Table 2. Crude HRs [95% confidence intervals (95% CI)].
| HR | 95%CI |
P | ||
|---|---|---|---|---|
| Lower | Upper | |||
| Age, years | <0.001 | |||
| <58 | 1 | |||
| 58−68 | 2.8 | 1.2 | 6.7 | |
| >68 | 5.4 | 2.3 | 13 | |
| Sex | 0.27 | |||
| Female | 1 | |||
| Male | 1.4 | 0.8 | 2.5 | |
| Tumor location | 0.25 | |||
| Right upper lobe | 1 | |||
| Left upper lobe | 1.4 | 0.8 | 2.5 | |
| Histological type | 0.13 | |||
| Adenocarcinoma | 1 | |||
| Squamous | 1.7 | 0.9 | 3.2 | |
| Adenosquamous | 2.0 | 0.8 | 5.0 | |
| Grade of differentiation | 0.02 | |||
| Well | 1 | |||
| Moderate | 1.4 | 0.7 | 2.7 | |
| Poor | 3.7 | 1.6 | 8.5 | |
| Visceral pleura invasion | 0.64 | |||
| Absent | 1 | |||
| Present | 1.3 | 0.5 | 3.2 | |
| Tumor size, cm | 0.002 | |||
| ≤3 | 1 | |||
| 3.1−5 | 2.3 | 1.1 | 4.6 | |
| >5 | 4.3 | 2.0 | 9.6 | |
| Number of removed LN | 0.16 | |||
| <7 | 1 | |||
| ≥7 | 0.6 | 0.3 | 1.2 | |
| Number of removed MLN | 0.20 | |||
| <4 | 1 | |||
| ≥4 | 0.6 | 0.3 | 1.3 | |
| Number of removed SMLNS | 0.004 | |||
| <2 | 1 | |||
| ≥2 | 0.4 | 0.3 | 0.8 | |
LN=lymph nodes; MLN=mediastinal lymph nodes; SMLNS=superior mediastinal lymph node stations