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Sampling error and observer variation in the interpretation of esophageal biopsies
Digestion
|January 1, 1979
Summary
Observer variation and sampling errors limit the reliability of basal cell thickness and papillary height measurements for diagnosing gastroesophageal reflux disease (GERD). These histological markers show significant variability, even with simple normal/abnormal assessments.
Area of Science:
- Gastroenterology
- Pathology
- Histology
Background:
- Gastroesophageal reflux disease (GERD) diagnosis often relies on histological examination of esophageal tissue.
- Assessing histological changes for GERD requires reliable and reproducible methods.
Purpose of the Study:
- To evaluate observer variation and sampling error in histological assessments of GERD-related esophageal alterations.
- To determine the reliability of basal cell thickness and papillary height as diagnostic indices for GERD.
Main Methods:
- Analysis of esophageal autopsy specimens from 11 subjects.
- Assessment of inter- and intraobserver variation in histological readings.
- Comparison of measurements from different esophageal levels and the same level.
Main Results:
- Inter- and intraobserver variation exceeded 20% for normal/abnormal readings.
- Significant differences in basal cell thickness were observed between different esophageal levels.
- Papillary height showed less variation compared to basal cell thickness.
Conclusions:
- The reliability of basal cell thickness and papillary height as indices for GERD appears limited due to significant observer and sampling variability.
- Histological assessment of GERD may require refined methods to improve diagnostic accuracy.