CHARACTERISTICS n %
Helicobacter pylori in the gastric biopsy    
Absent 211 69
Present:    
+ (mild)
++ (moderate)
+++ (intense)
64
20
11
20.9
6.5
3.6
Duodenal gastric metaplasia    
Absent
Incomplete
Intermediate
Complete
275
20
10
1
89.9
6.5
3.3
0.3
Chronic duodenitis    
Absent
Mild
Moderate
Severe
6
142
139
19
2.0
46.4
45.4
6.2
Activity of the duodenitis    
Absent
Present
257
49
84
16
Helicobacter pylori in duodeno    

Absent
Present
300
6
98
2
Alteration of Villus height:crypt depth ratio    

Absent
Present: Partial atrophy
121
185
39.5
60.5
Crypt hyperplasia    

Absent
Present
124
182
40.5
59.5
Damage to the superficial enterocitos    
Absent
Present
229
77
74.8
25.2
Brush border loss    
Absent
Present
272
34
88.9
11.1
Abnormal count of intraepithelial    
lymphocytes
Absent
Present
297
9
97.1
2.9
Duodenal ulcer    
Absent
Present
295
11
96.4
3.6
Table 1: Histopathological findings of 306 gastric and duodenal biopsies