Evidence map›Paper›PMID 36543795›Full record

ArticleScientific reports2022

Risk-factor model for postpartum hemorrhage after cesarean delivery: a retrospective study based on 3498 patients.

Jun Gong, Zhi Chen, Yi Zhang, Yi-Yun Liu, Jun-Cai Pu, Chun-Yan Xiong, Si-Wen Gui, Xiao-Ling He, Hui-Lai Wang, Xiao-Gang Zhong

Abstract read
In one paragraph

Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Prenatal predictors of severe maternal outcomes in placenta accreta spectrum: A multicenter cohort study in China.European journal of obstetrics & gynecology and reproductive biology: X · 2026
    Article
  3. Review
  4. Review
  5. Postpartum Hemorrhage: A Comprehensive Review of Medical and Surgical Treatment.Maternal-fetal medicine (Wolters Kluwer Health, Inc.) · 2026
    Review
  6. Article
  7. Feasibility and effectiveness of the novel HemoClear microfiltration cell-salvage system in cesarean sections in South Africa.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2026
    Article
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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.

Jun GongDepartment of Information Center, The University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China.
Zhi ChenDepartment of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
Yi ZhangSchool of Public Health and Management, Chongqing Medical University, Chongqing, 400016, China.
Yi-Yun LiuNHC Key Laboratory of Diagnosis and Treatment On Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
Jun-Cai PuNHC Key Laboratory of Diagnosis and Treatment On Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
Chun-Yan XiongDepartment of Obstetrics and Gynecology, The University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China.
Si-Wen GuiNHC Key Laboratory of Diagnosis and Treatment On Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
Xiao-Ling HeDepartment of Obstetrics and Gynecology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, China.
Hui-Lai WangDepartment of Information Center, The University-Town Hospital of Chongqing Medical University, Chongqing, 401331, China. 804225405@qq.com.
Xiao-Gang ZhongMedical Data Science Academy, Chongqing Medical University, Chongqing, 400016, China. zhongxiaogang@hospital.cqmu.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

This study aimed to investigate the risk factors of patients with postpartum hemorrhage (PPH) after cesarean delivery (CD) and to develop a risk-factor model for PPH after CD. Patients were selected from seven affiliated medical institutions of Chongqing Medical University from January 1st, 2015, to January 1st, 2020. Continuous and categorical variables were obtained from the hospital's electronic medical record systems. Independent risk factors were identified by univariate analysis, least absolute shrinkage and selection operator and logistic regression. Furthermore, logistic, extreme gradient boosting, random forest, classification and regression trees, as well as an artificial neural network, were used to build the risk-factor model. A total of 701 PPH cases after CD and 2797 cases of CD without PPH met the inclusion criteria. Univariate analysis screened 28 differential indices. Multi-variable analysis screened 10 risk factors, including placenta previa, gestational age, prothrombin time, thrombin time, fibrinogen, anemia before delivery, placenta accreta, uterine atony, placental abruption and pregnancy with uterine fibroids. Areas under the curve by random forest for the training and test sets were 0.957 and 0.893, respectively. The F1 scores in the random forest training and test sets were 0.708. In conclusion, the risk factors for PPH after CD were identified, and a relatively stable risk-factor model was built.

Indexed as

Abruptio PlacentaePostpartum HemorrhageCesarean SectionFemaleHumansPlacentaPregnancyRetrospective StudiesRisk Factors

Identifiers

PMID36543795
PMCPMC9772352

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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.