# calc_ibw: Calculate ideal body weight in kg for children and adults In clinPK: Clinical Pharmacokinetics Toolkit

 calc_ibw R Documentation

## Calculate ideal body weight in kg 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",
)
```

### Arguments

 `weight` weight in kg `height` height in cm `age` age in years `sex` sex `method_children` method to use for children >1 and <18 years. Currently '"standard"' is the only method that is supported. `method_adults` method to use for >=18 years. Currently '"devine"' is the only method that is supported (Devine BJ. Drug Intell Clin Pharm. 1974;8:650-655).

### 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")
```

clinPK documentation built on May 9, 2022, 9:06 a.m.