Selection criteria for upper gastrointestinal examinations: attempts at improvement.

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Abstract
An attempt was made to improve upon selection criteria for the performance of upper gastrointestinal (UGI) series in 3 settings: a teaching hospital, a community hospital and a health maintenance organization. Two statistical techniques, the polychotomous logistic model (to develop predictive algorithms for the identification of specific diseases) and the maximum attainable discrimination technique were used to show the relationship between the percentage of patients with any disease detected and the percentage of UGI examinations performed. Neither technique improved significantly upon selection criteria for identifying patients with abnormal UGI series.