{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,10]],"date-time":"2026-10-10T21:59:04Z","timestamp":1791669544016,"version":"4.3.4"},"reference-count":31,"publisher":"Oxford University Press (OUP)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2007,4]]},"DOI":"10.1093\/ije\/dyl271","type":"journal-article","created":{"date-parts":[[2007,1,26]],"date-time":"2007-01-26T01:53:15Z","timestamp":1169776395000},"page":"412-419","source":"Crossref","is-referenced-by-count":145,"title":["Risk of early or severe preeclampsia related to pre-existing conditions"],"prefix":"10.1093","volume":"36","author":[{"given":"Janet M","family":"Catov","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Roberta B","family":"Ness","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin E","family":"Kip","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jorn","family":"Olsen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2007,1,25]]},"reference":[{"key":"key\n\t\t\t\t20170712080520_B1","first-page":"1","article-title":"Pregnancy-related mortality surveillance-United States 1991-1999","volume":"52","author":"Chang","year":"2003","journal-title":"MMWR Surveillance Summaries"},{"key":"key\n\t\t\t\t20170712080520_B2","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1161\/01.HYP.0000054981.03589.E9","article-title":"Summary of the NHLBI Working Group on Research on Hypertension During Pregnancy","volume":"41","author":"Roberts","year":"2003","journal-title":"Hypertension"},{"key":"key\n\t\t\t\t20170712080520_B3","doi-asserted-by":"crossref","first-page":"1003","DOI":"10.1016\/S0002-9378(97)70004-8","article-title":"Risk factors associated with preeclampsia in healthy nulliparous women. The Calcium for Preeclampsia Prevention (CPEP) Study Group","volume":"177","author":"Sibai","year":"1997","journal-title":"Am J Obstet Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B4","doi-asserted-by":"crossref","first-page":"1343","DOI":"10.1136\/bmj.316.7141.1343","article-title":"Fetal and maternal contributions to risk of pre-eclampsia: population based study","volume":"316","author":"Lie","year":"1998","journal-title":"Brit Med J"},{"key":"key\n\t\t\t\t20170712080520_B5","doi-asserted-by":"crossref","first-page":"422","DOI":"10.1067\/mob.2002.120280","article-title":"Perinatal outcome in women with recurrent preeclampsia compared with women who develop preeclampsia as nulliparas","volume":"186","author":"Hnat","year":"2002","journal-title":"Am J Obstet & Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B6","doi-asserted-by":"crossref","first-page":"410","DOI":"10.1016\/0002-9378(94)90276-3","article-title":"The prognosis of pregnancy in women with chronic hypertension","volume":"171","author":"Rey","year":"1994","journal-title":"Am J Obstet & Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B7","doi-asserted-by":"crossref","first-page":"13","DOI":"10.1111\/j.1471-0528.1980.tb04419.x","article-title":"Fetal growth retardation and preeclampsia","volume":"87","author":"Long","year":"1980","journal-title":"Br J Obstet Gynaecol"},{"key":"key\n\t\t\t\t20170712080520_B8","doi-asserted-by":"crossref","first-page":"1011","DOI":"10.1016\/0002-9378(86)90336-4","article-title":"Severe preeclampsia-eclampsia in young primigravid women: subsequent pregnacy outcome and remote prognosis","volume":"155","author":"Sibai","year":"1986","journal-title":"Am J Obstet Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B9","doi-asserted-by":"crossref","first-page":"1408","DOI":"10.1016\/S0002-9378(12)90773-5","article-title":"Severe preeclampsia in the second trimester: recurrence risk and long-term prognosis","volume":"165","author":"Sibai","year":"1991","journal-title":"Am J