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Table 2 Participants in the intervention and control schools at baseline and at follow up

From: Effects on alcohol use of a Swedish school-based prevention program for early adolescents: a longitudinal study

 

Autumn 2011 school year 6 (baseline)

Autumn 2012 school year 7

Autumn 2013 school year 8

Autumn 2014 school year 9

Intervention schools

Girls: n = 141

Girls: n = 119

Girls: n = 128

Girls: n = 120

Boys: n = 143

Boys: n = 112

Boys: n = 111

Boys: n = 111

Total: 284/334

Total: 231/334

Total: 239/334

Total: 231/334

(85.0%)

(69.2%)

(71.6%)

(69.2%)

Control schools

Girls: n = 72

Girls: n = 68

Girls: n = 68

Girls: n = 63

Boys: n = 73

Boys: n = 68

Boys: n = 66

Boys: n = 58

Total: 145/160

Total: 136/160

Total: 134/160

Total: 121/160

(90.6%)

(85%)

(83.8%)

(75.6%)