{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T14:27:42Z","timestamp":1792420062785,"version":"4.5.0"},"reference-count":36,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2018,10,16]],"date-time":"2018-10-16T00:00:00Z","timestamp":1539648000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000071","name":"National Institute of Child Health and Human Development","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100000071","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Paediatric Perinatal Epid"],"published-print":{"date-parts":[[2019,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Previous studies have demonstrated that short interpregnancy interval (the interval between delivery and estimated last menstrual period of a subsequent pregnancy) is associated with small for gestational age birth. It is controversial if this association is causal, as few studies have accounted for likely confounding factors such as unintended pregnancy. We examined the association between interpregnancy interval and infant birthweight, adjusting for pregnancy intention and other socio\u2010economic and obstetrical risk factors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We used data from the Scandinavian Successive Small\u2010for\u2010Gestational\u2010Age births study (1986\u20101988). Birthweight was expressed as a gestational age\u2010standardised <jats:italic>z<\/jats:italic>\u2010score.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Among 1406 women, a trend towards lower birthweight <jats:italic>z<\/jats:italic>\u2010score with short interpregnancy interval was not statistically significant (unadjusted difference in birthweight <jats:italic>z<\/jats:italic>\u2010score of \u22120.25, 95% confidence interval (CI) \u22120.55, 0.05). After adjusting for pregnancy intention, detailed measures of socio\u2010economic status, and other covariates, the estimated magnitude of effect between interpregnancy interval and birthweight <jats:italic>z<\/jats:italic>\u2010score was further attenuated (adjusted difference in birthweight <jats:italic>z<\/jats:italic>\u2010score of \u22120.13, 95% CI \u22120.46, 0.20).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In this cohort study with detailed information on pregnancy intention and socio\u2010economic status, short interpregnancy interval was not associated with lower birthweight. These findings suggest that previously observed associations between short interpregnancy interval and lower birthweight may reflect confounding by socio\u2010economic and\/or other unmeasured confounders.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ppe.12506","type":"journal-article","created":{"date-parts":[[2018,10,16]],"date-time":"2018-10-16T20:18:05Z","timestamp":1539721085000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Short interpregnancy interval and poor fetal growth: Evaluating the role of pregnancy intention"],"prefix":"10.1111","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1573-5574","authenticated-orcid":false,"given":"Jessica","family":"Liauw","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynaecology University of British Columbia  Vancouver British Columbia Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Geir W.","family":"Jacobsen","sequence":"additional","affiliation":[{"name":"Department of Public Health and Nursing Faculty of Medicine and Health Sciences Norwegian University of Science and Technology  Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tricia L.","family":"Larose","sequence":"additional","affiliation":[{"name":"Department of Public Health and Nursing Faculty of Medicine and Health Sciences Norwegian University of Science and Technology  Trondheim Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0502-3423","authenticated-orcid":false,"given":"Jennifer A.","family":"Hutcheon","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology University of British Columbia  Vancouver British Columbia Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2018,10,16]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1001\/jama.295.15.1809"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-3016.2012.01285.x"},{"key":"e_1_2_9_4_1","unstructured":"Report of a WHO Technical Consultation on Birth Spacing [Internet].Geneva: World Health Organization;2007[updated 15\/06\/2007; cited 01\/09\/2017]. 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