Obstet Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B10","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1016\/S0146-0005(03)00022-3","article-title":"What we have learned about preeclampsia","volume":"27","author":"Sibai","year":"2003","journal-title":"Semin Perinatol"},{"key":"key\n\t\t\t\t20170712080520_B11","doi-asserted-by":"crossref","first-page":"1213","DOI":"10.1136\/bmj.323.7323.1213","article-title":"Long term mortality of mothers and fathers after pre-eclampsia: population based cohort","volume":"323","author":"Irgens","year":"2001","journal-title":"Brit Med J"},{"key":"key\n\t\t\t\t20170712080520_B12","doi-asserted-by":"crossref","first-page":"2002","DOI":"10.1016\/S0140-6736(00)05112-6","article-title":"Pregnancy complications and maternal risk of ischaemic heart disease: a retrospective cohort study of 129,290 births","volume":"357","author":"Smith","year":"2001","journal-title":"Lancet"},{"key":"key\n\t\t\t\t20170712080520_B13","doi-asserted-by":"crossref","first-page":"667","DOI":"10.1056\/NEJM199809033391004","article-title":"Risk factors for preeclampsia, abruptio placentae, and adverse neonatal outcomes among women with chronic hypertension. National Institute of Child Health and Human Development Network of Maternal-Fetal Medicine Units","volume":"339","author":"Sibai","year":"1998","journal-title":"New Engl J Med"},{"key":"key\n\t\t\t\t20170712080520_B14","doi-asserted-by":"crossref","first-page":"701","DOI":"10.1056\/NEJM199803123381101","article-title":"Low-dose aspirin to prevent preeclampsia in women at high risk. National Institute of Child Health and Human Development Network of Maternal-Fetal Medicine Units","volume":"338","author":"Caritis","year":"1998","journal-title":"New Engl J Med"},{"key":"key\n\t\t\t\t20170712080520_B15","doi-asserted-by":"crossref","first-page":"565","DOI":"10.1136\/bmj.38380.674340.E0","article-title":"Risk factors for pre-eclampsia at antenatal booking: systematic review of controlled studies","volume":"330","author":"Duckitt","year":"2005","journal-title":"BMJ"},{"key":"key\n\t\t\t\t20170712080520_B16","doi-asserted-by":"crossref","first-page":"368","DOI":"10.1097\/01.EDE.0000059921.71494.D1","article-title":"Maternal body mass index and the risk of preeclampsia: a systematic overview","volume":"14","author":"O'Brien","year":"2003","journal-title":"Epidemiology"},{"key":"key\n\t\t\t\t20170712080520_B17","doi-asserted-by":"crossref","first-page":"475","DOI":"10.1016\/j.annepidem.2004.12.008","article-title":"The risk of preeclampsia rises with increasing prepregnancy body mass index","volume":"15","author":"Bodnar","year":"2005","journal-title":"Ann Epidemiol"},{"key":"key\n\t\t\t\t20170712080520_B18","doi-asserted-by":"crossref","first-page":"1294","DOI":"10.1111\/j.1471-0528.2004.00345.x","article-title":"Adverse maternal outcomes in multifetal pregnancies","volume":"111","author":"Walker","year":"2004","journal-title":"Brit J Obstet Gynaec"},{"key":"key\n\t\t\t\t20170712080520_B19","doi-asserted-by":"crossref","first-page":"300","DOI":"10.1080\/140349401317115268","article-title":"The Danish National Birth Cohort-its background, structure and aim","volume":"29","author":"Olsen","year":"2001","journal-title":"Scand J Public Health"},{"key":"key\n\t\t\t\t20170712080520_B20","article-title":"Preventing and Managing the Global Epidemic","volume-title":"WHO Tech Rep Ser 894","author":"WHO Consultation on Obesity. Obesity","year":"2000"},{"key":"key\n\t\t\t\t20170712080520_B21","doi-asserted-by":"crossref","first-page":"858","DOI":"10.1093\/ije\/dyh116","article-title":"Height and risk of severe pre-eclampsia. A study within the Danish National Birth Cohort","volume":"33","author":"Basso","year":"2004","journal-title":"Int J