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Table 3 GER positive pH data by clinical groups

From: Do gastrointestinal and respiratory signs and symptoms correlate with the severity of gastroesophageal reflux?

pH metry parameter

Group 1 gastrointestinal median (min max)

Group 2 respiratory median (min- max)

Group 3 mixed median (min-max)

P

Number of reflux episodes greater than 5 minutes in 24

2 (1-21)

3 (0-22)

2.5 (2-9)

0.682

Number of reflux episodes in 24 hours

74 (40-426)

61.5 (20-271)

92 (74-197)

0.286

Duration of the longest reflux episode

20 (10-260)

23 (10-146

24 (7-29)

0.919

The reflux index

8 (4-77.8)

7.8 (5-65)

10.3 (7.8-16)

0.576

Fraction of time with pH lower than 4 pH > 5 (%)

2.7 (0-6)

2 (0-10.9)

6 (4.7-11.5)

0.004