Ma et al reported an equation of estimating the glomerular filtration rate (GFR) in a Chinese population using serum cystatin C and creatinine. The authors are from Peking University and other institutions in China.
Patient selection: Chinese patient with chronic kidney disease
estimated GFR is expressed in mL per min per 1.73 square meter
Parameters:
(1) serum cystatin C in mg/L
(2) serum creatinine in mg/dL
(3) gender
(4) age in years
estimated GFR from cystatin C, age, gender, and creatinine =
= 169 * ((cystatin C)^(-0.63)) * ((age)^(-0.157)) * (0.83 if female, 1 if male) * ((serum creatinine)^(-0.608))
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