Table 1.
Baseline characteristics of study participants.
| Control (N=364) | SBIRT (N=354) | All (N=718) | |
|---|---|---|---|
| Categorical Variables | n (%) | n (%) | n (%) |
| Site | |||
| Ventura County | 157 (43.1%) | 156 (44.1%) | 313 (43.6%) |
| UCLA | 207 (56.9%) | 198 (55.9%) | 405 (56.1%) |
| Gender | |||
| Male | 187 (51.4%) | 178 (50.3%) | 365 (50.8%) |
| Female | 177 (48.6%) | 176 (49.7%) | 353 (49.2%) |
| Ethnicity/Race | |||
| Latino (White, non-White) | 106 (29.1%) | 94 (26.6%) | 200 (27.9%) |
| non-Latino White | 192 (52.8%) | 189 (53.4%) | 381 (53.1%) |
| non-Latino non-White | 66 (18.1%) | 71 (20.1%) | 137 (19.1%) |
| Employment (Last 30 days)a | |||
| Employed | 98 (26.9%) | 103 (29.1%) | 201 (28%) |
| Unemployed | 266 (73.1%) | 251 (70.9%) | 517 (72%) |
| AUDIT Score | |||
| 0–7 (Low risk) | 162 (44.5%) | 143 (40.4%) | 305 (42.5%) |
| 8–15 (Moderate risk) | 104 (28.6%) | 103 (29.1%) | 207 (28.8%) |
| 16+ (High risk) | 98 (26.9%) | 108 (30.5%) | 206 (28.7%) |
| DAST-10 Score | |||
| 0–2 (Low risk) | 138 (37.9%) | 136 (38.4%) | 274 (38.2%) |
| 3–5 (Moderate risk) | 105 (28.8%) | 100 (28.2%) | 205 (28.6%) |
| 6+ (High risk) | 121 (33.2%) | 118 (33.3%) | 239 (33.3%) |
| Continuous Variables | Mean (SD) | Mean (SD) | Mean (SD) |
| Age | 34.78 (12.85) | 32.74 (12.28) | 33.78 (12.6) |
| Education (years) | 13.63 (2.68) | 13.71 (2.49) | 13.67 (2.59) |
| Kessler-6 Score | 12.35 (5.8) | 12.38 (5.94) | 12.36 (5.86) |
| Tobacco use (days in past 90) | 32.32 (39.44) | 31.25 (40.26) | 31.79 (39.82) |
| Alcohol use (days in past 90) | 18.84 (23.33) | 21.46 (25.7) | 20.14 (24.55) |
| Primary outcome variables | |||
| Heavy drinking (days in past 90) | 8.91 (16.08) | 12.18 (21.62) | 10.52 (19.07) |
| Cannabis use (days in past 90) | 25.77 (34.46) | 28.82 (35.72) | 27.27 (35.09) |
| Stimulant use (days in past 90) | 7.29 (17.57) | 6.84 (16.61) | 7.07 (17.09) |
| Secondary outcome variables | n (%) | n (%) | n (%) |
| Alcohol abstinence (past 90 days) | 69 (19.0%) | 45 (12.7%) | 114 (15.9%) |
| Cannabis abstinence (past 90 days) | 137 (37.6%) | 124 (35.0%) | 261 (36.4%) |
| Stimulant abstinence (past 90 days) | 238 (65.4%) | 234 (66.1%) | 472 (65.7%) |
a
‘Employed’ category includes full-time, part-time or military service; ‘Unemployed’ category includes student, retired or homemaker.