Epidemiol"},{"key":"key\n\t\t\t\t20170712080520_B22","doi-asserted-by":"crossref","first-page":"250","DOI":"10.1097\/01.AOG.0000172422.81496.57","article-title":"Prepregnancy obesity and fetal death","volume":"106","author":"Nohr","year":"2005","journal-title":"Obstet Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B23","doi-asserted-by":"crossref","first-page":"1365","DOI":"10.1016\/S0002-9378(96)70056-X","article-title":"Heterogeneous causes constituting the single syndrome of preeclampsia: a hypothesis and its implications","volume":"175","author":"Ness","year":"1996","journal-title":"Am J Obstet Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B24","doi-asserted-by":"crossref","first-page":"195","DOI":"10.1177\/096228020101000303","article-title":"A review of adjusted estimators of attributable risk","volume":"10","author":"Benichou","year":"2001","journal-title":"Stat Methods Med Res"},{"key":"key\n\t\t\t\t20170712080520_B25","volume-title":"Epidemiology in Medicine","author":"Hennekens","year":"1987"},{"key":"key\n\t\t\t\t20170712080520_B26","doi-asserted-by":"crossref","first-page":"783","DOI":"10.1093\/oxfordjournals.aje.a009523","article-title":"Confidence limits made easy: interval estimation using a substitution method","volume":"147","author":"Daly","year":"1998","journal-title":"Am J Epidemiol"},{"key":"key\n\t\t\t\t20170712080520_B27","doi-asserted-by":"crossref","first-page":"1003","DOI":"10.1016\/S0002-9378(97)70004-8","article-title":"Risk factors associated with preeclampsia in healthy nulliparous women. The Calcium for Preeclampsia Prevention (CPEP) Study Group","volume":"177","author":"Sibai","year":"1997","journal-title":"Am J Obstet Gynecol"},{"key":"key\n\t\t\t\t20170712080520_B28","doi-asserted-by":"crossref","first-page":"436","DOI":"10.2105\/AJPH.91.3.436","article-title":"Pregnancy complications and outcomes among overweight and obese nulliparous women","volume":"91","author":"Baeten","year":"2001","journal-title":"Am J Public Health"},{"key":"key\n\t\t\t\t20170712080520_B29","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1136\/jech.43.2.147","article-title":"The effect of leisure time physical activity on the risk of pre-eclampsia and gestational hypertension","volume":"43","author":"Marcoux","year":"1989","journal-title":"J Epidemiol Commun H"},{"key":"key\n\t\t\t\t20170712080520_B30","doi-asserted-by":"crossref","first-page":"758","DOI":"10.1093\/aje\/kwh277","article-title":"Work, leisure-time physical activity, and risk of preeclampsia and gestational hypertension","volume":"160","author":"Saftlas","year":"2004","journal-title":"Am J Epidemiol"},{"key":"key\n\t\t\t\t20170712080520_B31","doi-asserted-by":"crossref","first-page":"1273","DOI":"10.1161\/01.HYP.0000072270.82815.91","article-title":"Recreational physical activity during pregnancy and risk of preeclampsia","volume":"41","author":"Sorensen","year":"2003","journal-title":"Hypertension"}],"container-title":["International Journal of Epidemiology"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/academic.oup.com\/ije\/article-pdf\/36\/2\/412\/18479923\/dyl271.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2017,8,23]],"date-time":"2017-08-23T10:40:13Z","timestamp":1503484813000},"score":1,"resource":{"primary":{"URL":"https:\/\/academic.oup.com\/ije\/article-lookup\/doi\/10.1093\/ije\/dyl271"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2007,1,25]]},"references-count":31,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2007,1,25]]},"published-print":{"date-parts":[[2007,4]]}},"URL":"https:\/\/doi.org\/10.1093\/ije\/dyl271","relation":{},"ISSN":["1464-3685","0300-5771"],"issn-type":[{"value":"1464-3685","type":"electronic"},{"value":"0300-5771","type":"print"}],"subject":[],"published":{"date-parts":[[2007,1,25]]}}}