Testing for centre effects in multi-cent
β
Per Kragh Andersen; John P. Klein; Mei-Jie Zhang
π
Article
π
1999
π
John Wiley and Sons
π
English
β 115 KB
π 3 views
The problem of testing for a centre e!ect in multi-centre studies following a proportional hazards regression analysis is considered. Two approaches to the problem can be used. One "ts a proportional hazards model with a "xed covariate included for each centre (except one). The need for a centre spe