H. pylori infection | Controls | Location of ESCC | Total cases | ||||
---|---|---|---|---|---|---|---|
Upper + Middle | lower | ||||||
No. (%) |
No. (%) |
AOR1
(95% CI) |
No. (%) |
AOR1
(95% CI) |
No. (%) |
AOR1
(95% CI) | |
Negative |
92 (47) |
76 (62) | 1.0 |
38 (66) | 1.0 |
114 (63) | 1.0 |
Positive |
102 (53) |
46 (38) |
0.6 (0.3 – 1.1) |
20 (34) |
0.5 (0.2 – 1.0) |
66 (37) |
0.5 (0.3 – 0.9) |