Table 5 Multivariate analysis by Cox proportional hazard regression model for the evaluation of prognostic factors.
Variable (No. of patients) | No. of dead patients | Hazard ratio | 95% confidence interval | P |
|---|---|---|---|---|
| Â | (5-yr survival cut-off) | (HR) | (CI) | Â |
Age in years | Â | Â | Â | Â |
≤ 57 (25) | 21 | 1 |  |  |
>57 (26) | 22 | 1.25 | 0.62-2.48 | 0.533 |
PN expression | Â | Â | Â | Â |
Low (22) | 17 | 1 | Â | Â |
High (29) | 26 | 2.02 | 1.02-4.02 | 0.045* |
Lymph node metastasis | Â | Â | Â | Â |
Absence (36) | 28 | 1 | Â | Â |
Presence (15) | 15 | 3.13 | 1.54-6.35 | 0.002* |
Histological type | Â | Â | Â | Â |
Well-differentiated (20) | 16 | 1 | Â | Â |
Moderately-differentiated (8) | 8 | 2.77 | 1.10-6.98 | 0.031* |
Poorly-differentiated (8) | 7 | 1.64 | 0.63-4.29 | 0.310 |
Papillary (15) | 12 | 0.60 | 0.25-1.44 | 0.254 |
Tumor size (cm) | Â | Â | Â | Â |
≤ 5 (28) | 23 | 1 |  |  |
>5 (23) | 20 | 1.49 | 0.76-2.94 | 0.251 |