The impact of gestational diabetes mellitus on pregnancy outcome comparing different cut-off criteria for abnormal glucose tolerance.

Abstract Objective. To examine pregnancy outcomes in relation to different categories of glucose tolerance during pregnancy. Design. Prospective observational cohort study. Setting. Patient recruitment and data collection were performed in four delivery departments in southern Sweden. Population. Women delivering during 2003–2005; 306 with gestational diabetes mellitus, 744 with gestational impaired glucose tolerance and 329 randomly selected controls. Methods. All women were offered a 75 g oral glucose tolerance test during pregnancy. On the basis of their capillary 2-hour plasma glucose concentrations, three groups were identified: gestational diabetes mellitus (>10.0 mmol/l), gestational impaired glucose tolerance (8.6–9.9 mmol/l) and controls (<8.6 mmol/l). Data for the groups were compared using a population-based database. Main outcome measures. Maternal and fetal outcomes. Results. For the gestational diabetes mellitus group, adjusted odds ratios (95% confidence intervals) for hypertensive disorder...