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Distribution of drinking frequency classes (ages 13–15) and internalizing outcomes (age 17 years 10 months), by sex
| Variable | Level | Boys, n (%) | Girls, n (%) |
| Drinking frequency | Low | 2,105 (60.7) | 2,105 (58.0) |
| Medium | 982 (28.3) | 1,114(30.7) | |
| High | 383 (11.0) | 411 (11.3) | |
| Depression | No | 1,795(95.6) | 2,159 (89.4) |
| Yes | 83 (4.4) | 255 (10.6) | |
| Anxiety | No | 1,751 (93.2) | 2,055(85.1) |
| Yes | 127 (6.8) | 359 (14.9) |
