{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T09:45:21Z","timestamp":1775123121708,"version":"3.50.1"},"reference-count":40,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2019,6,23]],"date-time":"2019-06-23T00:00:00Z","timestamp":1561248000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Paediatric Perinatal Epid"],"published-print":{"date-parts":[[2020,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Severe maternal morbidity continues to be on the rise in the US. Short birth spacing is a modifiable risk factor associated with maternal morbidity, yet few studies have examined this association, possibly due to few available data sources to examine these rare events.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>To examine the association between interpregnancy interval (IPI) and severe maternal morbidity using near\u2010national birth certificate data and account for known under\u2010reporting using probabilistic bias analysis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We used revised 2014\u20102017 birth certificate data, restricting to resident women with a non\u2013first\u2010born singleton birth. We examined the following: (a) maternal blood transfusion, (b) admission to intensive care unit (ICU), (c) uterine rupture (among women with a prior caesarean delivery) and (d) third\u2010 or fourth\u2010degree perineal laceration (among vaginal deliveries) by IPI categories (&lt;6, 6\u201011, 12\u201017, 18\u201023, 24\u201059 and 60+\u00a0months). Risk ratios and 95% confidence intervals were estimated using log\u2010binomial regression, adjusting for select maternal characteristics. Probabilistic bias analyses were performed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Compared with IPI 18 to 23\u00a0months, adjusted models revealed that the risk of maternal transfusion followed a U\u2010shaped curve with IPI, while risk of ICU admission and perineal laceration increased with longer IPI. Risk of uterine rupture was highest among IPI &lt;6\u00a0months. With the exception of maternal transfusion, these findings persisted regardless of the extent or type of misclassification examined in bias analyses.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Associations between IPI and maternal morbidity varied by outcome, even after adjusting for misclassification of SMM. Differences across maternal health outcomes should be considered when counselling and making recommendations regarding optimal birth spacing.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ppe.12560","type":"journal-article","created":{"date-parts":[[2019,6,24]],"date-time":"2019-06-24T01:09:01Z","timestamp":1561338541000},"page":"469-480","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["The association between interpregnancy interval and severe maternal morbidities using revised national birth certificate data: A probabilistic bias analysis"],"prefix":"10.1111","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6558-2716","authenticated-orcid":false,"given":"Dane A.","family":"De Silva","sequence":"first","affiliation":[{"name":"Department of Family Science, School of Public Health University of Maryland College Park Maryland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9267-4384","authenticated-orcid":false,"given":"Marie E.","family":"Thoma","sequence":"additional","affiliation":[{"name":"Department of Family Science, School of Public Health University of Maryland College Park Maryland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2019,6,23]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2016.07.050"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000001810"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/AOG.0000000000001556"},{"key":"e_1_2_8_5_1","unstructured":"Severe Maternal Morbidity in the United States. 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