Table 2.
Self-efficacy and prevention knowledge by group.
| Outcomes | S4Ea, ∆ score, mean (SD) | Control, ∆ score, mean (SD) | Independent t test (df) | Cohen’s d (S4E vs control) | Cohen d 95% CI | |
| Substance use self-efficacy | ||||||
|
|
Alcohol refusal | 0.22 (0.67) | 0.16 (0.55) | 0.32 (42.79) | 0.10 | −0.47 to 0.66 |
|
|
Drug refusal | 0.09 (0.68) | 0.08 (0.70) | 0.05 (44.51) | 0.01 | −0.56 to 0.59 |
| Sexual risk self-efficacy | ||||||
|
|
Condomless sex | 0.08 (0.78) | 0.13 (0.92) | −0.19 (44.06) | −0.06 | −0.61 to 0.50 |
| Substance use prevention knowledge | ||||||
|
|
Use of tobacco products | 0.30 (0.77) | 0.16 (0.80) | 0.64 (45.93) | 0.18 | −0.40 to 0.76 |
|
|
Use of alcohol or drugs | 0.35 (0.65) | 0.20 (1.00) | 0.61 (41.46) | 0.18 | −0.39 to 0.74 |
| Sexual risk prevention knowledge | ||||||
|
|
Pregnancy prevention | 0.08 (0.65) | 0.00 (0.41) | 0.53 (38.29) | 0.15 | −0.41 to 0.71 |
|
|
STIb/HIV prevention | 0.25 (1.22) | −0.17 (1.74) | 0.96 (41.35) | 0.28 | −0.28 to 0.84 |
aS4E: Storytelling 4 Empowerment.
bSTI: sexually transmitted infection.