Is CKD subgroup defined by kidney function or proteinuria measured at baseline?
Yes, CKD subgroup is defined by kidney function or proteinuria measured at baseline. It is graded on the basis of whether or not the CKD subgroup results of trials that were not specifically designed for CKD were applicable to patients with CKD and also whether or not a test for interaction by baseline kidney function (or the level of proteinuria) was performed.