Identifying Some Risk Factors of Time to Relapses in Schizophrenic Patients using Bayesian Approach with Event-Dependent Frailty Model.

Olesen and Mortensen analyzed the schizophrenia data in a shared frailty model adjusting for calendar year, age of onset, duration of latest hospital admission as confounders and estimated a frailty variance of 0.448, which was highly significant, suggesting that considerable heterogeneity was present ( 27 ).We concluded that the shape parameter of Weibull distribution was less than 1 which resulted in decreasing hazard.

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