TABLE 2.
Maximum-Likelihood Parameter Estimates Along with R2 Values for Fitted AFT Models
| Model | E(log T) | σ^ | R2 |
| Population | 2.02 | 0.947 | Not applicable |
| Prognostic (PS, SUV) | 2.91 − 0.47 PS* − 0.19 − SUV†base | 0.855 | 16.4 |
| Predictive (δSUV) | 2.86 − 0.46 PS* − 0.19 SUV†base − 0.67 δSUV‡wk2 | 0.840 | 19.7 |
| Predictive (NL) | 3.02 − 0.45 PS* − 0.18 SUV†base − 0.75 NLPET¶wk2 | 0.792 | 27.0 |
| Predictive (NL, EGFR) | 2.75 − 0.40 PS‡ − 0.12 SUV‡base − 0.71 NLPET†wk2 + 0.95 EGFR† | 0.800 | 30.6 |
* P < 0.0001.
† P < 0.001.
‡ P < 0.01.
¶ P < 0.05.
Prognostic model includes PS and SUVbase. Additionally, the 3 predictive models include, respectively, δSUVwk2, NLPET, and NLPET and EGFR.