Table 4.
Within-subjects comparisons of the AMED group according to drink-type occasion and student status.
| Means (Standard Deviations) | GEE Results | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Occasion | Student Status | AMED Occasion | AO Occasion | Drink-Type Occasion | Student Status | |||||||||||
| AMED | AO | Student | Non-Student | Student | Non-Student | Student | Non-Student | β | Β SE | IRR | 95% CI | β | β SE | IRR | 95% CI | |
| Drinks/occasion | 5.45 (4.13) |
6.88 (4.52) |
5.51 (3.69) |
7.08 (5.04) |
5.14 (3.66) |
5.87 (4.68) |
5.86 (3.70) |
8.18 (5.12) |
0.23 | 0.03 | 1.26 ** | 1.18–1.35 | 0.25 | 0.06 | 1.29 ** | 1.14–1.45 |
| Drinking days/month | 1.90 (3.05) |
8.18 (6.95) |
4.47 (5.43) |
6.05 (7.13) |
1.54 (2.09) |
2.39 (3.95) |
7.25 (6.13) |
9.36 (7.74) |
1.46 | 0.08 | 4.29 ** | 3.69–4.99 | 0.30 | 0.08 | 1.36 ** | 1.16–1.59 |
| Days drunk/month | 1.53 (2.72) |
3.64 (4.05) |
2.29 (3.19) |
3.06 (4.10) |
1.21 (1.82) |
1.97 (3.56) |
3.32 (3.82) |
4.04 (4.31) |
0.87 | 0.08 | 2.38 ** | 2.04–2.77 | 0.29 | 0.11 | 1.34 * | 1.07–1.67 |
| Binge drinking/month | 1.61 (2.61) |
4.55 (4.45) |
2.73 (3.48) |
3.66 (4.74) |
1.33 (1.99) |
1.99 (3.24) |
4.07 (4.03) |
5.16 (4.89) |
1.04 | 0.08 | 2.83 ** | 2.44–3.28 | 0.29 | 0.10 | 1.34 * | 1.11–1.62 |
| Greatest drinks/month | 5.74 (6.38) |
10.49 (6.73) |
7.42 (6.33) |
9.20 (7.64) |
5.38 (6.23) |
6.22 (6.55) |
9.37 (5.79) |
11.93 (7.56) |
0.60 | 0.05 | 1.83 ** | 1.66–2.00 | 0.22 | 0.07 | 1.24 * | 1.08–1.42 |
| Drinking hours/month | 4.47 (3.65) |
5.95 (3.57) |
4.85 (3.13) |
5.73 (4.25) |
4.20 (3.36) |
4.84 (3.98 |
5.49 (2.74) |
6.54 (4.34) |
0.29 | 0.04 | 1.31 ** | 1.24–1.43 | 0.17 | 0.06 | 1.18 * | 1.05–1.33 |
| Greatest drinks/year | 5.86 (6.13) |
15.81 (8.35) |
9.91 (8.09) |
12.47 (9.65) |
5.28 (5.79) |
6.64 (6.49) |
14.32 (7.48) |
17.73 (9.01) |
0.99 | 0.05 | 2.70 ** | 2.45–2.98 | 0.23 | 0.05 | 1.26 ** | 1.13–1.40 |
| BYAACQ Score | 7.15 (5.30) |
9.63 (5.44) |
7.61 (4.77) |
9.62 (6.21) |
6.33 (4.36) |
8.25 (6.20) |
8.73 (4.84) |
10.89 (5.98) |
0.30 | 0.03 | 1.35 ** | 1.26–1.44 | 0.23 | 0.06 | 1.26 * | 1.12–1.43 |
Notes: ** p < 0.001; * p < 0.05; GEE: Generalized Estimating Equations; AMED: alcohol mixed with energy drink; AO: alcohol-only; IRR: incidence rate ratio.