Cox Proportional Hazards Models for Overall Survival.

Abbreviations: Hazard Ratio, HR; Confidence Intervals, CI. Statistically significant hazard ratios (p < 0.05) are shown in bold. 1 The imaging features are dichotomized at their respective median values and age is dichotomized at 65 years 2 Each imaging biomarker is analyzed independently in separate univariate models. The unadjusted HRs represent the main effects of each covariate. 3 Based on forward selection, only two imaging biomarkers are included in the model but excluded age, gender, and stage. 4 Only two imaging biomarkers are included in the model in addition to age, gender, and stage Cox Proportional Hazards Models for Overall Survival.