A Randomized Controlled Trial on the Effectiveness of Short Message Service (SMS) Reminders in Improving Postpartum Follow-up among Gestational Diabetes Mellitus Patients

Annie Jane Sarmiento, Diane Carla Bernardo, Iris Thiele Isip-Tan


Objective: This study assessed whether Short Message Service (SMS) reminders would improve follow-up rate among Gestational Diabetes Mellitus (GDM) patients by 12 weeks postpartum.

Methodology In this single-center single blind randomized controlled trial, we assigned 308 patients with GDM to either one of two arms, usual care alone vs. usual care with SMS reminders. In the usual care group 154 patients received a 10-minute short lecture on GDM, and a 75g oral glucose tolerance test (OGTT) request prior to discharge while 154 patients in the SMS group received twice a week SMS reminders at 4 weeks, 8 weeks, and 10 weeks after the birth of their baby in addition to usual care. Primary outcome was clinic visit within 6 to 12 weeks postpartum with a 75g OGTT result.

Results: In our population, the overall follow-up rate was 19.8% (61/308). Follow up rates were 20.1% (31/154) for the Usual Care and 19.5% (30/154) for the SMS groups. The addition of SMS reminders was not associated with an increase in follow-up rate at 12 weeks postpartum (Adjusted RR 0.98, 95% CI 0.63 to 1.52, p-value 0.932). The use of Insulin or Metformin for GDM control was associated with increase follow-up (adjusted RR 1.92, 95% CI 1.20 to 3.07, p-value 0.006.

Conclusion SMS reminders did not improve postpartum follow-up rate among GDM patients at 12 weeks postpartum. 


gestational diabetes, Short Message Service, reminder system

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