Results
REGRESSION, SECONDARY
Baseline characteristics by dietary quality and adherence to diet are provided in There were no missing data at baseline. At 12 mo, 366 participants (81.7%) included in this analysis provided all 3 24-h dietary recalls, 46 provided 2 recalls (10.3%), and 36 (8.0%) provided 1 recall. DIETFITS participants who did not provide dietary recalls at 12 mo were excluded from the analysis (Absolute 12-mo changes in BMI were greatest for HQ/HA and lowest for LQ/LA subgroups for both the HLC and HLF diets; values for HQ/LA and LQ/HA were intermediate between the 2 (The primary and secondary outcomes were analyzed via multiple linear regression using LQ/LA as the reference group (Baseline to 12-mo change in BMI by dietary quality and adherence for those assigned to a healthy low-carbohydrate diet (A) or healthy low-fat diet (B). Dietary quality is defined by 12-mo minus baseline change in HEI-2010 score (above the median is high, below the median is low); dietary adherence is defined by 12-mo minus baseline change in grams of net carbohydrates (below the median is high, above the median is low). Bars display mean (SD) 12-mo BMI change from baseline by diet quality/diet adherence groups. Numbers below the bars represent the changes in mean (95% CI) BMI compared with LQ/LA group, determined from linear regression modeling of 12-mo BMI change on diet quality and adherence groups adjusted for age, sex, baseline weight, and baseline net carbohydrate or total fat intake. Abbreviations: HQ, high quality; HA, high adherence; LQ, low quality; LA, low adherence.