Evidence map›Paper›PMID 42106537›Full record

ArticleCommunications medicine2026

Sedentary time during pregnancy and fetal malpresentation in the Japan Environment and Children's Study.

Kimiyo Kikuchi, Takehiro Michikawa, Seiichi Morokuma, Norio Hamada, Kiyoko Kato, Masayuki Ochiai, Mayumi Tsuji, Kiyoshi Yoshino, Reiko Suga, Toshihiro Kawamoto and 2 more

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Article in Communications medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
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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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

12 authors.

Kimiyo Kikuchi *Department of Research Promotion, Institute for Asian and Oceanian Studies, Kyushu University, Fukuoka, Japan.ORCID http://orcid.org/0000-0002-9397-4327
Takehiro Michikawa *Department of Environmental and Occupational Health, School of Medicine, Toho University, Tokyo, Japan.
Seiichi MorokumaDepartment of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. morokuma.seiichi.845@m.kyushu-u.ac.jp.ORCID http://orcid.org/0000-0001-5995-0017
Norio HamadaResearch Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.ORCID http://orcid.org/0000-0002-0906-8277
Kiyoko KatoResearch Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
Masayuki OchiaiResearch Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
Mayumi TsujiRegional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan.
Kiyoshi YoshinoRegional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan.
Reiko SugaRegional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan.ORCID http://orcid.org/0000-0002-8220-4941
Toshihiro KawamotoRegional Center for Japan Environment and Children's Study, University of Occupational and Environmental Health, Kitakyushu, Japan.ORCID http://orcid.org/0000-0002-1168-4271
Shouichi OhgaResearch Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan.
Japan Environment, Children’s Study Group

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFetal malpresentation, such as breech, transverse, and oblique presentations, is a frequent diagnosis in obstetrical practice. While several maternal factors have been studied, the potential relationship between maternal sedentary behavior and fetal malpresentation remains underexplored. This study aimed to examine the association between sedentary behavior during pregnancy and fetal malpresentation using data from a large longitudinal cohort study conducted in Japan.

methodsThis prospective longitudinal cohort study recruited approximately 100,000 pregnant women from 15 Regional Centers in Japan. Participants completed self-administered questionnaires in the first and either the second or third trimester of pregnancy. Sedentary behavior was defined as the number of hours spent sitting or lying down per day. The fetal presentation at delivery was recorded from medical records. Logistic regression analyses were conducted to estimate the odds ratio of the association between sedentary time and the likelihood of fetal malpresentation.

resultsHere we show that among 73,813 eligible participants, the mean maternal age is 31.3 years, 27.4% deliver at ≥35, 3.0% experience fetal malpresentation, and 48.7% have female infant. The median sedentary time is 5 hours (interquartile range: 3-8). Women who report ≥12 hours sedentary time per day have higher odds for fetal malpresentation compared to those reporting <6 hours (adjusted odds ratio: 1.17; 95% confidence interval: 1.02-1.35).

conclusionsThe findings emphasize the need to address sedentary behavior as a modifiable risk factor during pregnancy, which may implicate future interventions aimed at reducing the incidence of fetal malpresentation.

Identifiers

PMID42106537
PMCPMC13376198

What Socratic holds

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LicenceCC BY-NC-ND
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Registered trials

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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 Socratic graph.