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Table 2 Study characteristics for studies reporting continuous measures on alcohol use

From: Effectiveness of school-based preventive interventions on adolescent alcohol use: a meta-analysis of randomized controlled trials

Study N Gender boys Age School level Program Program intensity Outcome Time points in months Hedges’g T1 Hedges’g T2 Hedges’g T3
Caplan et al. 1992 [66] 282 55% 12.00 JHS PDYP High c 3 0.33*   
Clark et al. 2010 [62] 2467 49% 16.72 HS Project SUCCESS Medium b 1, 12 0.01 0.04  
D’Amico et al. 2002 [45] 300 42% 16.00 HS DARE & RSTP Low a 2, 6 0.06 0.27***  
Newton et al. 2009 [57] 764 60% 13.08 JHS CLIMATE2 High a 1, 6 0.12 0.36***  
Peleg et al. 2001 [64] 1000 44% 15.50 JHS LST Medium c 12, 24 1.17*** 0.95***  
Reddy et al. 2002 [53] 4776 51% 11.90 JHS HRIDAY High c 12 0.18***   
Shope et al. 1992 [63] 2589 - 10.50 ES AMPS Medium c 6, 18, 30 0.06 0.12 0.11
Vogl et al. 2009 [61] 1466 59% 13.00 JHS CLIMATE1 Medium a 1, 6, 12 0.01** 0.02 0.04
Warren et al. 2006 [48] 4734 53% 12.50 JHS keepin’it R.E.A.L Medium b 18 0.07*   
Werch et al. 2005 [58] 604 44% 15.24 HS Project SPORT Low c 3, 12 0.22** 0.10  
Werch et al. 1996 [51] 104 44% 13.80 JHS STARS Medium b 1, 2 0.21 0.46*  
Wilhelmsen et al. 1994 [65] 915 - 13.50 JHS Young and alcohol Medium c 3 0.04   
  1. Note. a = Report changes in weekly alcohol use, b = Report changes in monthly alcohol use, c = Report changes in lifetime alcohol use. JHS = Junior High School; HS = High School; ES = Elementary School. AMPS = Alcohol Misuse Prevention Study; CLIMATE = 1Alcohol Course, 2Alcohol and Cannabis course; DARE = Drug Abuse Resistance Education; HRIDAY = Health Related Information and Dissemination Among Youth (Hindu word for “Heart”); R.E.A.L = Refuse, Explain, Avoid, Leave; LST = Life Skills Training; PDYP = Positive Youth Development Program; RSTP = Risk Skills Training Program; SUCCESS = Schools Using Coordinated Community Efforts to Strengthen Students; STARS = Start Taking Alcohol Risks Seriously. *p < .05. **p < .01 ***p < .001.