Table 1 Demographic and etiologic characteristics of HCC cases and controls
From: XPD codon 312 and 751 polymorphisms, and AFB1 exposure, and hepatocellular carcinoma risk
| Â | Controls | Cases | Â | Â |
|---|---|---|---|---|
|  | No. (%) | No. (%) | χ2 | Two-sided P |
Sex | Â | Â | 1.945 | 0.163 |
   Male | 540 (75.8) | 448 (72.5) |  |  |
   Female | 172 (24.2) | 170 (27.5) |  |  |
Age(years) a | Â | Â | 2.672 | 0.263 |
   < 35 | 86 (12.1) | 58 (9.4) |  |  |
   35-65 | 554 (77.8) | 500 (80.9) |  |  |
   > 65 | 72 (10.1) | 60 (9.7) |  |  |
Ethnicity | Â | Â | 0.891 | 0.345 |
   Han | 318 (44.7) | 292 (47.2) |  |  |
   Minority | 394 (55.3) | 326 (52.8) |  |  |
HBV infection | Â | Â | 0.354 | 0.552 |
   HBsAg (+) | 508 (71.3) | 450 (72.8) |  |  |
   HBsAg (-) | 204 (28.7) | 168 (27.2) |  |  |
HCV infection | Â | Â | 0.049 | 0.825 |
   Anti-HCV (+) | 128 (18.0) | 114 (18.4) |  |  |
   Anti-HCV (-) | 584 (82.0) | 504 (81.6) |  |  |