rspiro (version 0.4)

LLN_GLIgl: Calculate LLN of spirometry parameters using GLI global (2022) equations

Description

This function calculates LLNs (Lower Limits of Normal) for the various spirometry parameters, using the GLI global (2022) equations. It accepts as input age, height, gender.

Usage

LLN_GLIgl(age, height, gender = 1, param = "FEV1")

Value

If param has length one, the function returns a numeric vector. If param

has length >1, it returns a data.frame with length(param) columns.

Arguments

age

Age in years

height

Height in meters

gender

Gender (1 = male, 2 = female) or a factor with two levels (first = male). Default is 1.

param

A character vector, containing one of more of the following parameters (case insensitive): "FEV1", "FVC", "FEV1FVC"

Details

Arguments age, height and gender are vectors of equal length, or of length one, in which case the value is recycled; if the four vectors are not of equal length, the function stops with an error.

Examples

# Find LLN of FEV1 and FVC for women aged 20 to 70 and with a height of 1.70 meters.
LLN_GLIgl(20:70, 1.7, 2, param=c("FEV1","FVC"))