can shared frailty be significant what is the average aic of shared frailty why does shared frailty vary among wards how can a frailty conundrum be large? why does shared frailty vary is shared frailty non-sig what variable can be added to model for shared frailty can shared frailty be larger shared frailty definition how does shared frailty affect the outcome why is shared frailty a better fit in stata how do shared frailty effects occur can shared frailty be large does shared frailty variance what is the aic variable in cox proportional hazards what is the difference between shared frailty and ward level variables how can shared frailty variance be large how do frailty models work how is variance affected at the ward level of a cox model can shared frailty be a variable in stata