Table 1.

Descriptive statistics of demographic and psychopathology background (N=401).

Variable	Mean	Std. Dev.
Age at first symptomatology assessment	10.40	2.09
Age at last symptomatology assessment	21.72	1.59
Gender (male)	72.82%	2.22%
Children of Alcoholics (COA)	64.34%	2.39%
Average parental education (years)	13.59	1.80
Family income at baseline (dollars in the 1980’s)	34,950	16,423
Delinquency T-score at drinking onset	53.73	5.44
Age at onset of regular drinking	16.21	2.08
Early onset of drinking (age of first drink <=14)	52.87%	2.49%
Lifetime DSM-IV alcohol abuse diagnosis*	53.87%	2.49%
Lifetime DSM-IV alcohol dependence diagnosis*	23.19%	2.11%
Lifetime DSM-IV AUD diagnosis	61.10%	2.43%
Age at onset of DSM-IV alcohol abuse diagnosis	17.06	2.08
Age at onset of DSM-IV alcohol dependence diagnosis	17.98	1.96
Age at onset of DSM-IV AUD diagnosis	17.02	2.05

^*The alcohol abuse and alcohol dependence diagnoses were coded independently.