Table 1.
Baseline comparison of completers (n = 218) and attriters (n = 74).
| Completers | Attriters | t (chi-square test) | P | |
|---|---|---|---|---|
| % female | 59 | 63 | (0.38) | .54 |
| Mean Age (SD) | 25.80 (9.49) | 24.75 (7.62) | 0.95 | .34 |
| % smokers | 11 | 16 | (1.13) | .29 |
| Mean cigarettes/day (SD) | 9.84 (12.04) | 5.08 (3.18) | 1.34 | .19 |
| % use illicit drugs | 17 | 31 | (6.74) | .01 |
| Mean drug use freq/month (SD) | 8.00 (11.89) | 4.96 (5.55) | 1.15 | .26 |
| % drink alcohol | 74 | 71 | (0.10) | .76 |
| Mean drinks/week (SD) | 5.57 (6.25) | 6.25 (5.93) | 0.71 | .48 |
Note. Average use figures were calculated only for participants who reported any use of the given substance.