Accuracy and intraobserver variability of simulated cervical dilatation measurements

John Phelps, Kenneth Higby, Michael H. Smyth, John A. Ward, Francisco Arredondo, Allan R. Mayer

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

OBJECTIVE: Our purpose was to assess the accuracy and intraobserver variability of clinical cervical diameter measurements among obstetric health care providers. STUDY DESIGN: Polyvinyl chloride pipes 1 to 10 cm in diameter were mounted in cardboard boxes and used to simulate cervical examinations. The boxes were designed so that the examiner had to rely solely on proprioception to determine the inner diameter. RESULTS: A total of 1574 simulated cervical diameter measurements were obtained from 102 different examiners in a two-part study. The overall accuracy for determining the exact diameter was 56.3%, which improved to 89.5% when an error of ±1 cm was allowed. Intraobserver variability for a given diameter measurement was 52.1%, which decreased to 10.5% when an error of ±1 cm was allowed. CONCLUSIONS: Cervical diameter measurements obtained by digital examination are precise when an error of ±1 cm is allowed for. Intraobserver variability is >50% and is an important consideration when evaluating dysfunctional labor.

Original languageEnglish (US)
Pages (from-to)942-945
Number of pages4
JournalAmerican Journal of Obstetrics and Gynecology
Volume173
Issue number3 PART 1
DOIs
StatePublished - 1995
Externally publishedYes

Fingerprint

First Labor Stage
Observer Variation
Proprioception
Polyvinyl Chloride
Health Personnel
Obstetrics

Keywords

  • Cervical dilatation
  • cervical measurements
  • labor

ASJC Scopus subject areas

  • Obstetrics and Gynecology
  • Medicine(all)

Cite this

Phelps, J., Higby, K., Smyth, M. H., Ward, J. A., Arredondo, F., & Mayer, A. R. (1995). Accuracy and intraobserver variability of simulated cervical dilatation measurements. American Journal of Obstetrics and Gynecology, 173(3 PART 1), 942-945. https://doi.org/10.1016/0002-9378(95)90371-2

Accuracy and intraobserver variability of simulated cervical dilatation measurements. / Phelps, John; Higby, Kenneth; Smyth, Michael H.; Ward, John A.; Arredondo, Francisco; Mayer, Allan R.

In: American Journal of Obstetrics and Gynecology, Vol. 173, No. 3 PART 1, 1995, p. 942-945.

Research output: Contribution to journalArticle

Phelps, J, Higby, K, Smyth, MH, Ward, JA, Arredondo, F & Mayer, AR 1995, 'Accuracy and intraobserver variability of simulated cervical dilatation measurements', American Journal of Obstetrics and Gynecology, vol. 173, no. 3 PART 1, pp. 942-945. https://doi.org/10.1016/0002-9378(95)90371-2
Phelps, John ; Higby, Kenneth ; Smyth, Michael H. ; Ward, John A. ; Arredondo, Francisco ; Mayer, Allan R. / Accuracy and intraobserver variability of simulated cervical dilatation measurements. In: American Journal of Obstetrics and Gynecology. 1995 ; Vol. 173, No. 3 PART 1. pp. 942-945.
@article{b6387367bdd840cfaea329b90d8e7f1c,
title = "Accuracy and intraobserver variability of simulated cervical dilatation measurements",
abstract = "OBJECTIVE: Our purpose was to assess the accuracy and intraobserver variability of clinical cervical diameter measurements among obstetric health care providers. STUDY DESIGN: Polyvinyl chloride pipes 1 to 10 cm in diameter were mounted in cardboard boxes and used to simulate cervical examinations. The boxes were designed so that the examiner had to rely solely on proprioception to determine the inner diameter. RESULTS: A total of 1574 simulated cervical diameter measurements were obtained from 102 different examiners in a two-part study. The overall accuracy for determining the exact diameter was 56.3{\%}, which improved to 89.5{\%} when an error of ±1 cm was allowed. Intraobserver variability for a given diameter measurement was 52.1{\%}, which decreased to 10.5{\%} when an error of ±1 cm was allowed. CONCLUSIONS: Cervical diameter measurements obtained by digital examination are precise when an error of ±1 cm is allowed for. Intraobserver variability is >50{\%} and is an important consideration when evaluating dysfunctional labor.",
keywords = "Cervical dilatation, cervical measurements, labor",
author = "John Phelps and Kenneth Higby and Smyth, {Michael H.} and Ward, {John A.} and Francisco Arredondo and Mayer, {Allan R.}",
year = "1995",
doi = "10.1016/0002-9378(95)90371-2",
language = "English (US)",
volume = "173",
pages = "942--945",
journal = "American Journal of Obstetrics and Gynecology",
issn = "0002-9378",
publisher = "Mosby Inc.",
number = "3 PART 1",

}

TY - JOUR

T1 - Accuracy and intraobserver variability of simulated cervical dilatation measurements

AU - Phelps, John

AU - Higby, Kenneth

AU - Smyth, Michael H.

AU - Ward, John A.

AU - Arredondo, Francisco

AU - Mayer, Allan R.

PY - 1995

Y1 - 1995

N2 - OBJECTIVE: Our purpose was to assess the accuracy and intraobserver variability of clinical cervical diameter measurements among obstetric health care providers. STUDY DESIGN: Polyvinyl chloride pipes 1 to 10 cm in diameter were mounted in cardboard boxes and used to simulate cervical examinations. The boxes were designed so that the examiner had to rely solely on proprioception to determine the inner diameter. RESULTS: A total of 1574 simulated cervical diameter measurements were obtained from 102 different examiners in a two-part study. The overall accuracy for determining the exact diameter was 56.3%, which improved to 89.5% when an error of ±1 cm was allowed. Intraobserver variability for a given diameter measurement was 52.1%, which decreased to 10.5% when an error of ±1 cm was allowed. CONCLUSIONS: Cervical diameter measurements obtained by digital examination are precise when an error of ±1 cm is allowed for. Intraobserver variability is >50% and is an important consideration when evaluating dysfunctional labor.

AB - OBJECTIVE: Our purpose was to assess the accuracy and intraobserver variability of clinical cervical diameter measurements among obstetric health care providers. STUDY DESIGN: Polyvinyl chloride pipes 1 to 10 cm in diameter were mounted in cardboard boxes and used to simulate cervical examinations. The boxes were designed so that the examiner had to rely solely on proprioception to determine the inner diameter. RESULTS: A total of 1574 simulated cervical diameter measurements were obtained from 102 different examiners in a two-part study. The overall accuracy for determining the exact diameter was 56.3%, which improved to 89.5% when an error of ±1 cm was allowed. Intraobserver variability for a given diameter measurement was 52.1%, which decreased to 10.5% when an error of ±1 cm was allowed. CONCLUSIONS: Cervical diameter measurements obtained by digital examination are precise when an error of ±1 cm is allowed for. Intraobserver variability is >50% and is an important consideration when evaluating dysfunctional labor.

KW - Cervical dilatation

KW - cervical measurements

KW - labor

UR - http://www.scopus.com/inward/record.url?scp=0029092243&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029092243&partnerID=8YFLogxK

U2 - 10.1016/0002-9378(95)90371-2

DO - 10.1016/0002-9378(95)90371-2

M3 - Article

C2 - 7573274

AN - SCOPUS:0029092243

VL - 173

SP - 942

EP - 945

JO - American Journal of Obstetrics and Gynecology

JF - American Journal of Obstetrics and Gynecology

SN - 0002-9378

IS - 3 PART 1

ER -