General Patient Characteristics and Univariate Analysis of DSS
| Characteristic | n | HR | 95% CI | P |
| HPV-positive | 13 (18.6) | 0.42 | 0.15–1.19 | 0.103 |
| Age (y) | 0.054 | |||
| Range | 37–86 | |||
| ≥52 (median age) | 36 (51.4) | 0.51 | 0.26–1.01 | |
| Sex | 0.65 | 0.09–4.77 | 0.673 | |
| Female | 4 (5.7) | |||
| Male | 66 (94.3) | |||
| Smoking | 57 (81.4) | 1.67 | 0.59–4.76 | 0.334 |
| T stage | 1.92 | 0.84–4.42 | 0.124 | |
| T3 | 20 (28.6) | |||
| T4 | 50 (71.4) | |||
| N stage | 1.19 | 0.54–2.63 | 0.676 | |
| N0-N2a | 18 (25.7) | |||
| N2b-N3 | 52 (74.3) | |||
| AJCC stage | 1.59 | 0.90–2.80 | 0.109 | |
| III | 8 (11.4) | |||
| IVa | 43 (61.4) | |||
| IVa | 19 (27.1) | |||
| PET parameters | ||||
| SUVmax > 12.87 | 53 (75.7) | 2.73 | 0.96–7.76 | 0.059 |
| Tumor TLG > 122.9 | 52 (74.3) | 4.72 | 1.44–15.48 | 0.010 |
| SUV entropy | ||||
| >1.112 (4 bins) | 34 (48.6) | 2.06 | 1.03–4.12 | 0.041 |
| >3.047 (32 bins) | 49 (70.0) | 3.04 | 1.17–7.85 | 0.022 |
| >3.725 (64 bins) | 43 (61.4) | 2.40 | 1.09–5.30 | 0.031 |
| Uniformity | ||||
| >0.138 (4 bins) | 43 (61.4) | 0.38 | 0.19–0.75 | 0.005 |
| >0.0017 (64 bins) | 28 (40.0) | 0.48 | 0.22–1.02 | 0.057 |
| Entropy | ||||
| >5.75 (32 bins) | 38 (54.3) | 1.94 | 0.95–3.98 | 0.071 |
| >6.56 (64 bins) | 51 (72.9) | 3.31 | 1.17–9.42 | 0.025 |
| Coarseness | ||||
| >0.021 (32 bins) | 18 (25.7) | 0.19 | 0.06–0.64 | 0.007 |
| >0.015 (64 bins) | 32 (45.7) | 0.48 | 0.24–0.99 | 0.047 |
Data in parentheses are percentages.