Model | Age Hazard Ratio | Az |
---|
Accepted | Â | Â |
Dichotomous Age | 1.72 (1.02, 2.90) | 0.5792 |
Grade adjusted | 1.78 (1.06, 3.02) | 0.606 |
Gender adjusted | 1.64 (0.96, 2.78) | 0.669 |
Grade Gender adjusted | 1.68 (0.99, 2.85) | 0.677 |
Model | z Hazard Ratio | Az |
Hybrid | Â | Â |
Dichotomous z | 0.25 (0.14, 0.47) | 0.691 |
Gender adjusted | 0.28 (0.15, 0.53) | 0.738 |
- For the age and z variables, two groups were formed using the respective distribution median as the cut-point and compared. The hazard ratios (HRs) are provided parenthetically with 95% confidence intervals. The area under the receiver operating characteristic curves (Azs) derived from Cox regression models are also provided. Because age and z translate inversely with respect to hazard, increased age confers a greater hazard while decreased z confers a greater hazard. To make HR comparisons of z with age, the reciprocal of the z HR is required.