Evidence map›Paper›PMID 21122153›Full record

ArticleBMC pregnancy and childbirth2010

Effects of caesarean section on maternal health in low risk nulliparous women: a prospective matched cohort study in Shanghai, China.

Bing-shun Wang, Li-feng Zhou, David Coulter, Hong Liang, Ye Zhong, Yu-na Guo, Li-ping Zhu, Xiao-ling Gao, Wei Yuan, Er-sheng Gao

Abstract read
In one paragraph

Article in BMC pregnancy and childbirth, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 5 pooled it
–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

21 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Pooled it
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  10. Fentanyl for labour pain management: a scoping review.BMC pregnancy and childbirth · 2022
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  20. Preference for institutional delivery and caesarean sections in Bangladesh.Journal of health, population, and nutrition · 2013
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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

10 authors.

Bing-shun WangDepartment of Biostatistics, Shanghai Jiao Tong University School of Medicine, 227 South Chongqing Road, Shanghai 200025, PR China. wangbingshun@sjtu.edu.cn
Li-feng Zhou
David Coulter
Hong Liang
Ye Zhong
Yu-na Guo
Li-ping Zhu
Xiao-ling Gao
Wei Yuan
Er-sheng Gao

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundRates of caesarean section are progressively increasing in many parts of the world. As a result of psychosocial factors there has been an increasing tendency for pregnant women without justifiable medical indications for caesarean section to ask for this procedure in China. A critical examination of this issue in relation to maternal outcomes is important. At present there are no clinical trials to help assess the risks and benefits of caesarean section in low risk women. To fill the gap left by trials, this indication-matched cohort study was carried out to examine prospectively the outcomes of caesarean section on women with no absolute obstetric indication compared with similar women who had vaginal delivery.

methodsAn indication-matched cohort study was undertaken to compare maternal outcomes following caesarean section with those undergoing vaginal delivery, in which the two groups were matched for non-absolute indications. 301 nulliparous women with caesarean section were matched successfully with 301 women who delivered vaginally in the Maternal and Children's Hospitals (MCHs) in Shanghai, China. Logistic regression model or binomial regression model was used to estimate the relative risk (RR) directly. Adjusted RRs were calculated adjusting for propensity score and medical indications.

resultsThe incidence of total complications was 2.2 times higher in the caesarean section group during hospitalization post-partum, compared with the vaginal delivery group (RR = 2.2; 95% CI: 1.1-4.4). The risk of haemorrhage from the start of labour until 2 hours post-partum was significantly higher in the caesarean group (RR = 5.6; 95% CI: 1.2-26.9). The risk of chronic abdominal pain was significantly higher for the caesarean section group (RR = 3.6; 95% CI: 1.2-10.9) than for the vaginal delivery group within 12 months post-partum. The two groups had similar incidences of anaemia and complicating infections such as wound complications or urinary tract infection.

conclusionsIn nulliparous women who were at low risk, caesarean section was associated with a higher rate of post-partum morbidity. Those requesting the surgical procedure with no conventional medical indication, should be advised of the potential risks.

Indexed as

Labor, ObstetricAbdominal PainAdultCase-Control StudiesCesarean SectionChinaChronic DiseaseElective Surgical ProceduresFemaleHumansLogistic ModelsOdds RatioParityPostpartum HemorrhagePregnancyProspective Studies

Identifiers

PMID21122153
PMCPMC3014869

What OpenQuestion holds

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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.