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Table 3 Cox Proportional Hazard Model Analysis

From: Clinical application of tumor volume in advanced nasopharyngeal carcinoma to predict outcome

Variables Overall survival (RR, 95% CI) p Disease-specific survival (RR, 95% CI)) p Disease-free survival (RR, 95% CI) p Loco-regional control (RR, 95% CI) p Distant metastasis-free survival (RR, 95% CI) p
T1-2 vs. T3-4 1.29, 0.56-2.98 0.56 1.42, 0.41-4.86 0.58 0.85, 0.34-2.16 0.73 1.44, 0.27-7.64 0.67 1.00, 0.36-2.81 1.00
N0-2 vs. N3 2.47, 0.48-12.71 0.28 1.86, 0.15-23.26 0.63 2.85, 0.53-15.18 0.22 39.06, 1.55-983.27 0.03 2.77, 0.54-14.07 0.22
Cranial nerve involvement 0.71, 0.26-1.95 0.51 0.73, 0.17-3.13 0.67 0.65, 0.18-2.28 0.50 0.11, 0.006-2.10 0.14 0.95, 0.26-3.46 0.94
Supraclavicular nodes 0.74, 0.15-3.74 0.71 0.78, 0.06-9.59 0.85 0.45, 0.08-2.50 0.36 0.02, 0.001-0.87 0.04 0.68, 0.13-3.43 0.64
GTVprn (13 ml) 2.92, 1.22-6.98 0.02 4.10, 1.06-15.97 0.04 4.81, 1.73-13.36 < 0.01 16.83, 1.48-190.78 0.02 2.50, 0.84-7.43 0.10
  1. RR, risk ratio; 95% CI, 95% confidence interval; GTVprn, gross tumor volume of primary tumor plus retropharyngeal nodes