Mplus Users Guide v6.. - Muthén & Muthén

CHAPTER 6intervals plus one. These parameters can be referred to in the MODELcommand by adding to the name of the time-to-event variable thenumber sign (#) followed by a number. In the MODEL command, thebracket statement specifies that the 21 baseline hazard parameters arepart of the model.The default estimator for this type of analysis is maximum likelihoodwith robust standard errors. The estimator option of the ANALYSIScommand can be used to select a different estimator. An explanation ofthe other commands can be found in Examples 6.1 and 6.21.EXAMPLE 6.23: CONTINUOUS-TIME SURVIVAL ANALYSISUSING A PARAMETRIC PROPORTIONAL HAZARDS MODELWITH A FACTOR INFLUENCING SURVIVALTITLE: this is an example of a continuous-timesurvival analysis using a parametricproportional hazards model with a factorinfluencing survivalDATA: FILE = ex6.23.dat;VARIABLE: NAMES = t u1-u4 x tc;SURVIVAL = t (20*1);TIMECENSORED = tc;CATEGORICAL = u1-u4;ANALYSIS: ALGORITHM = INTEGRATION;BASEHAZARD = ON;MODEL: f BY u1-u4;[t#1-t#21];t ON x f;f ON x;OUTPUT: TECH1 TECH8;138