[Hemochemical data in the function study of the senile kidney].

A survey was made of 2426 serum creatinine (SC) values in subjects over 60 and free from kidney diseases or other conditions capable of influencing the renal function. SC values were higher in males than in females and showed a tendency to increase with advancing age. The study of the correlation between endogenous creatinine clearance and both urea and SC showed that the latter represents a more reliable index of glomerular filtration rate than the former.