Data on offspring of women with diet-treated gestational diabetes compared with offspring from the background population.

Data are mean (SD) or proportions (n) if not otherwise stated. For some of the variables, numbers are changing due to missing data. Bold P*Analyses of differences between means, medians and proportions were by Student’s t-test, Mann-Whitney, Chi2 or Fishers exact test, respectively.†Data are given as median (25–75% percentiles), as data were not normally distributed.‡Defined as presence of either: placental abruption, shoulder dystocia, 5-min Apgar60 minutes.•Defined as the re-standardized mean test score of the four cognitive subtests.