Evidence map›Paper›PMID 32460822›Full record

ArticleBMC public health2020

How does the two-child policy affect the sex ratio at birth in China? A cross-sectional study.

S L Fan, C N Xiao, Y K Zhang, Y L Li, X L Wang, L Wang

Open access · goldAbstract read
In one paragraph

Article in BMC public health, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
8.2field-weighted citation impact, top 2% 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

24 citing papers in PubMed, 48 citations in OpenAlex.

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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

6 authors at 1 institution in 1 country.

S L FanHebei Women and Children's Health Center, Shijiazhuang, 050000, Hebei, China.
C N XiaoDepartment of Obstetrics and Gynecology, Hebei General Hospital, No. 348 Heping Road, Shijiazhuang, 050051, Hebei, China.
Y K ZhangHebei Women and Children's Health Center, Shijiazhuang, 050000, Hebei, China.
Y L LiHebei Women and Children's Health Center, Shijiazhuang, 050000, Hebei, China.
X L WangDepartment of Obstetrics and Gynecology, Hebei General Hospital, No. 348 Heping Road, Shijiazhuang, 050051, Hebei, China.
L WangDepartment of Obstetrics and Gynecology, Hebei General Hospital, No. 348 Heping Road, Shijiazhuang, 050051, Hebei, China. wangli719@126.com.ORCID http://orcid.org/0000-0002-2940-5461
Hebei General Hospital · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe One-Child Policy led to the imbalance of the sex ratio at birth (SRB) in China. After that, Two-Child Policy was introduced and gradually liberalized at three stages. If both the husband and wife of one couple were the only child of their parents, they were allowed to have two children in policy (BTCP). If only one of them was the only child, they were allowed to have two children in policy (OTCP). The Universal Two-Child Policy (UTCP) allowed every couple to have two children. The objective of this study was to explore the changing trend of SRB at the stages of Two-Child Policy, to analyze the effect of population policy on SRB in terms of maternal age, delivery mode, parity, maternal education, delivery hospital, and to figure out what factors have greater impact on the SRB.

methodsThe data of the study came from Hebei Province Maternal Near Miss Surveillance System, covered the parturients delivered at 28 gestation weeks or more in 22 hospitals from January 1, 2013 to December 31, 2017. We compared the SRB at different policy stages, analyzed the relationship between the SRB and population policy by logistic regression analysis.

resultsTotal 270,878 singleton deliveries were analyzed. The SRB, 1.084 at BTCP, 1.050 at OTCP, 1.047 at UTCP, declined rapidly (χ

conclusionsThe SRB has declined to normal level with the gradually liberalizing of Two-Child Policy in China. Advanced maternal age, cesarean delivery, multiparous women, middle level education, rural hospital are the main factors of effect on the decline of the SRB.

Indexed as

ParityAdultBirth RateCesarean SectionChinaCross-Sectional StudiesDelivery, ObstetricFemaleHumansInfantInfant MortalityInfant, NewbornMaleMaternal AgePregnancyPublic PolicyOne-child policyPopulation policySex ratio at birthTwo-child policy

Identifiers

PMID32460822
PMCPMC7251839
OpenAlexW3029290228

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

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.