)80060-0.
Eight hundred and four high school students were interviewed about selected health-related behaviors in an effort to determine the interrelationships of these characteristics. We found the age of onset and present use of cigarettes by the adolescents to be positively correlated to their use of hashish and having sexual intercourse. The use of hashish and having sexual intercourse were also positively related with each other and the use of hashish to drinking alcohol.