{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T20:24:27Z","timestamp":1792787067554,"version":"4.5.0"},"reference-count":41,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2013,10,30]],"date-time":"2013-10-30T00:00:00Z","timestamp":1383091200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100008309","name":"Bloomberg School of Public Health","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100008309","id-type":"DOI","asserted-by":"crossref"}]},{"name":"the China State Scholarships Fund and the Cheryl Alexander-Memorial Fund"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Paediatrics Child Health"],"published-print":{"date-parts":[[2013,11]]},"abstract":"<jats:sec>\n                    <jats:title>Aims<\/jats:title>\n                    <jats:p>\n                      This study was conducted to determine the prevalence and the associated factors for unintended pregnancy among never\u2010married sexually active youth (15\u201324 years old) in\n                      <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>\n                      hanghai.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Using a probability sample (\n                      <jats:italic>n<\/jats:italic>\n                      = 765, including 502 males and 263 females) from 2006, we estimated prevalence of unintended pregnancy involvement for females and males by demographic factors and its associations with contextual and behavioural factors, guided by a social\u2010ecological framework.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Weighted proportion analyses estimated that 13.8% of females and 17.7% of males had been involved in an unintended pregnancy, and 99.0% and 90.5% of such pregnancies were reported to have ended in abortion by females and males, respectively. Controlling for sexual behaviour factors and residence history, multivariate hazard analyses with\n                      <jats:styled-content style=\"fixed-case\">W<\/jats:styled-content>\n                      eibull functions found increased hazard among older female youth (19\u201321 vs. 15\u201318 years old) but decreased hazard among older male youth (15\u201318 vs. 19\u201321\/22\u201324 years old) as compared with the younger groups. Parallel analyses of unintended pregnancy's associations with contextual factors by sex also suggested that female unintended pregnancy involvement was more likely to be associated with family factors (family living arrangements and maternal education), while unintended pregnancy involvement among males was only associated with school factors (school climate and sex education on pregnancy) and perceived neighbourhood contraceptive services access.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      Sexually active and never\u2010married youth are at considerable risk of unintended pregnancy and abortion in\n                      <jats:styled-content style=\"fixed-case\">S<\/jats:styled-content>\n                      hanghai. Age\u2010 and sex\u2010specific strategies will be needed if\n                      <jats:styled-content style=\"fixed-case\">C<\/jats:styled-content>\n                      hina is going to be successful in addressing unintended pregnancy.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/jpc.12426","type":"journal-article","created":{"date-parts":[[2013,10,30]],"date-time":"2013-10-30T00:55:03Z","timestamp":1383094503000},"page":"912-918","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Prevalence of unintended pregnancy and its associated factors among sexually active never\u2010married youth in\n                    <scp>S<\/scp>\n                    hanghai"],"prefix":"10.1111","volume":"49","author":[{"given":"Huan","family":"He","sequence":"first","affiliation":[{"name":"Department of Population, Family and Reproductive Health Bloomberg School of Public Health, Johns Hopkins University  Baltimore Maryland United States"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert W","family":"Blum","sequence":"additional","affiliation":[{"name":"Department of Population, Family and Reproductive Health Bloomberg School of Public Health, Johns Hopkins University  Baltimore Maryland United States"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2013,10,30]]},"reference":[{"key":"e_1_2_9_2_1","unstructured":"FarrerJ.Opening up: youth sex culture and market reform in Shanghai.2002."},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.2307\/3177788"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.2307\/2950053"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1017\/S030574100003335X"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1080\/09540129947730"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1745-7262.2008.00413.x"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1728-4465.2009.00182.x"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1542\/peds.2006-2426"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1177\/019394590102300208"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.314.7095.1685"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.contraception.2007.10.008"},{"key":"e_1_2_9_13_1","first-page":"102","article-title":"Social, economic and health costs of unintended pregnancy: the Circle of Care program in Troup County, Georgia","volume":"39","author":"Hunt B","year":"2010","journal-title":"Ann. 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