Evidence map›Paper›PMID 22543769›Full record

ArticleFemale pelvic medicine & reconstructive surgery

Perineal body length among different racial groups in the first stage of labor.

Pai-Jong Stacy Tsai, Ian A Oyama, Mark Hiraoka, Steven Minaglia, Jennifer Thomas, Bliss Kaneshiro

Open access · greenAbstract read
In one paragraph

Article in Female pelvic medicine & reconstructive surgery. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
0.9field-weighted citation impact, top 24% 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

15 citing papers in PubMed, 26 citations in OpenAlex.

  1. Obstetric trauma and its association with race and immigration: a population-based cohort study in Ontario, Canada.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2026
    Article
  2. Observational
  3. Review
  4. Article
  5. Article
  6. Article
  7. Review
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  9. Associations Between Maternal Obesity and Race, with Obstetric Anal Sphincter Injury: A Retrospective Cohort Study.Hawai'i journal of medicine & public health : a journal of Asia Pacific Medicine & Public Health · 2019
    Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Perineorrhaphy quantitative assessment (Pe-QA).International urogynecology journal · 2015
    Article
  15. Modeling manual perineal protection during vaginal delivery.International urogynecology journal · 2014
    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

6 authors at 1 institution in 1 country.

Pai-Jong Stacy TsaiDepartment of Obstetrics, Gynecology, and Women's Health, John A. Burns School of Medicine, University of Hawaii, 1319 Punahou St, Suite 824, Honolulu, HI 96826, USA. paijong@hawaii.edu
Ian A Oyama
Mark Hiraoka
Steven Minaglia
Jennifer Thomas
Bliss Kaneshiro
University of Hawaiʻi at Mānoa · US

Funding

WILLINGNESS OF PRIMARY CARE PHYSICIANS TO ADOPT HANDHELD COMPUTINGP20RR011091 · NCRR · UNIVERSITY OF HAWAII AT MANOA · PI ERDEM, GULIZ · 1995 to 2009
$16.5M
NCRR NIH HHS P20 RR011091
6 · The paper itself

Abstract

objectiveAnatomic differences among racial groups may contribute to observed differences in the occurrence of severe perineal lacerations at the time of vaginal delivery. The purpose of this study was to identify differences in perineal body length between racial groups.

methodsPerineal body length was measured in primigravid women aged 18 to 45 years who were admitted in labor. Women were classified into 1 of 6 racial groups: White, Filipino, Japanese, Chinese, Native Hawaiian, or Micronesian. The primary outcome, perineal body length, was compared using analysis of variance.

resultsA total of 200 women were recruited. There were no significant differences in perineal body length (P = 0.42) and severe perineal lacerations (P = 0.82) between the different racial groups. The mean (SD) perineal body length of women who had a severe laceration was 3.9 (0.5) versus 3.9 (0.6) cm in women who did not have a severe laceration (P= 0.98).

conclusionPerineal body length does not seem to differ among the different racial groups studied and therefore an unlikely cause of racial variation in rates of severe perineal lacerations.

Indexed as

Labor Stage, FirstRacial GroupsAdultDelivery, ObstetricEpisiotomyExtraction, ObstetricalFemaleHumansPerineumPregnancyProspective Studies

Identifiers

PMID22543769
PMCPMC5894868
OpenAlexW2023020699

What OpenQuestion holds

Textmetadata
LicenceTDM
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.