Table 5.
Bivariate analysis of clinico-pathological parameters
| Variable | Number (person-months) | IRR/100 | HR | 95%CI | P value |
| Age (10 yr added) | 153 (4026.8) | 2.96 | 0.99 | (0.97-1.01) | 0. 743 |
| Age (yr) | 0.003 | ||||
| Less than 70 | 147 (3984.4) | 2.84 | 1 | ||
| 70 or greater | 6 (42.4) | 14.15 | 4.71 | (2.02-10.97) | |
| Sex | 0.066 | ||||
| Male | 113 (2729.4) | 3.33 | 1 | ||
| Female | 40 (1297.4) | 2.16 | 0.68 | (0.44-1.04) | |
| Co-morbidity | 0.281 | ||||
| Present | 32 (1009.3) | 2.48 | 0.79 | (0.51-1.23) | |
| Absent | 121 (3017.5) | 3.12 | 1 | ||
| Operation | 0.061 | ||||
| Right hepatectomy | 63 (1389.1) | 3.89 | 1 | ||
| Right extended hepatectomy | 35 (1059.3) | 2.36 | 0.63 | (0.39-1.03) | |
| Left hepatectomy | 47 (1412.6) | 2.27 | 0.6 | (0.39-0.93) | |
| Bile duct resection | 8 (165.8) | 4.83 | 1.12 | (0.53-2.36) | |
| Portal vein resection | 0.259 | ||||
| Yes | 12 (3909.8) | 2.92 | 1.49 | (0.77-2.86) | |
| No | 141 (117.0) | 4.27 | 1 | ||
| Residual tumor status | < 0.001 | ||||
| R1 | 87 (2386.8) | 4.63 | 1 | ||
| R0 | 66 (1640.0) | 1.8 | 0.40 | (0.27-0.59) | |
| Lymph node metastasis | < 0.001 | ||||
| N1, 2 | 103 (3248.6) | 6.17 | 1 | ||
| N0 | 50 (778.2) | 2.19 | 0.38 | (0.26-0.55) | |
| Histology type | |||||
| Papillary carcinoma | 90 (2687.4) | 2.38 | 1 | 0.012 | |
| Others | 63 (1339.4) | 4.11 | 1.61 | (1.11-2.33) |
IRR: Incidence rate per 100 person-months.