The reproducibility of measuring the anorectal angle in defecography

Stephen L. Ferrante, Richard E. Perry, Judith S. Schreiman, Shih-Chuan Cheng, Mathis P. Frick

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Dynamic proctography is a radiographic procedure that has become widely used in the evaluation of pelvic floor function. The anorectal angle (ARA) is one parameter which is usually quantified during this examination. To determine the accuracy with which this measurement can be made, three physicians independently measured the resting and squeezing ARAs of 22 women. The coefficient of variation and the kappa statistic were used to describe the degree of agreement among the three examiners. These analyses revealed poor agreement among examiners for all 22 patients taken as individuals, (κ{script}≤0.40; mean coefficient of variation at rest=18 percent; mean coefficient during squeezing=21 percent). These results suggest that measurements of ARAs will vary among examiners for any particular patient, even though individual examiners may demonstrate consistency in recording ARA data. There is wide interobserver variation in the measurement of the ARA from lateral radiographs, making quantification an exercise of only limited clinical value.

Original languageEnglish (US)
Pages (from-to)51-55
Number of pages5
JournalDiseases of the Colon & Rectum
Volume34
Issue number1
DOIs
StatePublished - Jan 1991

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Defecography
Pelvic Floor
Observer Variation
Exercise
Physicians

All Science Journal Classification (ASJC) codes

  • Gastroenterology

Cite this

The reproducibility of measuring the anorectal angle in defecography. / Ferrante, Stephen L.; Perry, Richard E.; Schreiman, Judith S.; Cheng, Shih-Chuan; Frick, Mathis P.

In: Diseases of the Colon & Rectum, Vol. 34, No. 1, 01.1991, p. 51-55.

Research output: Contribution to journalArticle

Ferrante, Stephen L. ; Perry, Richard E. ; Schreiman, Judith S. ; Cheng, Shih-Chuan ; Frick, Mathis P. / The reproducibility of measuring the anorectal angle in defecography. In: Diseases of the Colon & Rectum. 1991 ; Vol. 34, No. 1. pp. 51-55.
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