Table 1 Clinical and pathological characteristics of 15 pairs of HBV-positive and HBV-negative HCC tissue
Variable | Number | Percentage (%) | Variable | Number | Percentage (%) |
|---|---|---|---|---|---|
Age (years) | Â | Â | Tumor necrosis | Â | Â |
 < 45 | 5 | 33.3 |   No | 6 | 40 |
 ≥ 45 | 10 | 66.7 |   Yes | 9 | 60 |
Sex | Â | Â | Perineural invasion | Â | Â |
 Male | 12 | 80 |   Yes | 3 | 20 |
 Female | 3 | 20 |   No | 12 | 80 |
Occupation | Â | Â | Tumor invasion | 6 | 15 |
 Farmer | 7 | 46.7 |   Yes | 7 | 46.7 |
 Teacher | 3 | 20 |   No | 8 | 53.3 |
 Worker | 5 | 33.3 | Vascular invasion |  |  |
Histological grade | Â | Â | Â Â Yes | 6 | 40 |
 I | 2 | 13.3 |   No | 9 | 60 |
 II | 7 | 46.7 |  |  |  |
 III | 5 | 33.3 |  |  |  |
 IV | 1 | 6.7 |  |  |  |
 Tumor size (cm) | 4.59 ± 3.78 |  |  |  |  |