Table 2.
Summary statistics for longitudinal outcomes and covariates. Mean (SE) is reported for continuous variables and percentage (SE) is reported for categorical variables
| Variable | Range/labels | W1, % | W2, % | W3, % | W4, % |
| Drinking | No | 64.4 (2.2) | 64.5 (2.2) | 59.5 (2.1) | 46.5 (2.2) |
| Yes | 35.6 (2.2) | 35.5 (2.2) | 40.5 (2.1) | 53.5 (2.2) | |
| Heavy episodic drinking | No | 72.6 (1.9) | 74.9 (2.4) | 71.0 (2.1) | 58.8 (2.4) |
| Yes | 27.4 (1.9) | 25.1 (2.4) | 29.0 (2.1) | 41.2 (2.4) | |
| 2-hour heavy episodic drinking | No | 76.2 (1.8) | 78.4 (2.2) | 76.3 (2.2) | 65.5 (2.3) |
| Yes | 23.8 (1.8) | 21.6 (2.2) | 23.7 (2.2) | 34.5 (2.3) | |
| Depressive symptoms | 1–5 | 2.34 (0.03) | 2.08 (0.03) | 2.03 (0.05) | 2.01 (0.04) |
| Never | 64.4 (2.2) | 66.6 (1.8) | 62.7 (2.3) | 54.2 (2.5) | |
| 5 friends drinking | Almost never/sometimes | 25.0 (1.3) | 23.3 (1.4) | 25.4 (1.5) | 30.5 (2.0) |
| Often/always | 10.6 (1.2) | 10.1 (1.3) | 11.9 (1.7) | 15.3 (1.9) | |
| Parental knowledge | 1–4 | 2.35 (0.02) | 2.32 (0.02) | 2.30 (0.03) | – |
| Parental expectations | 1–7 | 5.85 (0.07) | 5.66 (0.08) | 5.49 (0.09) | – |
| Working status | Not working | – | – | – | 50.3 (2.6) |
| 20 hours or less | – | – | – | 20.4 (1.8) | |
| 21–30 hours | – | – | – | 13.8 (1.2) | |
| >30 hours | – | – | – | 15.4 (1.6) | |
| Residential status | Parent’s home | – | – | – | 56.1 (2.3) |
| On campus | – | – | – | 15.7 (1.5) | |
| Own place | – | – | – | 28.2 (2.2) | |
| School status | Not attending | – | – | – | 27.2 (1.9) |
| Technical school/community college | – | – | – | 28.9 (1.7) | |
| College/university | – | – | – | 43.9 (2.4) |
Note: W = wave.