The probability of esophagitis by endoscopy was 0.16, the probability of duodenal ulcer by endoscopy was 0.0125, and the probability of esophageal cancer by endoscopy was 0.
The probability of reflux or esophagitis by UGI series was 0.075, and the probabilities of duodenal or gastric ulcer by UGI series or esophageal cancer by UGI series were all 0.
The probability of a positive 24-hour pH result based on a symptom index of more than 75% was 0.17.
The probability of a positive manometry result was 0.35, and of a positive acid perfusion test was 0.21.
The probability of a positive result for at least 1 of 3 provocative tests if done as a group was 0.46.
The probability of a positive result for either edrophonium or IEBD, if both were done, was 0.345.
The probability of symptom improvement with 8 weeks of H2B was 0.6, and with 8 weeks of PPI 0.76.
The probability of recurrence off treatment with H2B or PPI was 0.75.
The probability of symptom relapse within 12 months while receiving H2B was 0.6.
The probability of symptom relapse within 12 months while receiving PPI was 0.2.
Neither quality of life nor prognosis were significantly affected by the initial management strategy.