Prospective Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Apr 28, 2015; 21(16): 5009-5016
Published online Apr 28, 2015. doi: 10.3748/wjg.v21.i16.5009
Table 3 Twenty-four-hour intraesophageal pH-multichannel intraluminal impedance testing
VariablepH-POS (n = 22)HE (n = 34)FH (n = 22)P value1
% acid exposure time16.1 ± 15.3b1.4 ± 2.40.7 ± 0.8< 0.01
Number of reflux episodes77.8 ± 40.6b54.6 ± 30.333.9 ± 20.8< 0.01
Acid reflux (pH < 4)34.1 ± 23.7b11.2 ± 11.17.1 ± 6.3< 0.01
Non-acid reflux (pH ≥ 4)41.0 ± 35.137.7 ± 32.223.8 ± 17.30.2
Number of proximal reflux episodes34.4 ± 26.7b22.2 ± 12.514.1 ± 9.0< 0.01
% of proximal reflux Episodes42.5 ± 14.342.5 ± 13.341.4 ± 14.30.9
% of gastric acid exposure time66.1 ± 20.550.6 ± 30.949.9 ± 28.70.1