Evidence map›Paper›PMID 26795494›Full record

ArticlePloS one2016

Association between Maternal Smoking during Pregnancy and Low Birthweight: Effects by Maternal Age.

Wei Zheng, Kohta Suzuki, Taichiro Tanaka, Moriyasu Kohama, Zentaro Yamagata, Okinawa Child Health Study Group

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 3 pooled it
3.1field-weighted citation impact, top 9% of its field
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

26 citing papers in PubMed, 3 syntheses or guidelines pooled it, 60 citations in OpenAlex.

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  15. Experimental and therapeutic medicine · 2021
    Article
  16. Observational
  17. The Interplay between Maternal Smoking and Genes in Offspring Birth Weight.medRxiv : the preprint server for health sciences · 2020
    Article
  18. Smoking cessation in early-pregnancy, gestational weight gain and subsequent risks of pregnancy complications.European journal of obstetrics, gynecology, and reproductive biology · 2020
    Article
  19. Epidemiological determinants of low birth weight: A prospective study.Journal of family medicine and primary care · 2020
    Article
  20. 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

6 authors at 3 institutions in 2 countries.

Wei ZhengDepartment of Social Medicine and Health Education, School of Public Health, Peking University Health Science Center, Beijing, China.
Kohta SuzukiDepartment of Health Sciences, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan.
Taichiro TanakaDepartment of Social Medicine, Faculty of Medicine, Toho University, 5-21-16 Ohmorinisi, Ohta Ward, Tokyo, Japan.
Moriyasu KohamaDepartment of Pediatrics, Okinawa Prefectural Chubu Hospital, Okinawa, Okinawa, Japan.
Zentaro YamagataDepartment of Health Sciences, Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Chuo, Yamanashi, Japan.
Okinawa Child Health Study Group
University of Yamanashi · JPOkinawa Prefectural Chubu Hospital · JPToho University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundMaternal smoking during pregnancy has been consistently related to low birthweight. However, older mothers, who are already at risk of giving birth to low birthweight infants, might be even more susceptible to the effects of maternal smoking. Therefore, this study aimed to examine the modified association between maternal smoking and low birthweight by maternal age.

methodsData were obtained from a questionnaire survey of all mothers of children born between 2004 and 2010 in Okinawa, Japan who underwent medical check-ups at age 3 months. Variables assessed were maternal smoking during pregnancy, maternal age, gestational age, parity, birth year, and complications during pregnancy. Stratified analyses were performed using a logistic regression model.

resultsIn total, 92641 participants provided complete information on all variables. Over the 7 years studied, the proportion of mothers smoking during pregnancy decreased from 10.6% to 5.0%, while the prevalence of low birthweight did not change remarkably (around 10%). Maternal smoking was significantly associated with low birthweight in all age groups. The strength of the association increased with maternal age, both in crude and adjusted models.

conclusionsConsistent with previous studies conducted in Western countries, this study demonstrates that maternal age has a modifying effect on the association between maternal smoking and birthweight. This finding suggests that specific education and health care programs for older smoking mothers are important to improve their foetal growth.

Indexed as

AdultFemaleGestational AgeHumansInfant, Low Birth WeightInfant, NewbornLogistic ModelsMaternal AgeMothersParityPregnancySmokingYoung Adult

Identifiers

PMID26795494
PMCPMC4721610
OpenAlexW2405971041

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.