Table 2.
Univariate and multivariate analysis for overall survival.
| Characteristics | Univariate analysis | Multivariate analysis | P value | ||
|---|---|---|---|---|---|
| HR | 95% CI | HR | 95% CI | ||
| Age group | |||||
| Under 62 years/over 63 years | 2.4 | 0.67–8.57 | 1.5 | 0.30–7.25 | 0.64 |
| Tumor size | |||||
| T2–4/T1 | 0.76 | 0.21–2.69 | 0.85 | 0.20–3.57 | 0.83 |
| Lymph node metastasis | |||||
| N2/N1 | 1.9 | 0.49–7.46 | 0.81 | 0.15–4.37 | 0.80 |
| Predominant subtype in primary tumors | |||||
| Grade III/Grade II | 4.4 | 1.21–15.9 | 12.7 | 1.17–142.9 | 0.037 |
| Predominant subtype in lymph nodes | |||||
| Grade III/Grade II | 0.72 | 0.21–2.51 | 0.18 | 0.02–1.66 | 0.13 |
HR: hazard ratio; 95% CI: 95% confidence interval; Grade II includes papillary- and acinar-predominant tumors and Grade III includes micropapillary- and solid-predominant tumors.