Summary: In 200 women with gestational diabetes mellitus (GDM) randomised in a multicentre trial in China, adding a cognitive behavioural therapy (CBT)-based digital dietary programme delivered through a WeChat mini-programme raised the glycaemic qualification rate at later follow-ups and lowered post-lunch and post-dinner glucose versus standard care alone. Fasting and post-breakfast glucose were unchanged, and the reported reduction in macrosomia (5% vs 15%) rests on a small number of events.
PICO Summary
| Element | Detail |
|---|---|
| Population | 200 pregnant women with GDM enrolled (171 completed) across multiple centres in China; mean age 31.2 years, mean gestational age 26.3 weeks at enrolment, baseline HbA1c 5.1 to 5.2%. |
| Intervention | Standard care plus a CBT-based digital dietary intervention (structured dietary education, food selection and meal-sequencing strategies) delivered via a customised WeChat mini-programme. |
| Comparison | Standard GDM care alone, without the digital or CBT-based component. |
| Outcome | Primary outcome (glycaemic qualification rate) was higher in the intervention group at follow-up 3 (87.9% vs 81.9%; P=.02), follow-up 4 (91.0% vs 87.2%; P=.04) and follow-up 5 (94.0% vs 91.5%; P=.04). Postprandial glucose was lower after lunch (2 h: 5.1 vs 5.3 mmol/L; P=.03) and dinner, but not after breakfast; fasting glucose was unchanged. General Self-Efficacy Scale scores were higher (195.4 vs 192.9). Macrosomia was less frequent (5% vs 15%; P=.04). No CI, absolute risk reduction or NNT was reported for the macrosomia outcome. |
CBT-based digital diet in GDM
RCT · gestational diabetes · multicentre
Adding a CBT-based WeChat diet programme modestly raised the glycaemic qualification rate and lowered post-lunch and post-dinner glucose versus standard care. Benefits were small and the macrosomia signal rests on few events.
Expert Commentary
This multicentre randomised trial offers cautiously encouraging evidence that a structured, behaviourally framed digital diet programme can sharpen glycaemic control in gestational diabetes. The signal is genuine but modest: the glycaemic qualification rate separated only at later follow-ups, and the postprandial benefit was confined to lunch and dinner, with no change in fasting or post-breakfast glucose. The absolute differences in glucose were small, on the order of 0.2 mmol/L, and their clinical meaning is uncertain. The headline reduction in macrosomia, from 15% to 5%, is the most patient-relevant result, yet it is a secondary outcome resting on few events, reported without a confidence interval or number needed to treat, so it should be read as hypothesis-generating rather than established. A central caveat is sponsorship and design: several authors were affiliated with the technology company that built the WeChat programme, and a behavioural intervention of this kind cannot be blinded, both of which can inflate apparent benefit. Can I use this with my patients? Not yet as a standalone therapy, though for a motivated patient with GDM who already uses WeChat, it is a reasonable adjunct to dietitian-led care rather than a replacement for it. Future trials should be investigator-led, report neonatal outcomes with full effect estimates, and confirm whether these postprandial gains translate into fewer deliveries complicated by macrosomia.
References
Pan Y, Tang J, Lu B, Kuang M, Zhao M, Liu H, Zhong S. Effects of Cognitive Behavioral Therapy for Diet on Postprandial Glucose and Pregnancy Outcomes in Gestational Diabetes Mellitus: Multicenter Randomized Controlled Trial. J Med Internet Res. 2025;27:e71075. doi:10.2196/71075