Study Details

Citation

Kirby, D., Korpi, M., Adivi, C., Weissman, J. (1997). An impact evaluation of project SNAPP: An AIDS and pregnancy prevention middle school program. AIDS Education and Prevention, 9(1), 44-61.

Program or Component Study?
Program
Program or Component Name

Project SNAPP

Show Evidence of Effectiveness
No
Study Rating and Explanation
High

Random assignment study that met all criteria for a high rating; findings show no positive, statistically significant impact on a relevant behavioral outcome measure for either the full sample or key subgroup

Program Information

Program Type
Sexual health education
Program Length
Fewer than 10 sessions

Evaluation Setting

Evaluation Setting
In school: Middle school

Study Sample

Average Age Group
13 or younger
Majority Racial/Ethnic Group
Hispanic or Latino
Sex
Male and female youth

Research Design

Assignment Method
Cluster randomized controlled trial
Sample Size

1657

Number of Follow-Ups

2

Length of Last Follow-Up

17

Year of Last Data Collection
1996 (Imputed to year of publication minus one year)
Reviewed Studies
High-Quality Randomized Trial
Protocol Version
Version 1.0
Effect Sizes
{"0": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Ever been pregnant or gotten someone pregnant","OutcomeDomain":"Pregnancy","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"5","FUReference":"After end of intervention","MeanTreat":"0.02","MeanComp":"0.01","TpperES":"0.265","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"1": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Ever been pregnant or gotten someone pregnant","OutcomeDomain":"Pregnancy","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"17","FUReference":"After end of intervention","MeanTreat":"0.01","MeanComp":"0.02","TpperES":"-0.137","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"2": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Ever had an STI","OutcomeDomain":"STIs or HIV","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"5","FUReference":"After end of intervention","MeanTreat":"0.01","MeanComp":"0.01","TpperES":"0.161","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"3": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Ever had an STI","OutcomeDomain":"STIs or HIV","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"17","FUReference":"After end of intervention","MeanTreat":"0.01","MeanComp":"0.01","TpperES":"-0.154","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"4": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Initiated intercourse","OutcomeDomain":"Sexual Activity","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"5","FUReference":"After end of intervention","MeanTreat":"0.07","MeanComp":"0.06","TpperES":"0.117","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"5": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Initiated intercourse","OutcomeDomain":"Sexual Activity","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"5","FUReference":"After end of intervention","MeanTreat":"0.12","MeanComp":"0.11","TpperES":"0.114","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"6": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Initiated intercourse","OutcomeDomain":"Sexual Activity","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"5","FUReference":"After end of intervention","MeanTreat":"0.10","MeanComp":"0.08","TpperES":"0.121","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"7": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Initiated intercourse","OutcomeDomain":"Sexual Activity","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"17","FUReference":"After end of intervention","MeanTreat":"0.20","MeanComp":"0.20","TpperES":"0.004","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"8": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Initiated intercourse","OutcomeDomain":"Sexual Activity","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"17","FUReference":"After end of intervention","MeanTreat":"0.12","MeanComp":"0.12","TpperES":"0.011","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"},"9": {"ProgramName":"Project SNAPP","StudyID":"PPRER000034","ManuscriptID":"PPRER000034","Rating":"High","OutcomeName":"Initiated intercourse","OutcomeDomain":"Sexual Activity","OutcomeDichotomous":"Yes","SampleType":"Subgroup--other","FUTimingMonths":"17","FUReference":"After end of intervention","MeanTreat":"0.16","MeanComp":"0.15","TpperES":"0.009","StatSigRepEffect":"No","RepEffectFavorable":"Not significant","RepEffectMeet":"No"}}

NA = Not available. This means the authors did not report the information in the manuscripts associated with the studies we reviewed.

a This information was not available whenever authors did not report information for the treatment and comparison groups separately on outcome means, standard deviations, and/or sample sizes.

b Authors reported that the program effect (impact) estimate is statistically significant with a p-value of less than 0.05 based on a two-tailed test.

c For some outcomes, having less of that outcome is favorable. In those cases, an effect with a negative sign is favorable to the treatment group (that is, the treatment group had a more favorable outcome than the comparison group, on average).

d An effect shows credibly estimated, statistically significant evidence whenever it has a p-value of less than 0.05 based on a two-tailed test, includes the appropriate adjustment for clustering (if applicable), and it is not based on an endogenous subgroup.

Language directly from the program model developer or authors.