Table 2 Genotype distribution and relative allele frequencies of -238 polymorphism of TNF-alph a gene in Chinese with URSA (n = 132) and controls (n = 152).
Group | No. | Genotype frequency (%) | Allele frequency (%) | |||
|---|---|---|---|---|---|---|
| Â | Â | AA | AG | GG | A | G |
URSA | 132 | 0 (0) | 4 (3.0) | 128 (97.0) | 4 (1.5) | 260 (98.5) |
Controls | 152 | 0 (0) | 17 (11.2) | 135 (88.8) | 17 (5.6) | 287 (94.4) |
|  |  | χ2 = 6.9, df = 2, P = 0.009 | χ2 = 6.6, df = 1, P = 0.010 | |||