Bivariate Analysis of Factors Predictive of PFS and OS
| PFS | OS | |||||
| Risk factor | Hazard ratio | 95% confidence interval | P | Hazard ratio | 95% confidence interval | P |
| Patients with interim PET/CT (n = 62) | ||||||
| PIT score (2–4 vs. 0–1) | 2.043 | 0.956–4.363 | 0.065 | 3.413 | 1.430–8.144 | 0.006 |
| Interim PET/CT (positive vs. negative) | 5.589 | 1.961–15.928 | 0.001 | 3.402 | 1.013–11.425 | 0.048 |
| Patients with posttherapy PET/CT (n = 47) | ||||||
| PIT score (2–4 vs. 0–1) | 1.216 | 0.410–3.602 | 0.725 | 4.744 | 1.390–16.193 | 0.013 |
| Posttherapy PET/CT (positive vs. negative) | 4.954 | 2.285–10.740 | <0.001 | 3.722 | 1.393–9.948 | 0.009 |