Evidence map›Paper›PMID 36167382›Full record

ArticleBMJ open2022

Impact of gestational hypertension and pre-eclampsia on preterm birth in China: a large prospective cohort study.

Hang An, Ming Jin, Zhiwen Li, Le Zhang, Hongtian Li, Yali Zhang, Rongwei Ye, Nan Li

Abstract read
In one paragraph

Article in BMJ open, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 2 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

37 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
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  3. Therapeutic Interventions for Preeclampsia: Integrating Placental and Maternal Perspectives.American journal of reproductive immunology (New York, N.Y. : 1989) · 2026
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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

8 authors.

Hang AnDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China.
Ming JinDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China.
Zhiwen LiDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China.ORCID 0000-0002-9029-7412
Le ZhangDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China.ORCID 0000-0001-7570-3809
Hongtian LiDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China.
Yali ZhangDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China.
Rongwei YeDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China linan01@pku.edu.cn yerw@bjmu.edu.cn.
Nan LiDepartment of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China linan01@pku.edu.cn yerw@bjmu.edu.cn.

Funding

CHINA-US COLLABORATIVE PROGRAM FOR MATERNAL-CHILD AND FAMILY HEALTHU01DD000293 · DD · PEKING UNIVERSITY HEALTH SCIENCE CENTER · PI CHENG-YOU, WEI · 2007 to 2011
$2.9M
NCBDD CDC HHS U01 DD000293
6 · The paper itself

Abstract

objectiveTo investigate the impact of gestational hypertension and pre-eclampsia on preterm birth.

designThe data were collected from the China-US Collaborative Project for Neural Tube Defect Prevention; this was a large population-based cohort study. SETTING AND

participantsWe selected participants registered in two southern provinces, for whom we had exact information on gestational blood pressure and pregnancy outcomes, and who were not affected by chronic hypertension. In total, 200 103 participants were recruited from 1993 to 1995. OUTCOME MEASURES: Preterm birth was defined as a singleton pregnancy and birth before 37 gestational weeks.

resultsThe incidences of gestational hypertension and pre-eclampsia were 5.47% and 5.44%, respectively, for women who gave birth at full term, and 5.63% and 7.33%, respectively, for those who gave birth preterm. After adjusting for potential confounders, the risk ratios (RRs) of preterm birth in women with gestational hypertension and pre-eclampsia were 1.04 (95% CI 0.98 to 1.11) and 1.39 (95% CI 1.25 to 1.55), respectively. The associations were stronger for early-onset (<28 weeks of gestation) gestational hypertension (adjusted RR=2.13, 95% CI 1.71 to 2.65) and pre-eclampsia (adjusted RR=8.47, 95% CI 5.59 to 12.80).

conclusionsPre-eclampsia was associated with a higher risk of preterm birth. The early-onset gestational hypertension and pre-eclampsia were associated with more severe risks than late-onset conditions.

Indexed as

HypertensionHypertension, Pregnancy-InducedPre-EclampsiaPremature BirthCohort StudiesFemaleHumansInfant, NewbornPregnancyProspective StudiesEPIDEMIOLOGYFetal medicineHypertensionOBSTETRICSPrenatal diagnosis

Identifiers

PMID36167382
PMCPMC9516080

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Registered trials

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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.