Study design
GDM
GDM
Mother-child pairs were recruited from the RCT Training in pregnancy which was designed to investigate the effects of offering a regular exercise program during pregnancy on GDM prevalence (The participating women were randomised to receive a 12-week exercise program or standard antenatal care. At the end of intervention (week 32–36 of pregnancy), participants were examined and underwent a 75-gram OGTT, where fasting and 2-hour glucose were analysed. Demographic and lifestyle characteristics were collected via questionnaires at two time points in pregnancy and 3 months post-partum. Pregnancy outcomes and newborn data were retrieved from medical charts after delivery.At follow-up, questionnaire data were collected between October 2014 and December 2016 when the child was ~7 years old, by using the safe electronic solution CheckWare. Children and parents residing in Trondheim who had consented at the follow-up questionnaire to be invited to an in-person study visit, were invited to this study visit between November 2016 and December 2018, when the child was ~9 years old. The aim was assess the long-term effects on children’s health. For the women participating in this follow-up, we repeated the primary analyses from the original RCT of potential differences in GDM prevalence between the intervention and control group, using the revised WHO 2013 criteria (Parents received written detailed information about the study. The children received a separate easy to read information letter, and parents and children were encouraged to discuss participation. The parents gave written consent on behalf of their children. The study was approved by The Regional Committee for Medical and Health Research Ethics in Central Norway (REK no. 2015/2028, application date 09-03-2016).