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"
)
ibw_standard(age, height = NULL, sex = NULL)
ibw_devine(age, height = NULL, sex = NULL)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)