Promoting fruit and vegetable intake in childbearing age women at risk for gestational diabetes mellitus : a randomised controlled trial

This randomised controlled trial verified the efficacy of an implementation intentions intervention (n=24) to promote fruit and vegetable consumption among childbearing age women at risk for gestational diabetes mellitus against a control condition based on the question-behaviour effect (n=26). There was only a significant time effect (F(2,85)=5.69, p=0.0048). Both groups increased their vegetable consumption compared to baseline at 3 months (p=0.0022) and 6 months (p=0.0042). There were no significant effects on weight, waist circumference and blood glucose levels. Implementation intentions and the question-behaviour effect appear to be effective behaviour change techniques to promote vegetable intake among this high-risk population