Before 4 months we came to know that my father has stage 4 ckd.he is also diabetic from 4 years but under control.he also has high blood pressure 85/145. we consultated a nephrologist before two months.he is under medication and feeling better now. Now His cretanine level is 3.74 and blood urea is 100 now. My question is that how fast does this ckd progress from stage 4 to renal failure. We are little tense now because of his health and financial problem in my home. Please reply