Table 2.
Differences in primary and control variables by STI acquisition status across 36 months of follow-up assessment (N = 627).
| Study variables | Acquired STI over follow-up (n = 236 ) | Did not acquire STI over follow-up (n = 391 ) | Test statistic | p |
|---|---|---|---|---|
|
Primary predictor
| ||||
| SES-related riskb | 1.86 (1.70) | 1.29 (1.42) | −4.30 | .0001 |
| Baseline controls | ||||
| Ageb | 17.31 (1.68) | 17.80 (1.67) | 3.55 | .0001 |
| Intervention groupa | 116 (49.2%) | 193 (49.4%) | 0.003 | .960 |
| Smokes cigarettesa | 42 (17.8%) | 55 (14.1%) | 1.57 | .211 |
| History of alcohol usea | 183 (77.5%) | 302 (77.2%) | 0.01 | .930 |
| History of marijuana usea | 174 (73.7%) | 279 (71.4%) | 0.41 | .520 |
| Mental and physical healthb | 3.28 (5.96) | 2.56 (5.57) | −1.53 | .126 |
| Interpersonal stressb | 27.91 (13.77) | 28.44 (12.70) | 0.49 | .626 |
| Coping (negative coping)b | 19.83 (4.37) | 18.87 (4.49) | −2.63 | .009 |
| History of douchinga | 95 (40.3) | 167 (42.7) | 0.37 | .546 |
| Boyfriend statusa | 191 (80.9) | 305 (78.0) | 0.76 | .382 |
| Consistent condom use (6 mo.)a | 25 (10.6%) | 48 (12.3%) | 0.41 | .524 |
| Proportion condom use (6 mo.)b | 0.50 (0.35) | 0.50 (0.35) | −.01 | .994 |
| Lifetime number of sexual partnersb | 9.21 (17.38) | 7.69 (8.91) | −1.25 | .214 |
| STI at baselinea | 57 (45.6%) | 179 (35.7%) | 4.22 | .040 |
Note:
a
Chi-square is test statistic and frequency (percent) are reported,
b
t-test is the test statistic and mean (standard deviation) are reported