Signs and symptoms of a Renal Failure first appear when Renal function deteriorates by more than:
Answer is C (>60%): Signs of renal failure become apparent when renal function deteriorates by more than 60% ( residual renal function between 20-50%) while ove symptoms usually develop only after renal function has deteriorated by >75 - 80% (residual renal function <20%)
20%
40%
60%
80%