All analyses were performed using IBM SPSS, version 17.0. Pearson’s chi-square
tests and Student’s t tests assessed baseline group equivalence. Analysis of covariance
(ANCOVA) models tested the intervention’s effect on postintervention food label reading,
diet adherence, physical activity, and glycemic control, controlling for baseline values.
First, univariate models examined the homogeneity of regression assumption on each
dependent variable. When violated, the interactive model was retained. When satisfied,
a full-factor ANCOVA model evaluated the group differences on the follow-up score
adjusted for the baseline score.