Variable | Cutoff level | Number | Survival rates (%) | Univariate | Multivariate | ||
---|---|---|---|---|---|---|---|
 | 1 year | 3 year | p-value | RR (95% CI) | P | ||
Age (year) | 0.980 | Â | Â | ||||
 | < 60 | 26 | 42.1 | 8.0 |  |  |  |
 | ≥ 60 | 221 | 25.5 | 15.3 |  |  |  |
Sex | 0.477 | Â | Â | ||||
 | Male | 21 | 36.6 | 24.4 |  |  |  |
 | Female | 26 | 39.6 | 29.7 |  |  |  |
Preoperative biliary drainage | 0.968 | Â | Â | ||||
 | Present | 19 | 37.9 | 6.3 |  |  |  |
 | Absent | 28 | 38.5 | 8.7 |  |  |  |
Associated gallstone | 0.341 | Â | Â | ||||
 | Present | 26 | 53.8 | 11.5 |  |  |  |
 | Absent | 21 | 54.5 | 0.0 |  |  |  |
Curability |  |  |  |  | 0.004 | 2.845 (1.314–6.158) | 0.008 |
 | Curative | 36 | 47.0 | 7.2 |  |  |  |
 | Non-curative | 11 | 9.1 | 0.0 |  |  |  |
Tumor location | 0.699 | Â | Â | ||||
Gallbladder neck | 28 | 42.5 | 8.5 | Â | Â | Â | |
Gallbladder body/fundus | 19 | 30.7 | 0.0 | Â | Â | Â | |
pT (TNM) | Â | Â | Â | Â | 0.170 | Â | Â |
 | pT1 and 2 | 16 | 42.2 | 12.7 |  |  |  |
 | pT3 and 4 | 31 | 35.2 | 4.4 |  |  |  |
Lymph node metastasis | 0.328 | Â | Â | ||||
 | Negative | 17 | 47.1 | 7.8 |  |  |  |
 | Positive | 30 | 32.2 | 10.1 |  |  |  |
Histologic differentiation | 0.432 | Â | Â | ||||
Well/Moderate | 43 | 38.8 | 6.0 | Â | Â | Â | |
 | Poor | 4 | 25.0 | 0.0 |  |  |  |
Hepatic invasion | 0.728 | Â | Â | ||||
 | Present | 26 | 30.5 | 6.1 |  |  |  |
 | Absent | 21 | 46.2 | 8.8 |  |  |  |
CRAO | Â | Â | Â | Â | 0.728 | Â | Â |
 | Present | 11 | 43.6 | 0.0 |  |  |  |
 | Absent | 36 | 35.9 | 7.2 |  |  |  |
Intraoperative blood infusion | 0.893 | Â | Â | ||||
 | Present | 25 | 34.5 | 12.9 |  |  |  |
 | Absent | 22 | 41.5 | 0.0 |  |  |  |
Adjuvant therapy | 0.179 | Â | Â | ||||
 | Yes | 7 | 51.4 | 25.7 |  |  |  |
 | No | 40 | 35.6 | 4.9 |  |  |  |
 | Overall | 47 | 37.8 | 6.0 |  |  |  |