Patient gestational age weeks (mean±SE, N) at delivery varied (P<0.0001 using ANOVA)
| Diabetes group | No PreE | Developed PreE |
| No gestational diabetes | 38.7±0.1, 351A | 36.7±0.2, 118B |
| Diabetes mellitus prior to pregnancy | 37.5±0.6, 21A | 35.0±0.4, 37C |
| Developed gestational diabetes mellitus | 38.1±0.3, 72A | 36.7±0.5, 23B |
Groups with difference letter superscripts (A and B) differed (P<0.05 using Duncan’s post hoc test).
ANOVA, analysis of variance; PreE, preeclampsia.