biostudies-literatureFrey HANCATS NIH HHSe2218986https://www.ebi.ac.uk/biostudies/studies/S-EPMC9240907biostudies-literatureUnknown5(6)<h4>Importance</h4>The association between body mass index (BMI, which is calculated as weight in kilograms divided by height in meters squared) and severe maternal morbidity (SMM) and/or mortality is uncertain, judging from the current evidence.<h4>Objective</h4>To examine the association between prepregnancy BMI and SMM and/or mortality through 1 year post partum and to identify both the direct and indirect implications of maternal obesity for SMM and/or mortality by examining hypertensive disorders and pregestational diabetes as potential mediators.<h4>Design, setting, and participants</h4>This population-based cohort study was conducted from March to October 2021 using the vital records and linked Medicaid claims data in the state of Ohio from January 1, 2012, through December 31, 2017JAMA network openAssociation of Prepregnancy Body Mass Index With Risk of Severe Maternal Morbidity and Mortality Among Medicaid Beneficiaries.PMC9240907UL1 TR002733Oza-Frank RFarmer AKim YHShellhaas CLynch CDFrey HACostantine MMJackson RDAshmead RfalseAssociation of Prepregnancy Body Mass Index With Risk of Severe Maternal Morbidity and Mortality Among Medicaid Beneficiaries.<h4>Importance</h4>The association between body mass index (BMI, which is calculated as weight in kilograms divided by height in meters squared) and severe maternal morbidity (SMM) and/or mortality is uncertain, judging from the current evidence.<h4>Objective</h4>To examine the association between prepregnancy BMI and SMM and/or mortality through 1 year post partum and to identify both the direct and indirect implications of maternal obesity for SMM and/or mortality by examining hypertensive disorders and pregestational diabetes as potential mediators.<h4>Design, setting, and participants</h4>This population-based cohort study was conducted from March to October 2021 using the vital records and linked Medicaid claims data in the state of Ohio from January 1, 2012, through December 31, 20172022-01-01T00:00:00Z2022 Jun2025-04-04T03:06:09.043Z2025-04-04T03:06:09.043ZS-EPMC92409073576329710.1001/jamanetworkopen.2022.18986