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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.