Table 3.

Storytelling 4 Empowerment intervention effects on self-efficacy and prevention knowledge (n=25).

Outcomes		S4Ea baseline, mean (SD)	S4E follow-up, mean, (SD)	∆ score mean	Paired t test (df)	Cohen d	Cohen d 95% CI
Substance use self-efficacy
	Alcohol refusal	3.57 (0.59)	3.78 (0.52)	0.21	1.55 (22)	0.38	−0.94 to 0.19
	Drug refusal	3.50 (0.86)	3.59 (0.67)	0.09	0.62 (21)	0.12	−0.68 to 0.44
Sexual risk self-efficacy
	Condomless sex	3.25 (0.85)	3.33 (0.76)	0.08	0.53 (23)	0.10	−0.66 to 0.46
Substance use prevention knowledge
	Use of tobacco products	3.09 (0.79)	3.43 (0.59)	0.34	2.58 (22)	0.49	−0.10 to 1.07
	Use of alcohol or drugs	3.30 (0.56)	3.61 (0.58)	0.31	1.91 (22)	0.50	−0.07 to 1.07
Sexual risk prevention knowledge
	Pregnancy prevention	3.50 (0.72)	3.58 (0.50)	0.08	0.62 (23)	0.10	−0.43 to 0.69
	STIb/HIV prevention	2.67 (1.24)	2.92 (1.10)	0.25	1.00 (23)	0.21	−0.35 to 0.77

^aS4E: Storytelling 4 Empowerment.

^bSTI: sexually transmitted infection.