Abstract
The present study examines the impact of the HealthWise South Africa prevention intervention on condom use self-efficacy. Students from the Cape Town area were assessed at the beginning and end of each school year, beginning in the 8th grade and ending in the 11th. The intervention was delivered in 12 lessons during the 8th grade and 6 lessons during the 9th grade. Using three-level multiphase mixed-effects models, we found that HealthWise had a statistically significant positive effect on condom use self-efficacy, although effects differed for boys and girls. HealthWise had an effect during the first phase of the intervention (8th grade) for girls and during the second phase (9th grade) for boys. We speculate that the gender differences occur because the 8th grade lessons of the intervention taught skills such as discussion, decision making, and negotiation, which may be more salient to girls, and a 9th grade lesson explicitly focused on condom use within the context of sexual relationships, which may have been more salient to boys.
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Notes
We have not presented effect sizes for the mixed-effects model because to our knowledge there are not standard effect sizes for models of this complexity (i.e., three levels of nesting, multiphase, mixed effects).
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Preparation of this manuscript was supported by National Institute on Drug Abuse (NIDA) Center grant P50 DA10075, NIDA Training grant T32 DA017629-01A1, and NIDA grant R01 DA01749. The content is solely the responsibility of the authors and does not necessarily represent the official views of NIDA or the National Institutes of Health (NIH).
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Coffman, D.L., Smith, E.A., Flisher, A.J. et al. Effects of HealthWise South Africa on Condom Use Self-efficacy. Prev Sci 12, 162–172 (2011). https://doi.org/10.1007/s11121-010-0196-z
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DOI: https://doi.org/10.1007/s11121-010-0196-z