Interpregnancy Weight Change and Hypertension During Pregnancy: A Systematic Review and Meta-analysis.

ABSTRACT

OBJECTIVE: To synthesize evidence regarding the association between interpregnancy weight change and hypertensive disorders of pregnancy. DATA SOURCES MEDLINE, EMBASE, Cochrane Library, Web of Science, and ClinicalTrials.gov databases were systematically searched from the databases' interception until April 2019. Search strategy included the terms "interpregnancy," "intergestational," "hypertension" and "hypertensive disorders." METHODS OF STUDY SELECTION Studies that assessed the relationship between interpregnancy weight change and hypertensive disorders of pregnancy were included. Twelve studies and 415,605 women were included in this systematic review and meta-analysis. We used Mendeley reference manager during the review process. Odds ratios (ORs) for the most adjusted models reported by the included articles and the corresponding 95% CIs were calculated. The no weight change category defined by each study was used as the reference category. TABULATION, INTEGRATION, AND RESULTS: Overall, there was an increased risk of hypertensive disorders of pregnancy associated with interpregnancy weight gain (OR 1.37; 95% CI 1.21-1.53; I=62.1%; P<.001). Additionally, interpregnancy weight loss was associated with lower risk of developing hypertensive disorders of pregnancy (OR 0.87; 95% CI 0.75-0.99; I=54.9%; P=.01), Finally, meta-regression showed that interpregnancy weight gain was associated with a graded increase in the risk of hypertensive disorders of pregnancy. CONCLUSION: This systematic review and meta-analysis provides evidence that interpregnancy weight gain is associated with an increased risk of hypertensive disorders of pregnancy, gestational hypertension, and preeclampsia. SYSTEMATIC REVIEW REGISTRATION PROSPERO, CRD42018103002.