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Associations between readmissions due to HG and age, gravidity, parity, pre-pregnancy body mass index (BMI), smoking, marital status, socioeconomic status, municipality population, assisted reproductive technology (ART), and number and sex of fetuses were analyzed in pregnancies resulting in delivery. Admissions and readmissions due to HG in deliveries, gestational trophoblastic disease, ectopic pregnancies, miscarriages and pregnancy terminations were calculated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      10,381 pregnancies with HG diagnosis were identified: 9518 live births, 31 stillbirths, 8 cases of gestational trophoblastic disease, 16 ectopic pregnancies, 299 miscarriages, and 509 pregnancy terminations. Both outpatients and inpatients were included. Readmission occurred in 60% of pregnancies, inpatient readmission in 17%. Parity of\u2009\u2265\u20095, multiple gestation and female sex of fetus were associated with higher odds of readmission, maternal age 36\u201340\u00a0years, BMI\u2009\u2265\u200935\u00a0kg\/m\n                      <jats:sup>2<\/jats:sup>\n                      , smoking and ART with lower odds of readmission. Of the 9549 pregnancies resulting in delivery, 33% involved at least one outpatient visit or inpatient episode after the first trimester, and 8% in the third trimester.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>The majority of women suffering from HG needed repeated medical care, often persisting after the first trimester. Our results provide practical information allowing clinicians to prepare for symptom duration beyond the first trimester and emphasize the importance of planning for eventual long-term treatment.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00404-022-06448-w","type":"journal-article","created":{"date-parts":[[2022,2,28]],"date-time":"2022-02-28T06:03:13Z","timestamp":1646028193000},"page":"1519-1529","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Readmissions due to hyperemesis gravidarum: a nation-wide Finnish register study"],"prefix":"10.1007","volume":"306","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8186-4860","authenticated-orcid":false,"given":"Miina","family":"Nurmi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P\u00e4ivi","family":"Rautava","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mika","family":"Gissler","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tero","family":"Vahlberg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P\u00e4ivi","family":"Polo-Kantola","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,2,28]]},"reference":[{"key":"6448_CR1","first-page":"94","volume":"100","author":"JA Gazmararian","year":"2002","unstructured":"Gazmararian JA, Petersen R, Jamieson DJ, Schild L, Adams MM, Deshpande AD, Franks AL (2002) Hospitalizations during pregnancy among managed care enrollees. 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Nutr Metab Insights 8:33\u201339","journal-title":"Nutr Metab Insights"}],"container-title":["Archives of Gynecology and Obstetrics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00404-022-06448-w.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00404-022-06448-w\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00404-022-06448-w.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,11,18]],"date-time":"2023-11-18T00:37:21Z","timestamp":1700267841000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00404-022-06448-w"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,2,28]]},"references-count":52,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2022,11]]}},"alternative-id":["6448"],"URL":"https:\/\/doi.org\/10.1007\/s00404-022-06448-w","relation":{},"ISSN":["1432-0711"],"issn-type":[{"value":"1432-0711","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,2,28]]},"assertion":[{"value":"21 September 2020","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"9 February 2022","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"28 February 2022","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors report no conflicts of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"The study plan was evaluated and approved by the Ethical committee of Hospital District of Southwest Finland (43\/180\/2011).","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval"}},{"value":"Not applicable; our research data are based on mandatory health registers, which are collected on the basis of Finnish health register legislation without informed consent. The use of register data is possible after the data keeping organizations have authorized the use of their data.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"Not applicable.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}}]}}