calc_ibw: Calculate ideal body weight for children and adults

In ronkeizer/clinPK: Clinical Pharmacokinetics Toolkit

Description

Get an estimate of ideal body weight. This function allows several commonly used equations

Usage

calc_ibw(weight = NULL, height = NULL, age = NULL, sex = "male",
  method_children = "standard", method_adults = "devine", digits = NULL)

Arguments

weight	weight in kg, can be vector
height	height in cm, can be vector
age	age in years, can be vector
sex	either 'male' or 'female', can be vector
method_children	method to use for children >1 and <18 years. Choose from 'standard', 'mclaren' (McLaren DS, Read WWC. Lancet. 1972;2:146-148.), 'moore' (Moore DJ et al. Nutr Res. 1985;5:797-799), 'bmi' (), 'ada' (American Dietary Association)
method_adults	method to use for >=18 years. Choose from 'devine' (default, Devine BJ. Drug Intell Clin Pharm. 1974;8:650-655).
digits	number of decimals (can be NULL to for no rounding)

Details

Equations:

<1yo Use actual body weight

1-17 years old ('standard'): if height < 5ft: IBW= (height in cm2 x 1.65)/1000 if height > 5ft: IBW (male) = 39 + (2.27 x height in inches over 5 feet) IBW (female) = 42.2 + (2.27 x height in inches over 5 feet)

Methods not implemented yet: McLaren: IBW = - step1: x = 50th percentile height for given age - step2: IBW = 50th percentile weight for x on weight-for-height scale Moore: IBW = weight at percentile x for given age, where x is percentile of height for given age BMI: IBW = 50th percentile of BMI for given age x (height in m)^2 ADA: IBW = 50th percentile of WT for given age

>= 18 years old (Devine equation) IBW (male) = 50 + (2.3 x height in inches over 5 feet) IBW (female) = 45.5 + (2.3 x height in inches over 5 feet)

Examples

calc_ibw(weight = 70, height = 170, age = 40, sex = "female")
calc_ibw(weight = 30, height = 140, age = 10, sex = "female")

ronkeizer/clinPK documentation built on May 20, 2019, 5:07 p.m.