The American Journal of Digestive Diseases

, Volume 18, Issue 4, pp 301–310 | Cite as

Discriminant analysis of data in ulcer and nonulcer populations

  • I. G. M. Cleator
  • J. L. Stoller
  • P. N. Nunn
  • I. B. Holubitsky
  • F. R. C. Johnstone
  • R. C. Harrison
Original Articles

Abstract

The purpose of this study was to assess whether consideration of age and body weight measurements improved discrimination between normal subjects and duodenal ulcer subjects using the maximal acid output test. Seventy-seven male volunteers were the “normal” group, and 155 patients with surgically proven duodenal ulcers were the “ulcer” group. We found that the ratio of maximal acid output to actual weight gave the best discrimination between the two groups. Using this ratio, there were 45 hypersecretors in the ulcer group, and only 1 false-positive among the normal subjects. A graphic method is described which employs the ratio of acid to weight and can correctly classify two-thirds of the ulcer group. The disadvantage of this method, however, is that one-third of the control group in our series were misclassified as hypersecretors; therefore, the clinician must consider history and barium meal findings as well as this evaluation of the subject.

Keywords

Public Health Body Weight Barium Discriminant Analysis Duodenal Ulcer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Medical Department Harper & Row, Publishers, Inc. 1973

Authors and Affiliations

  • I. G. M. Cleator
    • 1
  • J. L. Stoller
    • 1
  • P. N. Nunn
    • 1
  • I. B. Holubitsky
    • 1
  • F. R. C. Johnstone
    • 1
  • R. C. Harrison
    • 1
  1. 1.Department of SurgeryUniversity of British Columbia, Vancouver General HospitalVancouverCanada

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