Alcohol outcomes at baseline and postintervention, by treatment group
| Baseline | Postintervention | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Control club members | Intervention club members | Control club members | Intervention club members | Adjusted OR (95% CI)*,† | ICC | Adjusted p-value† | |||
| All | Level three clubs‡ | All | Level three clubs‡ | ||||||
| Graduated frequency index | |||||||||
| Consumption of 5 or more drinks at least once a month at the club | 175 (25%) | 191 (27%) | 120 (31%) | 138 (24%) | 106 (19%) | 76 (20%) | 0.63 (0.40 to 1.00) | 0.18 | 0.05 |
| Overall AUDIT | |||||||||
| Median (min, max) | 7 (0, 26) | 8 (0, 28) | 8 (0, 28) | 7 (0, 25) | 6 (0, 26) | 6 (0, 26) | – | 0.15 | <0.01 |
| Score ≥8 | 330 (46%) | 374 (54%) | 213 (56%) | 259 (45%) | 218 (38%) | 132 (35%) | 0.58 (0.38 to 0.87) | 0.17 | <0.01 |
| AUDIT subscales | |||||||||
| Alcohol consumption subscale (score ≥6) | 402 (57%) | 429 (61%) | 240 (63%) | 314 (55%) | 265 (47%) | 167 (45%) | 0.60 (0.41 to 0.87) | 0.13 | <0.01 |
| Alcohol dependence subscale (score ≥4) | 19 (3%) | 25 (4%) | 12 (3%) | 22 (4%) | 6 (1%) | 5 (1%) | 0.20 (0.06 to 0.65) | 0.12 | <0.01 |
| Alcohol-related problems subscale (score ≥1) | 340 (48%) | 378 (54%) | 214 (56%) | 259 (45%) | 234 (41%) | 142 (38%) | 0.67 (0.43 to 1.03) | 0.12 | 0.07 |
*OR for the interaction term, comparing control group clubs to all intervention group clubs (levels 1, 2 and 3).
†Adjusted for clustering at club level.
‡Members of level 3 clubs that completed the full intervention.
AUDIT, Alcohol Use Disorders Identification Test.