| _t | Haz. Ratio | Std. Err. | z | P>|z| | [95% Conf. Interval] | |
| score | ||||||
| Medium risk | 1.271235 | .1593392 | 1.91 | 0.056 | .9943389 | 1.625238 | 
| High risk | 1.769899 | .3219273 | 3.14 | 0.002 | 1.239148 | 2.52798 | 
| _t | Haz. Ratio | Std. Err. | z | P>|z| | [95% Conf. Interval] | |
| score | ||||||
| Medium risk | 1.271235 | .1593392 | 1.91 | 0.056 | .9943389 | 1.625238 | 
| High risk | 1.769899 | .3219273 | 3.14 | 0.002 | 1.239148 | 2.52798 |