TABLE 3—
Safer Sex Intervention Effects on Primary and Secondary Outcomes at 4-Month Follow-Up Among Tenth-Grade Girls: Southeastern United States, 2015
| Effects at 4-Month Follow-Upa |
|||||
| Outcomes | Intervention, Mean ±SD | Control, Mean ±SD | Difference | P | Effect Sizeb |
| Primary outcomes | |||||
| Communication intentions (0–100) | 78.6 ±28.0 | 76.2 ±28.6 | 2.4 | .35 | 0.11 |
| Communication self-efficacy (1–4) | 3.6 ±0.5 | 3.6 ±0.5 | 0.0 | .28 | 0.12 |
| Secondary outcomes | |||||
| Sexual assertiveness self-report (1–5) | 3.4 ±0.9 | 3.3 ±0.9 | 0.1 | .08 | 0.19 |
| HIV and STD knowledge (1–12) | 8.2 ±2.0 | 7.4 ±2.0 | 0.8 | < .001 | 0.56 |
| Condom attitudes (1–5) | 4.1 ±0.8 | 3.7 ±0.8 | 0.4 | < .001 | 0.45 |
| Condom norms (1–5) | 3.3 ±1.0 | 3.4 ±1.0 | −0.1 | .53 | 0.07 |
| Condom self-efficacy (1–4) | 2.7 ±0.9 | 2.5 ±0.8 | 0.2 | .007 | 0.30 |
| Condom intentions (0–100) | 87.3 ±28.2 | 88.0 ±26.7 | −0.7 | .87 | 0.02 |
Note. STD = sexually transmitted disease.
a
Generalized estimating equation results, with control for clustering by school and pretest score on each variable.
b
Cohen’s d standardized difference in covariance adjusted means between treatment group and control group.