Table 2.
Genotype and allele frequencies of the TNF-α − 308 polymorphism between women with and without endometriosis
| TNF-α | n | Genotype n (%) | Allele n (%) | |||
|---|---|---|---|---|---|---|
| *1*1 | *1*2 | *2*2 | 1 | 2 | ||
| Women without endometriosis | 186 | 171 (91.9) | 15 (8.1) | 0 (0.0) | 357 (95.7) | 15 (4.3) |
| Women with endometriosis | 183 | 159 (86.9) | 24 (13.1) | 0 (0.0) | 342 (93.4) | 24 (6.6) |
| Stage I | 63 | 54 (85.7) | 9 (14.3) | 0 (0.0) | 117 (92.9) | 9 (7.1) |
| Stage II | 54 | 48 (88.8) | 6 (11.2) | 0 (0.0) | 102 (94.4) | 6 (5.6) |
| Stage I/II | 117 | 102 (87.2) | 15 (12.8) | 0 (0.0) | 219 (93.6) | 15 (6.4) |
| Stage III | 42 | 39 (92.9) | 3 (7.1) | 0 (0.0) | 81 (96.4) | 3 (3.6) |
| Stage IV | 24 | 18 (75.0) | 6 (25.0)1 | 0 (0.0) | 42 (87.5) | 6 (12.5)2 |
| Stage III/IV | 66 | 57 (86.4) | 9 (13.6) | 0 (0.0) | 123 (93.2) | 9 (6.8) |
1x2 = 5.02, p = 0.025, OR = 3.8 (95% CI 1.31–11.01) versus women without endometriosis
2x2 = 4.75, p = 0.029, OR = 3.4 (95% CI 1.25–9.23) versus women without endometriosis