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Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, P.H.S.
Colonic biopsy practice for evaluation of diarrhea in patients with normal endoscopic findings: results from a national endoscopic database.
Gastrointestinal Endoscopy 2005 March
BACKGROUND: The colonic biopsy is the only reliable method for identification of microscopic colitis in patients with chronic diarrhea and normal endoscopic findings.
METHODS: The Clinical Outcomes Research Initiative national endoscopic database was analyzed to determine the rate at which colonic biopsy specimens were obtained in patients undergoing colonoscopy for the evaluation of diarrhea with no visible mucosal abnormality.
RESULTS: Between January 2000 and December 2003, 5565 unique adult patients underwent colonoscopy for evaluation of diarrhea without detection of any mucosal abnormality. Colonic mucosal biopsy specimens were obtained in 4410 (79.2%) of these patients. The rates at which biopsy specimens were obtained differed among the sites where colonoscopy was performed; biopsy specimens were obtained from more patients undergoing colonoscopy in university-affiliated settings (86.8%) compared with Veterans Affairs Medical Centers (VAMC) (78.5%) or community sites (78.6%) ( p < 0.001). On multivariate analysis, biopsy specimens were more likely to be obtained in younger patients (OR 0.7: 95%CI[0.6, 0.8] for age >50 years vs. <50 years), women patients (OR 1.4: 95% CI[1.2, 1.6] in community setting; OR 4.1: 95% CI[1.6, 10.5] in VAMC setting), and patients seen in university-affiliated medical centers (university center OR 2.1: 95% CI[1.5, 3.0] vs. community setting).
CONCLUSIONS: Biopsy specimens are obtained in four fifths of patients with diarrhea and normal colonoscopy findings to exclude microscopic colitis. Variation in biopsy practice exists among endoscopy site types and by gender. Clear guidelines are needed for the endoscopic approach to these patients.
METHODS: The Clinical Outcomes Research Initiative national endoscopic database was analyzed to determine the rate at which colonic biopsy specimens were obtained in patients undergoing colonoscopy for the evaluation of diarrhea with no visible mucosal abnormality.
RESULTS: Between January 2000 and December 2003, 5565 unique adult patients underwent colonoscopy for evaluation of diarrhea without detection of any mucosal abnormality. Colonic mucosal biopsy specimens were obtained in 4410 (79.2%) of these patients. The rates at which biopsy specimens were obtained differed among the sites where colonoscopy was performed; biopsy specimens were obtained from more patients undergoing colonoscopy in university-affiliated settings (86.8%) compared with Veterans Affairs Medical Centers (VAMC) (78.5%) or community sites (78.6%) ( p < 0.001). On multivariate analysis, biopsy specimens were more likely to be obtained in younger patients (OR 0.7: 95%CI[0.6, 0.8] for age >50 years vs. <50 years), women patients (OR 1.4: 95% CI[1.2, 1.6] in community setting; OR 4.1: 95% CI[1.6, 10.5] in VAMC setting), and patients seen in university-affiliated medical centers (university center OR 2.1: 95% CI[1.5, 3.0] vs. community setting).
CONCLUSIONS: Biopsy specimens are obtained in four fifths of patients with diarrhea and normal colonoscopy findings to exclude microscopic colitis. Variation in biopsy practice exists among endoscopy site types and by gender. Clear guidelines are needed for the endoscopic approach to these patients.
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