egfr.fas.cys: Calculate eGFR by the Full age spectrum (FAS) cystatin-based...

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

Calculate eGFR by the Full age spectrum (FAS) cystatin-based equation

Description

Calculate eGFR by the Full age spectrum (FAS) cystatin-based equation

Usage

egfr.fas.cys(
  cystatin,
  age,
  cystatin_units = "mg/L",
  equation_type = "precise",
  max_age = 100
)

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").
age	Numeric vector. Age, in years.
cystatin_units	Character string. Units in which serum cystatin is expressed. Could be one of the following: "mg/L" or "nanomol/L"
equation_type	Character string. Whether to use "precise" or "simplified" equation.
max_age	Numeric. Maximal age suitable for the equation application, in years. By default is 100 years, but change this value in case you would like to apply equation to older persons.

Details

Calculate estimated glomerular filtration rate (eGFR) by the Full age spectrum (FAS) cystatin-based equation.

Reference to the equation: Pottel H, Delanaye P, Schaeffner E et al. Estimating glomerular filtration rate for the full age spectrum from serum creatinine and cystatin C. Nephrol Dial Transplant 2017; 32:497–507 doi:10.1093/ndt/gfw425.

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.fas.cys (cystatin = 0.8, age = 60)
# for a dataset - see vignettes for details
# egfr.fas.cys (cystatin = dta$cys, age = dta$age)

kidney.epi documentation built on April 4, 2025, 4:33 a.m.