{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T17:36:46Z","timestamp":1789839406268,"version":"4.0.1"},"reference-count":35,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2022,2,25]],"date-time":"2022-02-25T00:00:00Z","timestamp":1645747200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Obstet and Gynaecol"],"published-print":{"date-parts":[[2022,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>This study examined the maternal experience of threatened abortion, threatened premature labor, or preterm birth before, during, and after the first state of emergency for COVID\u201019 in 2020 in Japan.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This was a cross\u2010sectional, internet\u2010based questionnaire survey. We recruited 600 postpartum women and divided them into three groups by date of delivery: before (October 2019\u2013March 2020), during (April\u2013May 2020), and after (June\u2013October 2020) the first state of emergency. The outcome was the presence of at least one of the following complications: threatened abortion, threatened premature labor, and\/or preterm birth. The prevalence ratios (PRs) of the outcome were calculated and compared among the three groups using a multivariable Poisson regression model with adjustment for potential confounders.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Of the 553 women eligible for analysis, those who delivered during (PR 0.69, 95% confidence interval [CI] 0.47\u20130.99) and after (PR 0.62, 95% CI 0.42\u20130.90) the state of emergency were less likely to have experienced either threatened abortion, threatened premature labor, or preterm birth than those who delivered before the state of emergency. Among the adjustment variables, smoking at the time of survey (PR 1.68, 95% CI 1.01\u20132.80) and living in the prefectures with a population of &gt;5 million (PR 0.71, 95% CI 0.51\u20130.97) were associated with the study outcome.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Threatened abortion, threatened premature labor, or preterm birth appeared to decrease during and after the first state of emergency in 2020. The longitudinal effects of coronavirus disease on maternal and newborn health should be monitored continuously.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jog.15203","type":"journal-article","created":{"date-parts":[[2022,2,26]],"date-time":"2022-02-26T04:53:17Z","timestamp":1645851197000},"page":"1116-1125","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Threatened abortion, threatened premature labor, and preterm birth during the first state of emergency for <scp>COVID<\/scp>\u201019 in 2020 in Japan"],"prefix":"10.1111","volume":"48","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2197-7078","authenticated-orcid":false,"given":"Sumiyo","family":"Okawa","sequence":"first","affiliation":[{"name":"Institute for Global Health Policy Research, Bureau of International Health Cooperation National Center for Global Health and Medicine  Tokyo Japan"},{"name":"Cancer Control Center Osaka International Cancer Institute  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiko","family":"Hosokawa","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynecology, Faculty of Medicine University of Tsukuba  Ibaraki Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Keiko","family":"Nanishi","sequence":"additional","affiliation":[{"name":"Office of International Academic Affairs, Graduate School of Medicine and Faculty of Medicine The University of Tokyo  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masayoshi","family":"Zaitsu","sequence":"additional","affiliation":[{"name":"Department of Public Health, School of Medicine Dokkyo Medical University  Tochigi Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takahiro","family":"Tabuchi","sequence":"additional","affiliation":[{"name":"Cancer Control Center Osaka International Cancer Institute  Osaka Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,2,25]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmj.m3320"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/ijgo.13182"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2214-109X(20)30345-4"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/ijgo.13457"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph17186766"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.appet.2020.104985"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.3389\/fpsyg.2020.617001"},{"key":"e_1_2_9_9_1","first-page":"1","article-title":"COVID\u201019 pandemic and maternal mental health: a systematic review and meta\u2010analysis","author":"Hessami K","year":"2020","journal-title":"J Matern Fetal Neonatal Med"},{"issue":"22","key":"e_1_2_9_10_1","first-page":"467","article-title":"Lockdown