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Drinking Behavior and Co-morbid Drug Abuse of Study Groups
| Early-Onset | Late-Onset | |||
|---|---|---|---|---|
| FH − | FH + | FH − | FH + | |
| Mean Age of Onset (SD) | 18.98 (2.49) | 19.32 (2.87 | 33.76 (7.45) | 33.03 (7.47) |
| Range | 14–24 | 13–24 | 25–55 | 25–59 |
| Mean Quantity Consumed | 14.87 (6.87) | 13.46 (7.3) | 11.23 (5.87) | 11.69 (7.07) |
| Mean Drinking Frequency | 26.08 (6.94) | 21.9 (10.98) | 24.34 (8.85) | 25.37 (8.13) |
| Mean Years of Heavy Drinking | 15.07 (7.94) | 13.04 (7.19) | 8.65 (6.59) | 8.79 (6.81) |
| % Comorbid Drug Abusers | 72 % | 71 % | 39 % | 48 % |
