Table 3

Weekly alcohol consumption [standard deviations (SD)] at one and six months follow-up by condition (WDYD intervention versus control): intention-to-treat analyses (multiple imputation) (N = 609) and completers-only analyses (n = 280) adjusted for clustering and covariates (i.e., gender and education level)
Intervention Control
M SD M SD dif Beta SE P Cohen’s d
1-month follow-up
Intention-to-treat 13.2 16.1 12.3 15.0 0.9 −0.01 0.05 0.86 0.06
Completers-only 13.0 16.2 10.8 12.2 2.2 −0.01 0.06 0.93 −0.02
6-month follow-up
Intention-to-treat 12.2 15.1 11.7 14.0 0.5 −0.01 0.05 0.89 0.00
Completers-only 11.5 14.4 10.8 12.3 0.7 −0.01 0.06 0.83 0.08

Note.N number of participants, M mean, SD standard deviation, Dif difference in means between conditions, SE standard error. P p-value.

Voogt et al.

Voogt et al. BMC Public Health 2013 13:694   doi:10.1186/1471-2458-13-694

Open Data