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Related Experiment Videos

Interobserver agreement in defecography--an international study

S A Müller-Lissner1, D C Bartolo, J Christiansen

  • 1Department of Internal Medicine, Park-Klinik Weissensee, Berlin, Germany.

Zeitschrift Fur Gastroenterologie
|June 5, 1998
PubMed
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Defecography interobserver agreement for functional anorectal disorders is low, especially regarding treatment decisions. While image interpretation shows moderate agreement, its clinical utility remains questionable.

Area of Science:

  • Gastroenterology
  • Colorectal Surgery
  • Radiology

Background:

  • Defecography is a key diagnostic tool for functional anorectal disorders.
  • Previous studies have not assessed interobserver agreement across different institutions.

Purpose of the Study:

  • To evaluate the interobserver agreement among specialists in interpreting defecography findings.
  • To assess the reliability of defecography in diagnosing and guiding treatment for defecation disorders.

Main Methods:

  • 14 defecography studies (8 unequivocal, 6 controversial) were reviewed by 10 specialists (proctosurgeons, radiologists, gastroenterologists) from Europe and the US.
  • Participants used a standardized questionnaire to evaluate findings.
  • Interobserver agreement was measured using kappa statistics.

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Main Results:

  • Acceptable agreement (kappa > 0.4) was found for rectal emptying completeness and rectocele presence.
  • Agreement improved for image interpretation in unequivocal studies (kappa 0.43-0.63).
  • Treatment recommendations and the contribution of defecography to patient management showed very low agreement.

Conclusions:

  • Defecography interpretation shows variable agreement among specialists.
  • The clinical impact of defecography on patient management, particularly treatment decisions, is uncertain.