Primary outcomes
The differences between the GDM outcomes and OGTT plasma glucose concentration values in both study arms are shown in Table 2. There were no significant differences in the proportion of pregnant women diagnosed with GDM in the unblinded group compared to the blinded groups [21.5% vs 14.9%, p =0.37]. There were also no significant differences in the FG,1hPG and 2hPG of participants in the unblinded group, compared to the blinded group group [FG: median 4.2 IQR 4.0-4.5) vs 4.3 (4.1-4.6) mmol/L, p =0.48); 1hPG: 7.7 (6.3-9.2) vs 7.5(6.3-8.7) mmol/L,p =0.38), and 2hPG: 6.3 (5.8-7.7) vs 6.2 (5.3-7.2) mmol/L,p =0.15)]. Adjustments were made for co-variates such as maternal age, ethnicity, education, family history of diabetes and pre-pregnancy BMI.