nag_surviv_cox_model (g12bac) Example Program Results Parameter Estimate Standard Error 1 -1.5091 0.4096 Deviance = 1.7276e+02 Time Survivor Function 1 0.9640 2 0.9264 3 0.9065 4 0.8661 5 0.8235 6 0.7566 7 0.7343 8 0.6506 10 0.6241 11 0.5724 12 0.5135 13 0.4784 15 0.4447 16 0.4078 17 0.3727 22 0.2859 23 0.1908