calc_ibw {clinPK}R Documentation

Calculate ideal body weight for children and adults

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")

[Package clinPK version 0.9.0 Index]