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)
A numeric vector with eGFR values in ml/min/1.73 \(m^2\).
Numeric vector with serum or plasma cystatin C values in mg/l
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
Cristian Pattaro
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.
Stevens.cys1
, Stevens.creat.cys
, CKDEpi.cys