Table 2.
Baseline to 3-Month and 6-Month Follow-up Intervention Changes Between Study Conditions
| Intervention (N 529)
|
Control (N 521)
|
Effect sizes
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pre: % or mean (SD) | 3-Mo.: % or mean (SD) | 6-Mo.: % or mean (SD) | Pre:% or mean (SD) | 3-Mo.: % or mean (SD) | 6-Mo.: % or mean (SD) | 3-Month follow-up
|
6-Month follow-up
|
|||||
| Intervention | Control | Difference | Intervention | Control | Difference | |||||||
| Primary outcome variables | ||||||||||||
| Sexually active | 69.0% | 86.2% | 86.2% | 76.2% | 75.0% | 85.7% | ||||||
| No. of partnersa | 3.4 (3.9) | 2.3 (2.3) | 3.1 (4.8) | 2.7 (4.9) | 2.6 (2.2) | 3.2 (3.8) | 0.35 | 0.03 | 0.33 | 0.07 | −0.11 | 0.18 |
| UAIa | 3.6 (5.4) | 3.3 (5.7) | 2.8 (4.6) | 1.0 (1.6) | 2.1 (3.7) | 1.7 (3.4) | 0.05 | −0.42 | 0.47 | 0.16 | −0.28 | 0.44 |
| Secondary outcome variables | ||||||||||||
| STI symptoms | 27.6% | 31.0% | 24.1% | 14.3% | 25.0% | 28.6% | ||||||
| Substance useb | 62.1% | 62.1% | 51.7% | 57.1% | 45.0% | 57.1% | ||||||
| Alcohol use (no. days) | 20.5 (23.5) | 14.9 (13.9) | 16.9 (18.5) | 19.0 (17.9) | 23.1 (8.4) | 18.2 (19.8) | 0.30 | −0.31 | 0.61 | 0.17 | 0.04 | 0.13 |
| IES-R Intrusive | 16.5 (8.1) | 10.0 (6.4) | 9.2 (6.3) | 13.7 (6.9) | 10.2 (7.0) | 9.2 (6.2) | 0.90 | 0.51 | 0.39 | 1.02 | 0.69 | 0.33 |
| IES-R Avoidance | 15.1 (7.3) | 10.4 (6.8) | 9.6 (6.6) | 14.1 (7.4) | 10.3 (6.3) | 10.4 (6.6) | 0.67 | 0.56 | 0.11 | 0.79 | 0.53 | 0.26 |
| IES-R Hyperarousal | 10.0 (6.1) | 5.2 (5.0) | 5.2 (4.6) | 8.0 (6.0) | 5.5 (4.8) | 4.8 (4.3) | 0.90 | 0.62 | 0.40 | 0.90 | 0.62 | 0.28 |
| Services usedc | 0.9 (1.1) | 1.9 (0.9) | 1.4 (1.0) | 1.2 (0.9) | 1.4 (0.9) | 1.2 (0.8) | 1.00 | 0.22 | 0.78 | 0.48 | 0.00 | 0.48 |
Note: SD = standard deviation; UAI = unprotected anal intercourse; STI = sexually transmitted infection; IES-R = Impact of Events Scale-Revised.
a
Three outliers in each condition (total 6) were excluded from the sexual behavior calculation.
b
Any use and includes cocaine, marijuana, meth, club drugs.
c
Mean score of participants using any of the following services: posttest counseling, mental health counseling, psychiatric services, sexual health clinic, and primary care.