Table 3 The prevalence and concentrations of pepsin in saliva for controls and two groups of patients

Prevalence of positive samples (%)

29.5

32.3

62.0

<0.001

Proportion of subjects having at least one positive samples (%)

42.9

53.1

91.0

<0.001

Proportion of subjects having all three positive samples (%)

11.4

10.9

13.1

0.864

Concentrations of salivary pepsin (ng/mL), median (IQR)

0 (0–25)

18.5 (0–59.75)

153.3 (70–365.8)

<0.001