{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T20:23:29Z","timestamp":1792787009654,"version":"4.5.0"},"reference-count":27,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2015,4,17]],"date-time":"2015-04-17T00:00:00Z","timestamp":1429228800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"NFOG- Nordic Federation of Societies of Obstetrics and Gynecology"},{"name":"Tryg Fonden"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2015,7]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To assess the rates and characteristics of women with complete uterine rupture, abnormally invasive placenta, peripartum hysterectomy, and severe blood loss at delivery in the Nordic countries.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Design<\/jats:title>\n                    <jats:p>Prospective, Nordic collaboration.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Setting<\/jats:title>\n                    <jats:p>\n                      The Nordic Obstetric Surveillance Study (\n                      <jats:styled-content style=\"fixed-case\">NOSS<\/jats:styled-content>\n                      ) collected cases of severe obstetric complications in the Nordic countries from April 2009 to August 2012.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Sample and methods<\/jats:title>\n                    <jats:p>Cases were reported by clinicians at the Nordic maternity units and retrieved from medical birth registers, hospital discharge registers, and transfusion databases by using International Classification of Diseases, 10th revision codes on diagnoses and the Nordic Medico\u2010Statistical Committee Classification of Surgical Procedure codes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Main outcome measures<\/jats:title>\n                    <jats:p>Rates of the studied complications and possible risk factors among parturients in the Nordic countries.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The studied complications were reported in 1019 instances among 605\u00a0362 deliveries during the study period. The reported rate of severe blood loss at delivery was 11.6\/10\u00a0000 deliveries, complete uterine rupture was 5.6\/10\u00a0000 deliveries, abnormally invasive placenta was 4.6\/10\u00a0000 deliveries, and peripartum hysterectomy was 3.5\/10\u00a0000 deliveries. Of the women, 25% had two or more complications. Women with complications were more often &gt;35\u00a0years old, overweight, with a higher parity, and a history of cesarean delivery compared with the total population.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>\n                      The studied obstetric complications are rare. Uniform definitions and valid reporting are essential for international comparisons. The main risk factors include previous cesarean section. The detailed information collected in the\n                      <jats:styled-content style=\"fixed-case\">NOSS<\/jats:styled-content>\n                      database provides a basis for epidemiologic studies, audits, and educational activities.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1111\/aogs.12639","type":"journal-article","created":{"date-parts":[[2015,4,1]],"date-time":"2015-04-01T13:37:11Z","timestamp":1427895431000},"page":"734-744","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":67,"title":["The Nordic Obstetric Surveillance Study: a study of complete uterine rupture, abnormally invasive placenta, peripartum hysterectomy, and severe blood loss at delivery"],"prefix":"10.1111","volume":"94","author":[{"given":"Lotte B.","family":"Colmorn","sequence":"first","affiliation":[{"name":"Department of Obstetrics Rigshospitalet Copenhagen University Hospital\/University of Copenhagen Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kathrine B.","family":"Petersen","sequence":"additional","affiliation":[{"name":"Fertility Clinic Rigshospitalet Copenhagen University Hospital Copenhagen Denmark"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maija","family":"Jakobsson","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Helsinki University Central Hospital Helsinki Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pelle G.","family":"Lindqvist","sequence":"additional","affiliation":[{"name":"Clinitec Karolinska Institute\/Department of Gynecology and Obstetrics Karolinska University Hospital Stockholm Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kari","family":"Klungsoyr","sequence":"additional","affiliation":[{"name":"Department of Global Public Health and Primary Care University of Bergen\/Medical Birth Register of Norway Norwegian Institute of Public Health Bergen Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karin","family":"K\u00e4llen","sequence":"additional","affiliation":[{"name":"Epidemiology and Methodological Support Unit Department of Evaluation and Analysis National Board of Health and Welfare Stockholm Sweden"},{"name":"Department of Obstetrics and Gynecology Institution of Clinical Sciences University of Lund Lund Sweden"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ragnheidur I.","family":"Bjarnadottir","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology Landspitali University Hospital Reykjavik Iceland"},{"name":"Icelandic Medical Birth Register Reykjavik Iceland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna\u2010Maija","family":"Tapper","sequence":"additional","affiliation":[{"name":"Department of Gynecology and Pediatrics Helsinki University Central Hospital Helsinki 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