Evidence map›Paper›PMID 21088370›Full record

ArticleJournal of epidemiology2011

Smoking during pregnancy increases risks of various obstetric complications: a case-cohort study of the Japan Perinatal Registry Network database.

Kunihiko Hayashi, Yoshio Matsuda, Yayoi Kawamichi, Arihiro Shiozaki, Shigeru Saito

Abstract read
In one paragraph

Article in Journal of epidemiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
25citing 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

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

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Review
  6. Article
  7. Article
  8. Higher prevalence of hypertensive disorders of pregnancy in women who smoke: the Japan environment and children's study.Hypertension research : official journal of the Japanese Society of Hypertension · 2019
    Article
  9. Article
  10. Article
  11. Epidemiology of hypertensive disorders in pregnancy: prevalence, risk factors, predictors and prognosis.Hypertension research : official journal of the Japanese Society of Hypertension · 2017
    Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. The many faces of tobacco use among women.Medical science monitor : international medical journal of experimental and clinical research · 2014
    Review
  18. Article
  19. Smoking and pregnancy--a review on the first major environmental risk factor of the unborn.International journal of environmental research and public health · 2013
    Review
  20. Article
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

5 authors.

Kunihiko HayashiDepartment of Basic Medical Sciences, School of Health Sciences, Faculty of Medicine, Gunma University, Maebashi, Gunma, Japan. khayashi@health.gunma-u.ac.jp
Yoshio Matsuda
Yayoi Kawamichi
Arihiro Shiozaki
Shigeru Saito

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe adverse effects of maternal smoking on the health of pregnant women have been examined mostly on a disease-by-disease basis. The aims of this study were to evaluate simultaneously the effects of smoking during pregnancy on various obstetric complications, using data from a large medical database, and to investigate the expediency of using a case-cohort design for such an analysis.

methodsA case-cohort study was conducted within the Japan Perinatal Registry Network database. Perinatal information on infant deliveries was entered into the database at 125 medical centers in Japan. The base population of the study was 180 855 pregnant women registered in the database from 2001 through 2005. The outcome measures were the incidences of 11 different obstetric complications. Logistic regression models were used to estimate age-adjusted risk ratios (aRRs) and relative excess incidence proportions (REIs).

resultsThe overall prevalence of smoking during pregnancy was 5.8% in the base cohort, and the prevalence was higher among younger women. A comparison of the cases and control cohort showed that smokers during pregnancy had statistically significant higher risks for preterm rupture of the membrane (aRR: 1.67, 95% confidence interval [CI]: 1.43-1.96; REI: 40.2%, 95% CI: 29.9%-49.1%), chorioamnionitis (1.65, 1.36-2.00; 39.4%, 26.4%-50.0%), incompetent cervix (1.63, 1.35-1.96; 38.5%, 25.8%-49.1%), threatened premature delivery (1.38, 1.17-1.64; 27.7%, 14.5%-38.9%), placental abruption (1.37, 1.10-1.72; 27.1%, 8.8%-41.7%), and pregnancy-induced hypertension (1.20, 1.01-1.41; 16.4%, 1.2%-29.3%).

conclusionsMaternal smoking was associated with a number of obstetric complications. This highlights the importance of smoking cessation during pregnancy. In addition, case-cohort analysis proved useful in estimating RRs for multiple outcomes in a large database.

Indexed as

AdolescentAdultAge DistributionCohort StudiesDatabases, FactualFemaleHumansJapanObstetric Labor ComplicationsPregnancyRegistriesRiskSmokingYoung Adult

Identifiers

PMID21088370
PMCPMC3899518

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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.