TY  - JOUR
PY  - 1992//
TI  - Stages of progression in drug involvement from adolescence to adulthood: further evidence for the gateway theory
JO  - Journal of studies on alcohol
A1  - Kandel, D. B.
A1  - Yamaguchi, K.
A1  - Chen, K.
SP  - 447
EP  - 457
VL  - 53
IS  - 5
N2  - Sequential stages of involvement in alcohol and/or cigarettes, marijuana, other illicit drugs and medically prescribed psychoactive drugs from adolescence to adulthood are investigated in a longitudinal cohort that has been followed from ages 15 to 35. Alternative models of progression are tested for their goodness of fit. Four stages are identified: that of legal drugs, alcohol or cigarettes; marijuana; illicit drugs other than marijuana; and medically prescribed drugs. Whereas progression to illicit drugs among men is dependent upon prior use of alcohol, among women either cigarettes or alcohol is a sufficient condition for progression to marijuana. Age of onset and frequency of use at a lower stage of drug use are strong predictors of further progression.<p /> <p>Language: en</p>
LA  - en
SN  - 0096-882X
UR  - http://dx.doi.org/
ID  - ref1
ER  -