2.9. Statistical Analyses
Data are shown as mean (95% CI) unless otherwise noted. We conducted an intention-to-treat analysis, which included data from all 90 participants who were randomly assigned. Results are reported for the intention-to-treat analysis unless indicated otherwise. A linear mixed model was used to assess time, group, and time × group effects for each outcome. In each model, time and group effects (and their interaction) were estimated without imposing a linear time trend. For each outcome variable, linear modeling assumptions were assessed with residual diagnostics. To account for the potential for nonuniform variances (heteroskedasticity) between treatment groups due to random chance, all CIs and 