Breastfeeding was associated with a lower rate of type 2 diabetes for up to 2 years after childbirth among women who had gestational diabetes and may have lasting effects that reduce a woman’s chance of developing type 2 diabetes, according to a study of 1,010 women without diabetes at baseline and who were evaluated up to 2 years later. Researchers found:
• 11.8% developed type 2 diabetes.
• Inverse associations for lactation intensity at baseline with incident type 2 diabetes and adjusted hazard ratios of 0.64, 0.54, and 0.46 for mostly formula or mixed/inconsistent, mostly lactation, and exclusive lactation vs exclusive formula feeding, respectively.
• Time-dependent lactation duration showed graded inverse associations with incident type 2 diabetes and adjusted hazard ratios of 0.55, 0.50, and 0.43 for >5 to 10 months, and >10 months, respectively, vs 0 to 2 months.
Citation: Gunderson EP, Hurston SR, Ning X, et al. Lactation and progression to type 2 diabetes mellitus after gestational diabetes mellitus: a prospective cohort study. Ann Intern Med. 2015;163(12)889-898. doi: 10.7326/M15-0807.