body_weight_calculations: Ideal Body Weight (IBW) and Adjusted Body Weight (ABW)

In cliot: Clinical Indices and Outcomes Tools

Ideal Body Weight (IBW) and Adjusted Body Weight (ABW)

Description

Calculates Ideal Body Weight (using the Devine Formula) and Adjusted Body Weight. These metrics are essential for calculating nutritional needs and dosing medications (e.g., aminoglycosides, acyclovir) in patients who are obese or have abnormal body composition.

Usage

body_weight_calculations(sex, height, actual_weight,
                         height_units = "in", weight_units = "kg")

Arguments

sex	String. Patient sex ("Male" or "Female").
height	Numeric. Patient height.
actual_weight	Numeric. Patient's current actual body weight.
height_units	String. Units for height input. Options: "in" (default) or "cm".
weight_units	String. Units for weight input. Options: "kg" (default) or "lbs".

Value

A list containing:

Ideal_Body_Weight_kg	Calculated IBW based on Devine formula.
Adjusted_Body_Weight_kg	Calculated ABW (IBW + 0.4 * (Actual - IBW)).
Actual_Body_Weight_kg	Standardized actual weight in kg.
Percent_Over_IBW	The percentage by which actual weight exceeds IBW.
Dosing_Suggestion	Logic suggesting which weight to use for dosing based on obesity status.

References

Devine BJ. Gentamicin therapy. Drug Intell Clin Pharm. 1974;8:650–655.

Examples

# Example 1: Male, Normal Weight (70 in, 75 kg)
body_weight_calculations("male", 70, 75)

# Example 2: Female, Obese (160 cm, 90 kg)
# Height ~63 in. IBW = 45.5 + 2.3(3) = 52.4 kg.
# Actual 90 kg. ABW = 52.4 + 0.4(90-52.4) = 67.4 kg.
body_weight_calculations("female", 160, 90, "cm", "kg")

cliot documentation built on Dec. 1, 2025, 1:06 a.m.