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. 2013 Jun 6;15(6):e110. doi: 10.2196/jmir.2489

Table 2.

Participants’ characteristics at baseline and usage of the Change Your Drinking program (N=595).

Variable Version 1
(n=300)
Version 2
(n=295)
Gender, n (%)


Male 177 (59.0) 187 (63.4)

Female 123 (41.0) 108 (36.6)
Age, mean (SD) 29.8 (10.3) 29.0 (9.4)
Currently no professional help, n (%) 266 (88.7) 268 (90.8)
Educational level, n (%)


Basic school (Hauptschule) 25 (8.3) 23 (7.8)

Middle school (Realschule) 57 (19.0) 64 (21.7)

High school (Gymnasium) 203 (67.7) 184 (62.4)

Other school 15 (5.0) 24 (8.1)
Alcohol use


Alcohol use daysa, mean (SD) 4.1 (1.8) 4.3 (1.9)

Alcohol intakea (g), mean (SD) 313.4 (193.0) 318.5 (194.4)

Binge drinkinga, n (%) 278 (92.7) 271 (91.9)

Alcohol-related problems, mean (SD) 2.4 (1.8) 2.3 (1.9)
Usage of the program diary, n (%)


Diary used at least once 167 (55.7) 238 (80.7)

Diary used on all 10/14 days 127 (42.3) 163 (55.3)

aDuring the past 7 days.