Evidence map›Paper›PMID 21612655›Full record

ArticleBMC pregnancy and childbirth2011

Temporal trends in neonatal outcomes following iatrogenic preterm delivery.

Sarka Lisonkova, Jennifer A Hutcheon, K S Joseph

Open access · goldAbstract read
In one paragraph

Article in BMC pregnancy and childbirth, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
6.2field-weighted citation impact, top 3% 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

25 citing papers in PubMed, 71 citations in OpenAlex.

  1. Neonatal Outcomes Following Preterm Birth Between 28 and 36 Weeks' Gestation in Vietnam: A Cohort Study.The Australian & New Zealand journal of obstetrics & gynaecology · 2026
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  2. Article
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  6. Iatrogenic and spontaneous preterm birth in England: A population-based cohort study.BJOG : an international journal of obstetrics and gynaecology · 2023
    Article
  7. Obstetrical and Newborn Outcomes Among Patients With SARS-CoV-2 During Pregnancy.Journal of obstetrics and gynaecology Canada : JOGC = Journal d'obstetrique et gynecologie du Canada : JOGC · 2021
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  13. Infant mortality in the United States.Journal of perinatology : official journal of the California Perinatal Association · 2016
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  18. Changes in delivery methods at specialty care hospitals in the United States between 2006 and 2010.Journal of perinatology : official journal of the California Perinatal Association · 2013
    Article
  19. Preterm birth time trends in Europe: a study of 19 countries.BJOG : an international journal of obstetrics and gynaecology · 2013
    Article
  20. Obstetrical interventions for term first deliveries in the US.Paediatric and perinatal epidemiology · 2013
    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

3 authors at 2 institutions in 1 country.

Sarka LisonkovaDepartment of Obstetrics & Gynaecology, University of British Columbia and the Women's Hospital and Health Centre of British Columbia, Vancouver, Canada. slisonkova@cfri.ca
Jennifer A Hutcheon
K S Joseph
B.C. Women's Hospital & Health Centre · CAUniversity of British Columbia · CA

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

backgroundPreterm birth rates have increased substantially in the recent years mostly due to obstetric intervention. We studied the effects of increasing iatrogenic preterm birth on temporal trends in perinatal mortality and serious neonatal morbidity in the United States.

methodsWe used data on singleton and twin births in the United States, 1995-2005 (n = 36,399,333), to examine trends in stillbirths, neonatal deaths, and serious neonatal morbidity (5-minute Apgar ≤3, assisted ventilation ≥30 min and neonatal seizures). Preterm birth subtypes were identified using an algorithm that categorized live births <37 weeks into iatrogenic preterm births, births following premature rupture of membranes and spontaneous preterm births. Temporal changes were quantified using odds ratios (OR) and 95% confidence intervals (CI).

resultsAmong singletons, preterm birth increased from 7.3 to 8.8 per 100 live births from 1995 to 2005, while iatrogenic preterm birth increased from 2.2 to 3.7 per 100 live births. Stillbirth rates declined from 3.4 to 3.0 per 1,000 total births from 1995-96 to 2004-05, and neonatal mortality rates declined from 2.4 to 2.1 per 1,000 live births. Temporal declines in neonatal mortality/morbidity were most pronounced at 34-36 weeks gestation and larger among iatrogenic preterm births (OR = 0.75, CI 0.73-0.77) than among spontaneous preterm births (OR = 0.82, CI 0.80-0.84); P < 0.001. Similar patterns were observed among twins, with some notable differences.

conclusionIncreases in iatrogenic preterm birth have been accompanied by declines in perinatal mortality. The temporal decline in neonatal mortality/serious neonatal morbidity has been larger among iatrogenic preterm births as compared with spontaneous preterm births.

Indexed as

AdultCesarean SectionFemaleGestational AgeHumansInfant MortalityInfant, NewbornInfant, Newborn, DiseasesInfant, PrematureLabor, InducedPregnancyPremature BirthPremature Rupture of Fetal MembranesStillbirthTwinsUnited States

Identifiers

PMID21612655
PMCPMC3130708
OpenAlexW2072513180

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.