<prompt> A 65 years old male is having weight 60kg and serum creatining 3mgd1. What is creatinine clearance5101520  <response>: Ans: D. 20Ref: Textbook of clinical nephrology 4he p. 136Creatinine clearance is calculated by Cockcroft-Gault equation :-Creatinine clearance 72 x serum creatinine in mgdl.Creatinine clearance 72 x 3 20.83 mlminNote:In females the values are multiplied by 0.S5.Thus, for same values, creatinine clearance in female of 65 years 17.7 20.83 x 0.85. 