egfr.schwartz {kidney.epi}

Schwartz (for children only)

Description

Schwartz (for children only)

Usage

egfr.schwartz(creatinine, age, sex, height_cm = 0, height_ft = 0,
  height_inch = 0, creatinine_units = "micromol/l",
  equation_type = "classic", 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. Age does not accounted in Schwartz equation, but used in the function to check whether Schwartz equation could be applied to a given patient.

sex

Vector. The value of variable refers to the parameters label_sex_male and label_sex_female. Required only in case of quadratic Schwartz equation.

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".

equation_type

Character string. Define whether to calculate eGFR either by classic Schwartz or quadratic Schwartz equation. Could be one of the following: "classic", "quadratic". If not explicitly defined by user, the default assumption is "classic".

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 Schwartz equation Reference to the equation: Gao A, Cachat F, Faouzi M et al. Comparison of the glomerular filtration rate in children by the new revised Schwartz formula and a new generalized formula. Kidney International 2013;83:524–30.

Programming: Boris Bikbov [e-mail]. Citation: Bikbov B. R open source programming code for calculation of the Kidney Donor Profile Index and Kidney Donor Risk Index. Kidney Diseases, 2018. DOI: 10.1159/000492427 (citation for the whole package)

Value

numeric eGFR expressed in ml/min/1.73m².

Examples

egfr.schwartz (creatinine = 1.4, age = 10, height_cm = 90, sex = "Male",
  creatinine_units = "mg/dl")
egfr.schwartz (creatinine = 1.4, age = 10, height_cm = 90, sex = "Male",
  creatinine_units = "mg/dl", equation_type = "quadratic")