II. Indications

  1. Creatinine Clearance Calculation
  2. Measure completeness of 24 hour Urine Collection

III. Normal 24 Hour Creatinine Excretion

  1. Male
    1. Age 20 to 50: 18.5 to 25.0 mg/kg/day
    2. Age 50 to 70: 15.7 to 20.2 mg/kg/day
    3. Range: 0.8-1.8 grams per 24 hours
  2. Female
    1. Age 20 to 50: 16.5 to 22.4 mg/kg/day
    2. Age 50 to 70: 11.8 to 16.1 mg/kg/day
    3. Range: 0.6-1.6 grams per 24 hours

IV. Low Urine Creatinine

  1. Values above decrease with advancing age
  2. Low value suggests inadequately collected specimen

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