{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T04:36:22Z","timestamp":1790915782225,"version":"4.1.0"},"reference-count":24,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T00:00:00Z","timestamp":1588032000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100004440","name":"Wellcome Trust","doi-asserted-by":"publisher","award":["WT103975"],"award-info":[{"award-number":["WT103975"]}],"id":[{"id":"10.13039\/100004440","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100000024","name":"Canadian Institutes of Health Research","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000024","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":[[2020,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Young maternal age is associated with lower birthweight and higher rates of preterm birth and childhood hospitalisations. Internationally, teen pregnancy rates vary widely, reflecting differences in social, welfare, and health care factors in different cultural contexts.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To determine whether the increased risk of adverse infant outcomes among teenage mothers varies by country, reflecting different national teenage birth rates and country\u2010specific social\/welfare policies, in Scotland (higher teenage pregnancy rates), England, New South Wales (NSW; Australia), Ontario (Canada), and Sweden (lower rates).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We used administrative hospital data capturing 3\u00a0002\u00a0749 singleton births surviving to postnatal discharge between 2010 and 2014 (2008\u20102012 for Sweden). We compared preterm birth (24\u201036\u00a0weeks\u2019 gestation), mortality within 12\u00a0months of postnatal discharge, unplanned hospital admissions, and emergency department visits within 12\u00a0months of postnatal discharge, for infants born to mothers aged 15\u201019, 20\u201024, 25\u201029, and 30\u201034\u00a0years.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Compared to births to women aged 30\u201034\u00a0years, risks of adverse outcomes among teenage mothers were higher in all countries, but the magnitude of effects was not related to country\u2010specific rates of teenage births. Teenage mothers had between 1.2% (95% confidence interval [CI] 0.7, 1.7, Sweden) and 2.0% (95% CI 1.4, 2.5, NSW) more preterm births, and between 9.8 (95% CI 7.2, 12.4, England) and 19.7 (95% CI 8.7, 30.6, Scotland) more deaths per 10\u00a0000 infants, compared with mothers aged 30\u201034. Between 6.4% (95% CI 5.5, 7.4, NSW) and 25.4% (95% CI 24.7, 26.1, Ontario), more infants born to teenage mothers had unplanned hospital contacts compared with those born to mothers aged 30\u201034.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Regardless of country, infants born to teenage mothers had universally worse outcomes than those born to older mothers. This excess risk did not vary by national rates of livebirths to teenage mothers. Current mechanisms to support teenage mothers have not eliminated maternal age\u2010related disparities in infant outcomes; further strategies to mitigate excess risk in all countries are needed.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ppe.12685","type":"journal-article","created":{"date-parts":[[2020,4,28]],"date-time":"2020-04-28T09:06:44Z","timestamp":1588064804000},"page":"645-654","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Preterm birth, unplanned hospital contact, and mortality in infants born to teenage mothers in five countries: An administrative data cohort study"],"prefix":"10.1111","volume":"34","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3418-2856","authenticated-orcid":false,"given":"Katie","family":"Harron","sequence":"first","affiliation":[{"name":"Institute of Child Health University College London London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maximiliane","family":"Verfuerden","sequence":"additional","affiliation":[{"name":"Institute of Child Health University College London London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6024-2958","authenticated-orcid":false,"given":"Ibinabo","family":"Ibiebele","sequence":"additional","affiliation":[{"name":"Royal North Shore Hospital The University of Sydney Northern Clinical School Sydney NSW Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Can","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Public Health Sciences Centre for Health Equity Studies (CHESS) Stockholm University Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alex","family":"Kopp","sequence":"additional","affiliation":[{"name":"The Institute for Clinical Evaluative Sciences Toronto ON Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Astrid","family":"Guttmann","sequence":"additional","affiliation":[{"name":"The Institute for Clinical Evaluative Sciences Toronto ON Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jane","family":"Ford","sequence":"additional","affiliation":[{"name":"Royal North Shore Hospital The University of Sydney Northern Clinical School Sydney NSW Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan","family":"van der Meulen","sequence":"additional","affiliation":[{"name":"London School of Hygiene and Tropical Medicine London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anders","family":"Hjern","sequence":"additional","affiliation":[{"name":"Department of Public Health Sciences Centre for Health Equity Studies (CHESS) Stockholm University Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9347-2709","authenticated-orcid":false,"given":"Ruth","family":"Gilbert","sequence":"additional","affiliation":[{"name":"Institute of Child Health University College London London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2020,4,28]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.acap.2010.06.008"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1111\/ppe.12162"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1093\/ije\/dyr084"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(13)62071-1"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jadohealth.2014.09.007"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.18584\/iipj.2013.4.1.9"},{"key":"e_1_2_9_8_1","unstructured":"Australian Institute of Health and Welfare.Australia's mothers and babies 2015 \u2013 in brief.Canberra Australia:AIHW;2017.www.aihw.gov.au\/reports\/mothers\u2010babies\/australias\u2010mothers\u2010babies\u20102015\u2010in\u2010brief\/contents\/table\u2010of\u2010contents. 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