Statistical Analysis
weight gain
Analyses were performed in SAS statistical software version 9.4 (SAS Institute). Descriptive statistics were generated, and differences between groups are presented as the difference between group means or relative risk ratios (RRs) with 95% CIs. Per the study protocol,Statistical power for the study was originally calculated for the primary outcome of between-group differences in conditional weight gain scores from 3 to 16 weeks, which is reported elsewhere.