Evidence map›Paper›PMID 40133830›Full record

ArticleBMC pregnancy and childbirth2025

Association of pre-pregnancy body mass index and gestational weight gain with continued breastfeeding until 6 months postpartum in Japanese women: the Japan Environment and Children's Study.

Hidekuni Inadera, Kenta Matsumura, Takashi Yoda, Takashi Nakano, Haruka Kasamatsu, Kanako Shimada, Akiko Tsuchida, Japan Environment and Children’s Study Group

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In one paragraph

Article in BMC pregnancy and childbirth, 2025. 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

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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

8 authors.

Hidekuni InaderaDepartment of Public Health, Faculty of Medicine, University of Toyama, Toyama, Japan. inadera@med.u-toyama.ac.jp.
Kenta MatsumuraDepartment of Public Health, Faculty of Medicine, University of Toyama, Toyama, Japan.
Takashi YodaEdogawa Chuo Kids Clinic, Tokyo, Japan.
Takashi NakanoToyama City Medical Association Health Care Center, Toyama, Japan.
Haruka KasamatsuToyama Regional Center for JECS, University of Toyama, Toyama, Japan.
Kanako ShimadaToyama Regional Center for JECS, University of Toyama, Toyama, Japan.
Akiko TsuchidaDepartment of Public Health, Faculty of Medicine, University of Toyama, Toyama, Japan.
Japan Environment and Children’s Study Group

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe relationship of pre-pregnancy body mass index (BMI) and gestational weight gain (GWG) with continued breastfeeding (BF) in Japanese women remains unclear. To evaluate different maternal pre-pregnancy BMI and GWG categories according to the initial BMI, we conducted an analysis of continued BF until 6 months postpartum in a large Japanese cohort.

methodsThis study used data from the Japan Environment and Children's Study, which included approximately 100,000 pregnant women. Pre-pregnancy BMI (kg/m

resultsOf 82,129 women with singleton pregnancies, BMI was categorized as underweight in 16.6%, normal weight in 75.3%, and overweight in 8.1%. The rate of EBF in these groups was 37.1% for underweight, 37.2% for normal weight, and 26.8% for overweight. In underweight women, both insufficient and excessive GWG were associated with higher rates of non-EBF type-II. In normal-weight women, insufficient and excessive GWG were associated with higher rates of non-EBF type-II. Overweight women showed higher rates of non-EBF type-I and type-II, irrespective of GWG.

conclusionsOur results indicate that the effects of GWG on continued BF were associated with pre-pregnancy BMI. Adequate GWG should be recommended to underweight and normal-weight women to promote BF. Efforts toward the prevention of overweight prior to pregnancy should be encouraged to enhance BF.

Indexed as

Body Mass IndexBreast FeedingGestational Weight GainAdultCohort StudiesEast Asian PeopleFemaleHumansJapanOverweightPostpartum PeriodPregnancyThinnessBreastfeedingGestational weight gainOverweightPre-pregnancy body mass indexUnderweight

Identifiers

PMID40133830
PMCPMC11934526

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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.