egfr.schwartz.cys: Calculate eGFR by Schwartz cystatin C-based equation (for...

In kidney.epi: Kidney-Related Functions for Clinical and Epidemiological Research

Calculate eGFR by Schwartz cystatin C-based equation (for children only)

Description

Calculate eGFR by Schwartz cystatin C-based equation (for children only)

Usage

egfr.schwartz.cys(cystatin, cystatin_units = "mg/L")

Arguments

cystatin	Numeric vector. Serum cystatin, could be expressed in "mg/L" or "nanomol/L". Units of measurement should be defined in variable cystatin_units (if not defined explicitly by user, the default value is "mg/L").
cystatin_units	Character string. Units in which serum cystatin is expressed. Could be one of the following: "mg/L" or "nanomol/L"

Details

Calculate estimated glomerular filtration rate (eGFR) by Schwartz cystatin C-based equation.

Reference to the equation: Schwartz GJ, Schneider MF, Maier PS et al. Improved equations estimating GFR in children with chronic kidney disease using an immunonephelometric determination of cystatin C. Kidney Int 2012; 82: 445–453.

Citation: Bikbov B. kidney.epi: Kidney-Related Functions for Clinical and Epidemiological Research. Scientific-Tools.Org, https://Scientific-Tools.Org. DOI: 10.32614/CRAN.package.kidney.epi

Value

numeric eGFR expressed in ml/min/1.73m².

Author(s)

Programming: Boris Bikbov https://www.linkedin.com/in/boris-bikbov.

Examples

# for a single patient
egfr.schwartz.cys(cystatin = 1.4)
# for a dataset - see vignettes for details

kidney.epi documentation built on June 8, 2025, 10:54 a.m.