| IHC score | NS (%) | BO (%) | BAC (%) | p Value* | |
| GPX3 | <0.001 | ||||
| 0 | 0 | 2 (40) | 19 (30.6) | ||
| 1 | 0 | 0 | 13 (21.0) | ||
| 2 | 2 (18.2) | 3 (60) | 18 (29.0) | ||
| 3 | 9 (81.8) | 0 | 12 (19.4) | ||
| GPX7 | <0.001 | ||||
| 0 | 0 | 1 (16.7) | 20 (30.8) | ||
| 1 | 0 | 2 (33.3) | 17 (26.2) | ||
| 2 | 4 (33.3) | 3 (50) | 17 (26.2) | ||
| 3 | 8 (66.7) | 0 | 11 (16.9) | ||
| GSTM2 | <0.001 | ||||
| 0 | 1 (8.3) | 1 (20) | 25 (39.1) | ||
| 1 | 0 | 2 (40) | 4 (6.3) | ||
| 2 | 4 (33.3) | 1 (20) | 12 (18.8) | ||
| 3 | 7 (58.3) | 1 (20) | 23 (35.9) |
BAC, Barrett’s adenocarcinoma; BO, Barrett’s oesophagus; IHC, immunohistochemistry; NS, normal oesophagus squamous epithelia.
*Fisher exact probability test.