Period

Integrated Esophageal Acidity

Time Esophageal pH < 4



Probability that Observed Prevalence of Pathologic Esophageal Reflux is Greater than Prevalence of FalsePositive Values

24hour

0.139

0.985

Nocturnal

0.066

0.999

 Bayesian posterior probabilities were calculated using the values for the prevalence of falsepositive values given in Table 1, the combined prevalence of pathologic esophageal reflux calculated from the index and 3rd studies, and a flat prior probability [8]. The calculations were for values of prevalence from 0 to 1.0 in steps of 0.05. The flat prior probability considered all prevalence values from 0 to 1.0 to be equally probable.