egfr.ckid_u25.cr: Calculate eGFR by CKiD U25 creatinine-based equation (for...

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

Calculate eGFR by CKiD U25 creatinine-based equation (for children and young adults less then 25 years old)

Description

Calculate eGFR by CKiD U25 creatinine-based equation (for children and young adults less then 25 years old)

Usage

egfr.ckid_u25.cr(
  creatinine,
  age,
  sex,
  height_cm = 0,
  height_ft = 0,
  height_inch = 0,
  creatinine_units = "micromol/l",
  label_sex_male = c("Male", 1),
  label_sex_female = c("Female", 0)
)

Arguments

creatinine	Numeric vector. Serum creatinine, could be expressed in "micromol/L", "mmol/L" or "mg/dL". Units of measurement should be defined in variable creatinine_units (if not defined explicitly by user, the default value is "micromol/L").
age	Numeric vector. Age, in years.
sex	Vector. The value of variable refers to the parameters label_sex_male and label_sex_female.
height_cm	Numeric vector. Could be defined either as height_cm if is measured in cm, or as height_ft and height_inch if is measured in feet and inches. If the parameter height_cm is greater than 0, the function uses cm, otherwise - feet and inches.
height_ft	see height_cm
height_inch	see height_cm
creatinine_units	Character string. Units in which serum creatinne is expressed. Could be one of the following: "micromol/L", "mmol/L" or "mg/dL".
label_sex_male	List. Label(s) for definition(s) of male sex.
label_sex_female	List. Label(s) for definition(s) of female sex.

Details

Calculate estimated glomerular filtration rate (eGFR) by creatinine-based CKiD U25 equation.

Reference to the equation: Pierce CB, Muñoz A, Ng DK, Warady BA, Furth SL, Schwartz GJ. Age- and sex-dependent clinical equations to estimate glomerular filtration rates in children and young adults with chronic kidney disease. Kidney International. 2021;99(4):948–956. doi:10.1016/j.kint.2020.10.047.

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.ckid_u25.cr (creatinine = 1.4, age = 10, height_cm = 90, sex = "Male",
  creatinine_units = "mg/dl")
# for a dataset - see vignettes for details
# egfr.ckid_u25.cr (creatinine = dta$scr, age = dta$age, height_cm = dta$ht,
#  sex = dta$sex, creatinine_units = "mg/dl")

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