Baseline characteristics
The participants in both the unblinded and blinded study arm groups had comparable baseline characteristics as presented in Table 1. Of the total participants, approximately 60% were Chinese, 90% had at least a college education and above, and 50% had a family history of diabetes. Participants had a mean age of 31 years and a pre-pregnancy BMI of 22 kg/m2. The mean gestational age at which the CGM sensors were worn by participants after randomization was 11 weeks, and the mean gestational age of OGTT assessment was 25 weeks (Table 1). There were no differences in baseline characteristics in the participants included and excluded from the analysis with the primary outcome of GDM (Table S1).