Figure 2From: Correction of the significance level when attempting multiple transformations of an explanatory variable in generalized linear models (a) Type-I error rate for various numbers of categorical in three classes according to different methods, (b) and power for an effect of a categorical transformation in three classes defined by cutpoints at the first and third quartile. (γ 0 =−1.25,γ 1=1,β T=(2,1.8)).Back to article page