INS and diabetes mellitus: After adjusting for maternal age, multiparity, family history of diabetes mellitus, the fasting and 1-hour OGTT results, insulin use, IPI, BMI gain between the pregnancies, and the number of charts for each woman, the mean postprandial glucose levels remained significant (p = 0.017), with PR = 1.04 [95% CI: 1.01, 1.07; for every 20 mg/dl increase].