COX-2 polymorphism | Controls | Location of ESCC | Total cases | ||||
---|---|---|---|---|---|---|---|
 |  | Upper + Middle | Lower |  |  | ||
 | No. (%) | No. (%). | AOR1 (95% CI) | No. (%). | AOR1 (95% CI) | No. (%). | AOR1 (95% CI) |
GG | 50 (26) | 23 (19) | 1.0 | 16 (28) | 1.0 | 39 (22) | 1.0 |
AG | 103 (53) | 59 (48) | 1.7 (0.7 – 4.0) | 21 (36) | 0.9 (0.3 – 2.3) | 80 (44) | 1.2 (0.6 – 2.4) |
AA | 41 (21) | 40 (33) | 2.0 (0.7 – 5.2) | 21 (36) | 2.3 (0.8 – 6.7) | 61 (34) | 2.3 (1.0 – 5.2) |
p for H-W2 | 0.471 | Â | Â | Â | Â | Â | Â |
GG+AG | 153 (79) | 82 (67) | 1.0 | 37 (64) | 1.0 | 119 (66) | 1.0 |
AA | 41 (21) | 40 (33) | 1.4 (0.7 – 2.9) | 21 (36) | 2.5 (1.0 – 6.1) | 61 (34) | 2.0 (1.1 – 3.9) |