Postpregnancy BMI in the Progression From Hypertensive Disorders of Pregnancy to Type 2 Diabetes

Research output: Contribution to journalArticle

Abstract

OBJECTIVE: To study the extent to which BMI after pregnancy adds to the elevated risk of postpregnancy type 2 diabetes in women with a history of hypertensive disorders of pregnancy (HDP) (preeclampsia or gestational hypertension).

RESEARCH DESIGN AND METHODS: We used data from the Nurses' Health Study II, a prospective cohort study. In women aged 45-54 years without prior gestational diabetes mellitus, we investigated the interaction between BMI and HDP history on the risk of type 2 diabetes. For clinical and public health relevance, we focused on additive interaction. The main outcome measure was the relative excess risk due to interaction calculated from multivariable Cox proportional hazards models using normal weight as the reference group.

RESULTS: In total, 6,563 (11.7%) of 56,159 participants had a history of HDP and 1,341 women developed type 2 diabetes during 436,333 person-years. BMI was a strong risk factor for type 2 diabetes regardless of HDP history. However, there was evidence of an additive interaction between BMI and HDP for the risk of type 2 diabetes (P = 0.004). The attributable proportion of risk due to the interaction ranged from 0.12 (95% CI -0.22, 0.46) in women who were overweight to 0.36 (95% CI 0.13, 0.59) in women with obesity class I.

CONCLUSIONS: Maintaining a healthy weight may be of even greater importance in women with a history of HDP, compared with other women with a history of only normotensive pregnancies, to reduce midlife risk of type 2 diabetes.

Details

Authors
Organisations
External organisations
  • Harvard Medical School
  • Harvard T.H. Chan School of Public Health
  • Brigham and Women's Hospital, Boston
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Endocrinology and Diabetes
Original languageEnglish
Pages (from-to)44-49
JournalDiabetes Care
Volume42
Issue number1
Early online date2018 Nov 19
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes