Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022
Objectives: Prior research has not yet examined the relationship between post-term birth and neonatal mortality in Japan, along with factors associated with post-term birth. We investigated these associations utilizing nationwide birth data from Japan. Methods: Birth and mortality data were obtained...
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Korean Society for Preventive Medicine
2024-11-01
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| Series: | Journal of Preventive Medicine and Public Health |
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| Online Access: | http://jpmph.org/upload/pdf/jpmph-24-355.pdf |
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| author | Tasuku Okui Naoki Nakashima |
| author_facet | Tasuku Okui Naoki Nakashima |
| author_sort | Tasuku Okui |
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| description | Objectives: Prior research has not yet examined the relationship between post-term birth and neonatal mortality in Japan, along with factors associated with post-term birth. We investigated these associations utilizing nationwide birth data from Japan. Methods: Birth and mortality data were obtained from the Vital Statistics of Japan for the years 2017 to 2022. The post-term birth rate was calculated by birth characteristics, and the neonatal mortality rates for post-term and term births were computed. Additionally, log-binomial regression analysis was employed to explore the associations between post-term birth and neonatal mortality, as well as between various characteristics and post-term birth. The characteristics considered included infant sex, maternal age group, parity, maternal nationality, maternal marital status, and household occupation. Results: This study analyzed data from 4 698 905 singleton infants born at 37 weeks of gestational age or later. Regression analysis revealed that post-term birth was positively associated with neonatal mortality. The adjusted risk ratio for neonatal mortality in post-term compared to term births was 8.07 (95% confidence interval, 5.06 to 12.86). Factors positively associated with post-term birth included female infant sex, older maternal age, primiparity, non-Japanese maternal nationality, unmarried status, and various household occupations, including farmer, full-time worker at a smaller company, other type of worker, and unemployed. Younger maternal age was inversely associated with post-term birth. Conclusions: In Japan, post-term birth represents a risk factor for neonatal mortality. Additionally, socio-demographic characteristics, such as maternal marital status, nationality, and parity were found to be predictors of post-term birth. |
| format | Article |
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| institution | OA Journals |
| issn | 1975-8375 2233-4521 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Korean Society for Preventive Medicine |
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| spelling | doaj-art-12857a924d17400da0740e4e427e79d92025-08-20T02:19:36ZengKorean Society for Preventive MedicineJournal of Preventive Medicine and Public Health1975-83752233-45212024-11-0157656457110.3961/jpmph.24.3552389Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022Tasuku OkuiNaoki Nakashima0 Medical Information Center, Kyushu University Hospital, Fukuoka, JapanObjectives: Prior research has not yet examined the relationship between post-term birth and neonatal mortality in Japan, along with factors associated with post-term birth. We investigated these associations utilizing nationwide birth data from Japan. Methods: Birth and mortality data were obtained from the Vital Statistics of Japan for the years 2017 to 2022. The post-term birth rate was calculated by birth characteristics, and the neonatal mortality rates for post-term and term births were computed. Additionally, log-binomial regression analysis was employed to explore the associations between post-term birth and neonatal mortality, as well as between various characteristics and post-term birth. The characteristics considered included infant sex, maternal age group, parity, maternal nationality, maternal marital status, and household occupation. Results: This study analyzed data from 4 698 905 singleton infants born at 37 weeks of gestational age or later. Regression analysis revealed that post-term birth was positively associated with neonatal mortality. The adjusted risk ratio for neonatal mortality in post-term compared to term births was 8.07 (95% confidence interval, 5.06 to 12.86). Factors positively associated with post-term birth included female infant sex, older maternal age, primiparity, non-Japanese maternal nationality, unmarried status, and various household occupations, including farmer, full-time worker at a smaller company, other type of worker, and unemployed. Younger maternal age was inversely associated with post-term birth. Conclusions: In Japan, post-term birth represents a risk factor for neonatal mortality. Additionally, socio-demographic characteristics, such as maternal marital status, nationality, and parity were found to be predictors of post-term birth.http://jpmph.org/upload/pdf/jpmph-24-355.pdfgestational ageinfant mortalityjapansociodemographic factorsvital statistics |
| spellingShingle | Tasuku Okui Naoki Nakashima Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022 Journal of Preventive Medicine and Public Health gestational age infant mortality japan sociodemographic factors vital statistics |
| title | Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022 |
| title_full | Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022 |
| title_fullStr | Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022 |
| title_full_unstemmed | Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022 |
| title_short | Factors Associated With Post-term Birth and Its Relationship to Neonatal Mortality in Japan: An Analysis of National Data From 2017 to 2022 |
| title_sort | factors associated with post term birth and its relationship to neonatal mortality in japan an analysis of national data from 2017 to 2022 |
| topic | gestational age infant mortality japan sociodemographic factors vital statistics |
| url | http://jpmph.org/upload/pdf/jpmph-24-355.pdf |
| work_keys_str_mv | AT tasukuokui factorsassociatedwithposttermbirthanditsrelationshiptoneonatalmortalityinjapanananalysisofnationaldatafrom2017to2022 AT naokinakashima factorsassociatedwithposttermbirthanditsrelationshiptoneonatalmortalityinjapanananalysisofnationaldatafrom2017to2022 |