e; DR, diabetic retinopathy; NPDR, non-proliferative diabetic retinopathy; PDR, proliferative diabetic retinopathy.](pone.0000000.g000){#pone.0000000.g000}  00.0000/journal.pone.0000000.t000  ###### Risk factors associated with CKD progression.  ![](pone.0000000.t000){#pone.0000000.t000g}    ------------------------------------------------------------------------------------------   Parameters                           