Gastric juice acidity in upper gastrointestinal diseases

Table 4 pH levels of gastric juices in upper gastrointestinal diseases n (%)

pH of gastric juice	HS (n = 165)	EU (n = 21 )	GU (n = 136)	DU (n= 100)	GC (n = 89)
Level
pH < 2	82 (50)	19 (91)	33 (24)	55 (55)	5 (5)
2 ≤ pH < 3.5	46 (28)	1 (5)	63 (46)	40 (40)	6 (7)
3.5 ≤ pH < 4.0	6 (4)	0 (0)	5 (4)	2 (2)	5 (6)
4.0 ≤ pH < 5.0	5 (3)	0 (0)	7 (5)	0 (0)	5 (6)
5.0 ≤ pH < 6.0	5 (3)	0 (0)	3 (2)	1 (1)	2 (2)
6.0 ≤ pH < 7.0	2 (1)	0 (0)	2 (2)	1 (1)	9 (10)
7 ≤ pH	19 (12)	1 (5)	23 (17)	1 (1)	57 (65)
mean ± SE	2.90 ± 0.16	1.91 ± 0.28a	3.42 ± 0.20b	2.09 ± 0.09a	6.62 ± 0.22b

^aP < 0.05,

^bP < 0.001 vs healthy subjects. HS: Healthy subjects; EU: Esophageal ulcer; GU: Gastric ulcer; DU: Duodenal ulcer; GC: Gastric cancer.