Postpartum SMS reminders to women who have experienced gestational diabetes to test for Type2 diabetes: the DIAMIND randomized trial.

Abstract

This parallel group randomized controlled trial assessed whether an SMS reminder system for women, after gestational diabetes, would increase their attendance for an oral glucose tolerance test (OGTT) by sixmonths postpartum. Women were eligible for inclusion if they were diagnosed with gestational diabetes in their recent pregnancy, had a mobile phone and normal blood glucose profile prior to postnatal discharge from the Women's and Children's Hospital, Adelaide. A computer-generated random number sequence and telephone randomization were used. Two hundred and seventy-six women were randomized. Women in the six-week group (n=140) were sent a text reminder to attend for an OGTT at six weeks postpartum, with further reminders at three and sixmonths if required. Women in the control group (n=136) received one text reminder at sixmonths postpartum. Blinding was not feasible. The primary outcome was OGTT attendance within sixmonths postpartum. Women in the six-week group did not increase their attendance for an OGTT within sixmonths postpartum compared with women in the control group, 104 (77.6% of 134) versus 103 (76.8% of 134), relative risk (RR) 1.01, 95% confidence interval (CI) 0.89-1.15. The SMS reminder system did not increase postpartum OGTT, fasting plasma glucose or HbA1c completion, although high rates of test completion were measured in both groups. Further research is required into factors influencing attendance for postpartum testing from the perspective of women, and into optimal counselling relating to Type2 diabetes risk in the postpartum period for increasing postpartum glucose testing rates.