Stevens' formula for serum cystatin C, age, and sex
GFR is estimated with the 2nd formula proposed by Stevens et al. (Am J Kidney Dis 2008), where cystatin C is weighted by sex and age
Stevens.cys2(cystatin, sex, age, ethnicity)
Numeric vector with serum or plasma cystatin C values in mg/dl
Numeric vector with 0 for females and 1 for males
Numeric vector with age in years
Numeric vector with 0 for non-Black and 1 for Black individuals
A numeric vector with eGFR values in ml/min/1.73 m^2.
Stevens LA, et al. Estimating GFR using serum cystatin C alone and in combination with serum creatinine: a pooled analysis of 3,418 individuals with CKD. Am J Kidney Dis 2008; 51: 395-406.
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