with a Price: the impact of the COVID\u201019 pandemic on prenatal care and perinatal outcomes in a tertiary care center","volume":"9","author":"Justman N","year":"2020","journal-title":"Isr Med Assoc J"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.diabet.2020.09.008"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1136\/archdischild-2020-319990"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/S2468-2667(20)30223-1"},{"key":"e_1_2_9_14_1","doi-asserted-by":"publisher","DOI":"10.1136\/bmjgh-2020-003075"},{"key":"e_1_2_9_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10995-010-0645-0"},{"key":"e_1_2_9_16_1","doi-asserted-by":"publisher","DOI":"10.1111\/ajo.12797"},{"key":"e_1_2_9_17_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0246670"},{"key":"e_1_2_9_18_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2006.01120.x"},{"key":"e_1_2_9_19_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(08)60074-4"},{"key":"e_1_2_9_20_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jnn.2020.11.004"},{"key":"e_1_2_9_21_1","doi-asserted-by":"publisher","DOI":"10.3418\/jjam.JJAM-2018-0049"},{"key":"e_1_2_9_22_1","unstructured":"Cabinet Secretariat Government of JapanReport on the implementation of the declaration of the state of emergency for the novel corona virus infectious disease. 2020: [cited 26 Aug 2021]. Available from:https:\/\/corona.go.jp\/news\/pdf\/kinkyujitaisengen_houkoku0604.pdf."},{"key":"e_1_2_9_23_1","unstructured":"The World Health OrganizationCoronavirus disease (COVID\u201019) Situation Report \u201478. 2020: [cited 26 Aug 2021]. Available from:https:\/\/www.who.int\/docs\/default-source\/coronaviruse\/situation-reports\/20200407-sitrep-78-covid-19.pdf."},{"key":"e_1_2_9_24_1","unstructured":"The Ministry of Health Labour and WelfareTo working pregnant women and employers: maternal health management measures for the novel corona virus infectious disease. 2021: [cited 2021 Aug 25]. Available from:https:\/\/www.mhlw.go.jp\/content\/11900000\/000628248.pdf."},{"key":"e_1_2_9_25_1","unstructured":"Japan Society of Obstetrics and GynecologyNotification to pregnant women. 2020: [cited 2021 Aug 25]. Available from:http:\/\/www.jsog.or.jp\/uploads\/files\/news\/20200407_COVID19.pdf."},{"key":"e_1_2_9_26_1","doi-asserted-by":"publisher","DOI":"10.1186\/s12884-021-04113-9"},{"key":"e_1_2_9_27_1","doi-asserted-by":"publisher","DOI":"10.1136\/archdischild-2020-320521"},{"key":"e_1_2_9_28_1","unstructured":"Rakuten Insight Inc. Domestic panels: [cited 2022 Feb 19]. Available from:https:\/\/insight.rakuten.co.jp\/member\/."},{"key":"e_1_2_9_29_1","unstructured":"The National Statistics Centere\u2010Stat: population and population index. 2020: [cited 2021 Feb 6]. Available from:https:\/\/www.e-stat.go.jp\/dbview?sid=0003411191."},{"key":"e_1_2_9_30_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1471-0528.2010.02801.x"},{"key":"e_1_2_9_31_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10654-016-0176-0"},{"key":"e_1_2_9_32_1","doi-asserted-by":"publisher","DOI":"10.1097\/EDE.0000000000000036"},{"key":"e_1_2_9_33_1","doi-asserted-by":"publisher","DOI":"10.1111\/1471-0528.14672"},{"key":"e_1_2_9_34_1","unstructured":"The National Statistics Centere\u2010Stat: area dimension and population density: whole country and prefectures. 2020: [cited 2021 Aug 25] Available from:https:\/\/www.e-stat.go.jp\/dbview?sid=0003411212."},{"key":"e_1_2_9_35_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.0001-6349.2005.00848.x"},{"key":"e_1_2_9_36_1","doi-asserted-by":"publisher","DOI":"10.1001\/jamanetworkopen.2019.2514"}],"container-title":["Journal of Obstetrics and Gynaecology Research"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/jog.15203","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/jog.15203","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/jog.15203","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,8,24]],"date-time":"2023-08-24T01:26:44Z","timestamp":1692840404000},"score":1,"resource":{"primary":{"URL":"https:\/\/obgyn.onlinelibrary.wiley.com\/doi\/10.1111\/jog.15203"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,2,25]]},"references-count":35,"journal-issue":{"issue":"5","published-print":{"date-parts":[[2022,5]]}},"alternative-id":["10.1111\/jog.15203"],"URL":"https:\/\/doi.org\/10.1111\/jog.15203","archive":["Portico"],"relation":{},"ISSN":["1341-8076","1447-0756"],"issn-type":[{"value":"1341-8076","type":"print"},{"value":"1447-0756","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,2,25]]},"assertion":[{"value":"2021-09-13","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2022-02-11","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2022-02-25","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}