How long does it take for an elderly person to die from moderate kidney failure?

See below: People do not die of moderate renal failure we like to determine what stage 1 to 5 your kidneyfunction is at..Important to know what GFR of your kidneys.When this rate is less than 10-15 , [normally90 ] and untreated you develop what is called uremia [accumulation of waste in your blood] or if there are electrolyte abnormalities like high pottassium, this would cause the heart to slow down or stop.