Log odds of transfusion against hematocirt percentiles COMPARISONS OF METHODS FOR MODELING NON-LINEARITY We next compared several strategies to handle the non-linear relationship between hct and transfusion risk using SAS (Table 2). SAS procedures LOGISTIC, GLIMMIX and GLMSELECT have EFFECT statement ...
Little is known about the impact of pooling in the presence of misspecification of the disease risk function (e.g., when investigators assume that there is a monotonic gradient in log(risk) when in fact there is non-linearity), miss-measured covariates, and in the presence of outcome ...