Predict GFR from serum creatinine, gender, race, and age.
ckd_epi_eq(scr, gender, reth, age_years)
Vector of serum creatinine values in mg/dL.
Vector of genders (either 'Male' or 'Female').
Vector of races/ethnicities.
Vector of ages in years.
Vector of GFR values in mL/min/1.73m^2.
From Levey AS, Stevens LA, Schmid CH, Zhang YL, Castro AF, Feldman HI, et al. A new equation to estimate glomerular filtration rate. Ann Intern Med 2009; 150(9):604-612. doi:10.7326/0003-4819-150-9-200905050-00006