Table 1.
Baseline characteristics of students with risky alcohol use in a randomized brief intervention smartphone app trial.
| Characteristic | Total (n = 2166) | PartyPlanner (n = 722) | Promillekoll (n = 722) | Control (n = 722) | p-Values a |
|---|---|---|---|---|---|
| Gender: M (%)/F (%) | 704 (32.5)/1462 (67.5) | 206 (31.3)/496 (68.7) | 226 (31.2)/497 (68.8) | 253 (35.0)/469 (65.0) | 0.203 |
| Age: mean (SD) | 25.84 (6.57) | 25.73 (6.38) | 25.84 (6.36) | 25.93 (6.94) | 0.844 |
| Measures of alcohol consumption: means (SD) |
|||||
| Alcohol Use Disorders Identification Test (AUDIT) score (scale 0–40) | 10.98 (4.33) | 10.98 (4.40) | 10.96 (4.21) | 10.99 (4.38) | 0.992 |
| Quantity (standard glasses/week) | 9.40 (6.69) | 9.24 (6.57) | 9.24 (6.44) | 9.71 (7.05) | 0.309 |
| Frequency (drinking occasions/week) | 2.39 (1.23) | 2.31 (1.21) | 2.37 (1.25) | 2.48 (1.24) | 0.026 b |
| Binge occasions (no. per week) |
1.04 (0.91) | 1.03 (0.90) | 1.04 (0.91) | 1.04 (0.94) | 0.985 |
| Average estimated blood alcohol concentration (eBAC) c per week | 0.018 (0.023) | 0.019 (0.017) | 0.018 (0.020) | 0.017 (0.030) | 0.487 |
| Peak eBAC d within past month | 1.35 (0.89) | 1.40 (0.93) | 1.33 (0.87) | 1.32 (0.86) | 0.197 |
| Percent (%) over weekly recommended level | 31.0 | 30.3 | 30.5 | 32.1 | 0.709 |
| Motivation to change drinking behavior (scale 0–10) | 4.07 (2.61) | 4.06 (2.63) | 4.17 (2.67) | 3.97 (2.54) | 0.358 |
a: p-values are based on ANOVA for age, AUDIT, quantity, frequency, binge occasions, average eBAC and peak eBAC; Pearson’s chi-square was used for gender and percent over weekly recommended level. b: The source of the difference is between PartyPlanner and the control group. c: Estimated average percentage blood alcohol count (BAC) per week. d: Estimated average peak percentage BAC within the past month.