Evidence map›Paper›PMID 41689242›Full record

ArticleThe journal of obstetrics and gynaecology research2026

Associations Between Late-Night Shift Work and Perinatal Outcomes: A Nationwide Cross-Sectional Study Using JACSIS and JASTIS Data.

Yuya Tanaka, Yoshifumi Kasuga, Yoshihiko Hosokawa, Junko Tamai, Yuka Fukuma, Toshimitsu Otani, Marie Fukutake, Satoru Ikenoue, Takahiro Tabuchi, Mamoru Tanaka

Abstract read
In one paragraph

Article in The journal of obstetrics and gynaecology research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Yuya TanakaDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.ORCID https://orcid.org/0009-0009-9952-7673
Yoshifumi KasugaDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.ORCID https://orcid.org/0000-0003-2395-9591
Yoshihiko HosokawaDepartment of Obstetrics and Gynecology, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Miyazaki, Japan.
Junko TamaiDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.ORCID https://orcid.org/0009-0002-8974-6898
Yuka FukumaDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.
Toshimitsu OtaniDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.
Marie FukutakeDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.
Satoru IkenoueDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.
Takahiro TabuchiDivision of Epidemiology, School of Public Health, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
Mamoru TanakaDepartment of Obstetrics and Gynecology, Keio University School of Medicine, Shinjuku, Tokyo, Japan.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimThis study investigated associations between late-night shift work and perinatal outcomes.

methodsParticipants were pregnant women with recorded perinatal outcomes (late-night shift group, 626 cases; non-late-night shift group, 6633 cases) identified from two Japanese Internet surveys. We analyzed the association between late-night shift work and adverse perinatal outcomes. Furthermore, we examined factors associated with the use of Maternal Health Management and Guidance Cards.

resultsThe late-night shift group had significantly higher rates of threatened miscarriage, premature rupture of membranes (PROM), use of the Maternal Health Management and Guidance Card, health problems requiring hospitalization, fetal health problems, and infectious diseases compared with the non-late-night shift group. However, other perinatal outcomes, including preterm birth, gestational age at delivery, mode of delivery, and birth weight, did not differ significantly between groups. Among late-night shift-working mothers, those who used the Maternal Health Management and Guidance Card had a higher incidence of hyperemesis gravidarum, threatened miscarriage, and preterm labor than those who did not.

conclusionsLate-night shift work during pregnancy may be associated with an increased risk of perinatal complications. The Maternal Health Management and Guidance Card may provide support for pregnant women engaged in late-night shift work.

Indexed as

Pregnancy ComplicationsPregnancy OutcomeShift Work ScheduleWork Schedule ToleranceAbortion, ThreatenedAdultCross-Sectional StudiesFemaleHumansJapanPregnancyPremature Rupture of Fetal Membraneslate‐night shiftnationwide cross‐sectional studyperinatal outcomepregnancywork

Identifiers

PMID41689242
PMCPMC12905467

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.