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This study hypothesized that prepregnancy weight gain may portend excess GWG.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Among 1,126 women (51% of whom were of Black race) in the Coronary Artery Risk Development in Young Adults (CARDIA) study with post\u2010baseline births, the prepregnancy annual rate of BMI change per woman was estimated (slope; 5 years before pregnancy) and was related to the risk of GWG above Institute of Medicine recommendations using mixed\u2010effects models (binary) and GWG <jats:italic>z<\/jats:italic> score (continuous), adjusting for confounders, and stratified by prepregnancy overweight\/obesity status.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 626 women (56%) had excess GWG. Each standard deviation increase in prepregnancy BMI (0.16 kg\/m<jats:sup>2<\/jats:sup> per year) was associated with an 18% increased risk of excess GWG (95% CI: 1.13\u20101.23), adjusted for covariates. Stratified results showed an association for women without overweight or obesity (adjusted relative risk = 1.71 [95% CI: 1.38\u20102.13]) but not among those with overweight or obesity (adjusted relative risk = 0.98 [95% CI: 0.91\u20101.05]). When evaluated as a <jats:italic>z<\/jats:italic> score, prepregnancy weight gain was associated with higher GWG among women with and without overweight or obesity (mean = 0.24 [0.10] and 0.28 [0.12] <jats:italic>z<\/jats:italic> score, respectively).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Weight gain before pregnancy is associated with higher GWG during pregnancy. Assessment of prepregnancy weight changes may identify those at risk for high GWG.<\/jats:p><\/jats:sec>","DOI":"10.1002\/oby.23354","type":"journal-article","created":{"date-parts":[[2022,1,26]],"date-time":"2022-01-26T10:34:19Z","timestamp":1643193259000},"page":"524-534","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Prepregnancy weight change associated with high gestational weight gain"],"prefix":"10.1002","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9551-851X","authenticated-orcid":false,"given":"Janet M.","family":"Catov","sequence":"first","affiliation":[{"name":"Department of Obstetrics, Gynecology and Reproductive Sciences School of Medicine Magee\u2010Women\u2019s Research Institute University of Pittsburgh  Pittsburgh Pennsylvania USA"},{"name":"Department of Epidemiology Graduate School of Public Health University of Pittsburgh  Pittsburgh Pennsylvania 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