Coefficient       Estimate             SE       z value INTERCEPT 3.7055 0.4965 7.46 AGE –0.0019 0.0112 –0.17 FEMALE 1.6118 0.3329 4.84 GN –0.0580 0.4048 –0.14 AN –0.5181 0.3911 –1.33 PKD 1.3264 0.5698 2.33

Table 4: Analysis of kidney data using a proportional hazards model with a shared frailty.