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Urine Creatinine

Indications
1. Creatinine Clearance Calculation
2. Measure completeness of 24 hour Urine Collection
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
Low Urine Creatinine
1. Values above decrease with advancing age
2. Low value suggests inadequately collected specimen

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This page was written by Scott Moses, MD. This page was last revised before 5/10/08, prior to consistent tracking of revision date. This page was last published on 6/1/2008. Please send comments and questions to the editor. Contact information may be found on the page About the Family Practice Notebook. These pages are best viewed with Microsoft Internet Explorer 6.0.