Table 1.
Descriptives on age of alcohol initiation and indicators of alcohol use disorders in 2666 young adult twins from a population-based twin study.
| Females | Males | Female/male risk ratio (95%CI) | |
|---|---|---|---|
| Age of alcohol initiation, years | 16.3 (2.12)a | 16.1 (2.06)a | - |
| Life-time DSM-IV alcohol dependence | 4.1% (69)b | 11.0% (106)b | 2.71 (2.02 – 3.63) |
| Life-time DSM-IV alcohol abuse | 3.3% (56) | 11.3% (108) | 3.41 (2.49 – 4.66) |
| Binge drinking (5+ units) | |||
| 0–12 times per year | 83.1% (1396) | 66.4% (632) | 0.80 (0.76 – 0.84) |
| 2–4 times per month | 14.8% (249) | 25.0% (238) | 1.69 (1.44 – 1.98) |
| 1–2 times per week or more often | 2.1% (35) | 8.6% (82) | 4.10 (2.88 – 6.37) |
| Self-perceived life-time high alcohol consumption | |||
| No | 80.0% (1346) | 71.2% (676) | 0.89 (0.85 – 0.93) |
| Maybe | 9.3% (157) | 11.8% (112) | 1.26 (1.01 – 1.58) |
| Yes | 10.7% (180) | 17.1% (162) | 1.59 (1.31 – 1.94) |
a
Mean and SD (all such values).
b
Percentage and frequency (all such values).