TABLE 3—
Benchmark |
Sensitivity 1b |
Sensitivity 2c |
|||||
Outcome variables | No. | AORa (95% CI) | ICC | No. | AORa (95% CI) | No. | AORa (95% CI) |
Initiation of vaginal sex | |||||||
By end of eighth grade | 2501 | 1.18 (0.91, 1.53) | 0.002 | 2501 | 1.11 (0.74, 1.64) | 2256 | 1.17 (0.90, 1.52) |
By end of ninth grade | 2268 | 1.27 (1.01, 1.59) | 0.000 | 2268 | 1.23 (0.92, 1.64) | 2049 | 1.26 (1.00, 1.58) |
Had vaginal sex in past 3 mo | |||||||
Yes | 2392 | 1.24 (0.94, 1.64) | 0.006 | 2392 | 1.16 (0.84, 1.61) | 2156 | 1.25 (0.95, 1.66) |
Without effective birth control | 2392 | 1.11 (0.77, 1.58) | 0.001 | 2392 | 1.03 (0.69, 1.52) | 2156 | 1.13 (0.79, 1.61) |
Without condom | 2387 | 1.30 (0.93, 1.81) | 0.000 | 2387 | 1.23 (0.89, 1.72) | 2151 | 1.33 (0.95, 1.86) |
Note. AOR = adjusted odds ratio; CI = confidence interval; ICC = intraclass correlation. Estimates were obtained from logistic multilevel models that specified school as a random effect. All models were adjusted for the following school-level design factors: school configuration, enrollment size, and proportion of students who reported having had sex at baseline. All models were also adjusted for the following potential student-level confounders: age, gender, race/ethnicity, number of months between baseline and ninth grade follow-up survey, late enrollment into the study (i.e., January to February 2012), and academic grades. Models addressing recent sexual behaviors also included the student’s baseline measure of the outcome.
An AOR > 1 indicates that more students in the intervention condition reported doing the behavior relative to those in the comparison condition.
Sensitivity analyses excluding the school-level covariate “ever had sex.”
Sensitivity analyses excluding the students who completed a baseline survey in February 2012.