Table 2 Results of multivariate analysis: risk factors for distant metastasis in nasopharyngeal carcinoma
Variables | Hazard ratio | 95% confidence interval | p value |
|---|---|---|---|
Primary tumor volume | 1.012 | 1.003-1.022 | 0.007 |
T classification T1 | 1.0 | ref | 0.152 |
T2 | 6.291 | 0.827-47.863 | |
T3 | 8.690 | 1.146-65.888 | |
T4 | 7.488 | 0.882-63.574 | |
N classification N0 | 1.0 | ref | <0.001 |
N1 | 2.009 | 1.018-3.962 | |
N2 | 4.095 | 2.080-8.063 | |
N3 | 11.931 | 3.454-41.220 |