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We aimed to study the influence of (1) pre-pregnancy weight on the risk of eGDM diagnosed in two time intervals; and (2) in addition, the rate of GWG by 12\u00a0weeks on the risk of eGDM diagnosed in 19\u201324\u00a0weeks.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Method<\/jats:title>\n                <jats:p>Our study utilized real-world clinical data on pregnant women routinely collected at an antenatal care clinic at a private tertiary hospital, in Pune, India. Women registering before 12\u00a0weeks of gestation (v<jats:sub>1<\/jats:sub>), with a singleton pregnancy, and having a follow-up visit between 19\u201324\u00a0weeks (v<jats:sub>2<\/jats:sub>) were included (<jats:italic>n<\/jats:italic>\u2009=\u2009600). The oral glucose tolerance test was conducted universally as per Indian guidelines (DIPSI) at v<jats:sub>1<\/jats:sub> and v<jats:sub>2<\/jats:sub> for diagnosing eGDM. The data on the onset time of eGDM were interval censored; hence, we modeled the risk of eGDM using binomial regression to assess the influence of pre-pregnancy weight on the risk of eGDM in the two intervals. The rate of GWG by 12\u00a0weeks was added to assess its impact on the risk of eGDM diagnosed in v<jats:sub>2<\/jats:sub>.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Result<\/jats:title>\n                <jats:p>Overall, 89 (14.8%) women (age 32\u2009\u00b1\u20094\u00a0years) were diagnosed with eGDM by 24\u00a0weeks, of which 59 (9.8%) were diagnosed before 12\u00a0weeks and 30 of 541 (5.5%) women were diagnosed between 19\u201324\u00a0weeks. Two-thirds (66%) of eGDM were diagnosed before 12\u00a0weeks of gestation. Women\u2019s pre-pregnancy weight was positively associated with the risk of GDM in both time intervals though the lower confidence limit was below zero in v<jats:sub>1<\/jats:sub>. The rate of GWG by 12\u00a0weeks was not observed to be associated with the risk of eGDM diagnosed between 19\u201324\u00a0weeks of gestation. These associations were independent of age, height, and parity.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>Health workers may focus on pre-pregnancy weight, a modifiable risk factor for eGDM. A larger community-based study measuring weight and GDM status more frequently may be warranted to deepen the understanding of the role of GWG as a risk factor for GDM.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12884-023-05907-9","type":"journal-article","created":{"date-parts":[[2023,8,15]],"date-time":"2023-08-15T14:02:50Z","timestamp":1692108170000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Pre-pregnancy weight, the rate of gestational weight gain, and the risk of early gestational diabetes mellitus among women registered in a tertiary care hospital in India"],"prefix":"10.1186","volume":"23","author":[{"given":"Swapna","family":"Deshpande","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tarja I.","family":"Kinnunen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anuradha","family":"Khadilkar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jyothi","family":"Unni","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vandana","family":"Khanijo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Namrata","family":"Donga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sangita","family":"Kulathinal","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,8,15]]},"reference":[{"key":"5907_CR1","unstructured":"American Diabetes Association. 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