Evidence map›Paper›PMID 29304810›Full record

ArticleInternational journal for equity in health2018

Socioeconomic status can affect pregnancy outcomes and complications, even with a universal healthcare system.

Min Kyoung Kim, Seung Mi Lee, Sung-Hee Bae, Hyun Joo Kim, Nam Gu Lim, Seok-Jun Yoon, Jin Yong Lee, Min-Woo Jo

Abstract read
In one paragraph

Article in International journal for equity in health, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 126 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
126citing papers in PubMed, 3 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

126 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Late-onset preeclampsia is characterized by accelerated placental aging.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  5. [Development and validation of a comprehensive evaluation index system for preconception health behaviors in reproduc-tive-aged populations].Zhejiang da xue xue bao. Yi xue ban = Journal of Zhejiang University. Medical sciences · 2026
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  7. Causal effects of reproductive traits on cognitive function: A two-sample and multivariable mendelian randomization study.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2026
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66 more citing papers are in PubMed but not listed here.

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.

Min Kyoung KimDepartment of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.
Seung Mi LeeDepartment of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Korea.
Sung-Hee BaePublic Health Medical Service, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
Hyun Joo KimDepartment of Nursing Science, Shinsung University, Dangjin, Korea.
Nam Gu LimDepartment of Medical Administration and Information, Daejeon Health Institute of Technology, Daejeon, Korea.
Seok-Jun YoonDepartment of Preventive Medicine, College of Medicine, Korea University, Seoul, Korea.
Jin Yong LeePublic Health Medical Service, Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea. jylee2000@gmail.com.ORCID 0000-0002-7752-2697
Min-Woo JoDepartment of Preventive Medicine, University of Ulsan College of Medicine, Seoul, Korea. mdjominwoo@gmail.com.

Funding

Ministry of Health and Welfare HI13C0729
6 · The paper itself

Abstract

backgroundLow socioeconomic status can increase the risk of adverse pregnancy outcomes, but it remains unclear whether this negative association is attributed to inadequate prenatal care. Korea has been adopting a universal healthcare system. All Korean citizens must be enrolled National Health Insurance (NHI) or be recipient of Medical Aid (MA). In addition, Korean government launched a financial support system for antenatal care for all pregnant women in 2008. Therefore, in theory, there is no financial barrier to receive prenatal cares regardless of someone's social class. However, it is still unclear whether adverse pregnancy outcomes observed in low-income women are attributable to low SES or to economic barriers specific to the utilization of medical services. The purpose of this study was to investigate whether socioeconomic status affects pregnancy outcomes after the introduction of this support system, which allows all pregnant women to receive adequate prenatal care regardless of socioeconomic status.

methodsUsing the National Health Insurance database in Korea, we selected women who gave birth between January 1, 2010 and December 31, 2010. As a proxy indicator reflecting socioeconomic status, we classified subjects as MA recipient ("low" SES) or a NHI beneficiary ("middle/high" SES).

resultsIn the MA group, 29.4% women received inadequate prenatal care, compared to 11.4% in the NHI group. Mothers in the MA group were more likely to have an abortion (30.1%), rather than deliver a baby, than those in the NHI group (20.7%, P < 0.001). Mothers in the MA group were also more likely to undergo a Caesarean delivery (45.8%; NHI group: 39.6%, P < 0.001), and have preeclampsia (1.5%; NHI group: 0.6%, P < 0.001), obstetric hemorrhage (4.7%; NHI group: 3.9%, P = 0.017), and a preterm delivery (2.1%; NHI group: 1.4%, P < 0.001) than those in the NHI group.

conclusionsWomen in the MA group tended to show higher rates of abortion, Caesarean delivery, preeclampsia, preterm delivery, and obstetrical hemorrhage than those in the NHI group Therefore, health authorities should consider investigating what kind of barriers exist or what factors may affect these inequitable outcomes.

Indexed as

AdultCesarean SectionFemaleHumansInfant, NewbornMaleMiddle AgedMothersNational Health ProgramsPovertyPregnancyPregnancy ComplicationsPregnancy OutcomePrenatal CareRepublic of KoreaSocial ClassHealth equityNational Health InsurancePrenatal carePreterm deliverySocioeconomic status

Identifiers

PMID29304810
PMCPMC5756361

What OpenQuestion holds

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LicenceCC BY
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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.