{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T23:44:03Z","timestamp":1773013443327,"version":"3.50.1"},"reference-count":26,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2017,11,6]],"date-time":"2017-11-06T00:00:00Z","timestamp":1509926400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100004920","name":"Royan Institute","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100004920","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Intl J Gynecology &amp; Obste"],"published-print":{"date-parts":[[2018,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To evaluate associations between a history of spontaneous abortion and preterm delivery during subsequent pregnancies.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The present secondary analysis included cross\u2010sectional survey data related to all deliveries at 103 hospitals in Tehran, Iran, between July 6 and 21, 2015. Trained midwives interviewed patients within 24\u00a0hours of delivery. Adjusted odds ratios (ORs) with 95% confidence intervals (CIs) were calculated to investigate associations between spontaneous abortion and preterm delivery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Data were included from 4991 deliveries. A history of spontaneous abortion (OR 1.50, 95% CI 1.21\u20131.87; <jats:italic>P=<\/jats:italic>0.001) and history of recurrent spontaneous abortion (OR 3.74, 95% CI 1.90\u20137.37; <jats:italic>P=<\/jats:italic>0.001) were associated with increased odds of preterm delivery in comparison with no such history. Similarly, one (OR 1.33, 95% CI 1.04\u20131.70; <jats:italic>P=<\/jats:italic>0.023), two (OR 1.78, 95% CI 1.15\u20132.74; <jats:italic>P=<\/jats:italic>0.009), or at least three prior spontaneous abortions (OR 4.10, 95% CI 2.08\u20138.08; <jats:italic>P=<\/jats:italic>0.001) were associated with increased odds of preterm delivery compared with none. Population attributable fractions of 9.49% (95% CI 3.36\u201315.12) and 2.00% (95% CI 0.57\u20133.56) were calculated for histories of spontaneous abortion and recurrent pregnancy loss, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>History of spontaneous abortion and history of recurrent pregnancy loss were associated with increased odds of preterm delivery. A greater number of spontaneous abortions corresponded to greater odds of preterm delivery.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ijgo.12348","type":"journal-article","created":{"date-parts":[[2017,10,12]],"date-time":"2017-10-12T09:18:46Z","timestamp":1507799926000},"page":"81-86","source":"Crossref","is-referenced-by-count":12,"title":["Cross\u2010sectional study of associations between prior spontaneous abortions and preterm delivery"],"prefix":"10.1002","volume":"140","author":[{"given":"Reza","family":"Omani\u2010Samani","sequence":"first","affiliation":[{"name":"Department of Epidemiology and Reproductive Health Reproductive Epidemiology Research Center Royan Institute for Reproductive Biomedicine ACECR  Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohammad A.","family":"Mansournia","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Biostatistics School of Public Health Tehran University of Medical Sciences  Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mahdi","family":"Sepidarkish","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Reproductive Health Reproductive Epidemiology Research Center Royan Institute for Reproductive Biomedicine ACECR  Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Amir","family":"Almasi\u2010Hashiani","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Reproductive Health Reproductive Epidemiology Research Center Royan Institute for Reproductive Biomedicine ACECR  Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Saeid","family":"Safiri","sequence":"additional","affiliation":[{"name":"Managerial Epidemiology Research Center Department of Public Health School of Nursing and Midwifery Maragheh University of Medical Sciences  Maragheh Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Samira","family":"Vesali","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Reproductive Health Reproductive Epidemiology Research Center Royan Institute for Reproductive Biomedicine ACECR  Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Payam","family":"Amini","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Reproductive Health Reproductive Epidemiology Research Center Royan Institute for Reproductive Biomedicine ACECR  Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Saman","family":"Maroufizadeh","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Reproductive Health Reproductive Epidemiology Research Center Royan Institute for Reproductive Biomedicine ACECR  Tehran Iran"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2017,11,6]]},"reference":[{"key":"e_1_2_8_2_1","unstructured":"World Health Organization.Preterm birth Fact sheet. 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