Fig. 1

Mean glycated hemoglobin over study duration by treatment group overall and in each of the three largest race groups (White, Black, Hispanic), in each Hp phenotype group separately. Mean glycated hemoglobin (%) levels by treatment group over study duration among (A) all participants, (B) White participants, (C) Black participants, and (D) Hispanic participants. Mean glycated hemoglobin at each time-point was compared between treatment groups using t-tests, asterisks indicate P < 0.05 for the between-group comparison