Evidence map›Paper›PMID 33711947›Full record

ArticleBMC pregnancy and childbirth2021

Association between maternal outdoor physical exercise and the risk of preterm birth: a case-control study in Wuhan, China.

Miao Cai, Bin Zhang, Rong Yang, Tongzhang Zheng, Guanghui Dong, Hualiang Lin, Steven E Rigdon, Hong Xian, Leslie Hinyard, Pamela K Xaverius and 6 more

Abstract read
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Article in BMC pregnancy and childbirth, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing 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

7 citing papers in PubMed.

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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

16 authors.

Miao CaiDepartment of Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Yuexiu District, Guangzhou, 510080, China.
Bin ZhangWuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, 100 Xianggang Road, Jiangan District, Wuhan, 430015, China.
Rong YangWuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, 100 Xianggang Road, Jiangan District, Wuhan, 430015, China.
Tongzhang ZhengDepartment of Epidemiology Brown School of Public Health, 121 S Main St, Providence, RI, 02903, USA.
Guanghui DongDepartment of Toxicology, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Yuexiu District, Guangzhou, 510080, China.
Hualiang LinDepartment of Epidemiology, School of Public Health, Sun Yat-sen University, 74 Zhongshan 2nd Road, Yuexiu District, Guangzhou, 510080, China.
Steven E RigdonDepartment of Epidemiology and Biostatistics, College for Public Health & Social Justice, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Hong XianDepartment of Epidemiology and Biostatistics, College for Public Health & Social Justice, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Leslie HinyardCenter for Health Outcomes Research, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Pamela K XaveriusDepartment of Epidemiology and Biostatistics, College for Public Health & Social Justice, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Echu LiuDepartment of Health Management and Policy, College for Public Health and Social Justice, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Thomas E BurroughsCenter for Health Outcomes Research, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Daire R JanssonDepartment of Epidemiology and Biostatistics, College for Public Health & Social Justice, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Morgan H LeBaigeDepartment of Epidemiology and Biostatistics, College for Public Health & Social Justice, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA.
Shaoping YangWuhan Children's Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science & Technology, 100 Xianggang Road, Jiangan District, Wuhan, 430015, China. 1464502946@qq.com.
Zhengmin QianDepartment of Epidemiology and Biostatistics, College for Public Health & Social Justice, Saint Louis University, 3545 Lafayette Avenue, Saint Louis, MO, 63104, USA. zhengmin.qian@slu.edu.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundChina had the second largest proportion of preterm birth (PTB) internationally. However, only 11% of pregnant women in China meet international guidelines for maternal physical activity, a significantly lower proportion than that in Western countries. This study aims to examine the association between outdoor physical exercise during pregnancy and PTB among Chinese women in Wuhan, China.

methodsA case-control study was conducted among 6656 pregnant women (2393 cases and 4263 controls) in Wuhan, China from June 2011 to June 2013. Self-reported measures of maternal physical exercise (frequency per week and per day in minutes) were collected. Adjusted odds ratios were estimated using Bayesian hierarchical logistic regression and a generalized additive mixed model (GAMM).

resultsCompared to women not involved in any physical activity, those who participated in physical exercise 1-2 times, 3-4 times, and over five times per week had 20% (aOR: 0.80, 95% credible interval [95% CI]: 0.68-0.92), 30% (aOR: 0.70, 95% CI: 0.60-0.82), and 32% (aOR: 0.68, 95% CI: 0.59-0.78) lower odds of PTB, respectively. The Bayesian GAMM showed that increasing physical exercise per day was associated with lower risk of PTB when exercise was less than 150 min per day; however, this direction of association is reversed when physical exercise was more than 150 min per day.

conclusionMaternal physical exercise, at a moderate amount and intensity, is associated with lower PTB risk. More data from pregnant women with high participation in physical exercise are needed to confirm the reported U-shape association between the physical exercise and risk of preterm birth.

Indexed as

ExercisePremature BirthAdultBayes TheoremCase-Control StudiesChinaFemaleHumansPatient Reported Outcome MeasuresPhysical FitnessPregnancyPregnant PeopleRisk AssessmentRisk FactorsRisk Reduction BehaviorBayesianNonlinearPhysical exercisePregnancyPreterm birthWuhan

Identifiers

PMID33711947
PMCPMC7955628

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