Table 1. Attrition Analyses: Bivariate Comparisons of Participants' Baseline Characteristics by Inclusion in the Current Study.
| Participant characteristics (N = 2,245) | Included a (n = 1,145) | Excluded a (n = 1,100) | p-Value |
|---|---|---|---|
| Demographics | |||
| Female | 776 (67.8%) | 569 (51.6%) | <0.001 |
| Age | 18.4 (0.3) | 18.4 (0.4) | 0.068 |
| Caucasian | 712 (62.2%) | 622 (56.4%) | 0.006 |
| Alcohol use | |||
| Number of binge drinking episodes in the past 3 months | 2.1 (5.8) | 2.2 (5.0) | 0.819 |
| Alcohol-induced blackouts b | 89 (7.8%) | 95 (8.7%) | 0.471 |
a
The 2,245 who completed the baseline survey comprised the full longitudinal sample. Bivariate comparisons were made between those from that sample who were included versus excluded from the current study.
b
Based on the Rutgers Alcohol Problem Index blackout item.
n (%) or mean (SD). Comparisons all made at the baseline survey.