Table 8: Cox proportional hazard model to assess hazard of dying due to prostate cancer adjusted with propensity scores.

Parameter Estimate Hazard ratio (95% CI) P value
Treatment
Conservative management
-0.3062 0.736 (0.427, 1.268) 0.2696
Race
Black
Others
0.9310
-1.1677
2.537 (1.235, 5.211)
0.311 (0.046, 2.094)
0.0112
0.2301
Marital status
Single
-1.4567 0.233 (0.038, 1.415) 0.1135
Age
66-69
70-74
75-79
-3.1571
-1.7305
-1.8661
0.043 (0.016, 0.112)
0.177 (0.094, 0.334)
0.155 (0.072, 0.334)
< 0.0001
< 0.0001
< 0.0001
Grade
Well-differentiated
-0.9618 0.382 (0.057, 2.582) 0.3237
Comorbidity
Null
One
-1.0699
-1.3512
0.343 (0.189, 0.623)
0.259 (0.119, 0.566)
0.0004
0.0007

Note: Model was found to be statistically significant. Result of likelihood ratio test: χ2 value - 840.389 and P value < 0.0001. CI indicates Confidence Interval. Base case includes patients who were in immediate treatment group, with race white, married, aged 80 or above, with moderately differentiated tumors and with greater than 1 comorbidities.