Fig. 2: Moderation analysis for motivation to drink less.
From: Do engagement and behavioural mechanisms underpin the effectiveness of the Drink Less app?
Motivation to drink less as a moderator of intervention effectiveness was assessed by including an interaction term between the moderator of interest (motivation to drink less at baseline, log transformed due to negative skewed data) and group allocation on the primary outcome in the primary analysis model from the main trial paper (a one-way ANCOVA examining the effect of group allocation on the primary outcome, weekly alcohol consumption at 6-month follow-up, adjusting for baseline consumption using multiple imputation for missing outcome data at 6-months).
