getLMS

This function calculates the L,M,S splines using GLI-2012 equations. The output
of this function is used in calculating the LLN and predicted spirometry parameters.
Checking of the input is also performed here.

internal

Implementation of various spirometry equations
in R, currently the GLI-2012 (Global Lung Initiative;
Quanjer et al. 2012 <doi:10.1183/09031936.00080312>),
the race-neutral GLI global 2022 (Global Lung Initiative;
Bowerman et al. 2023 <doi:10.1164/rccm.202205-0963OC>) and the
NHANES3 (National Health and Nutrition Examination Survey;
Hankinson et al. 1999 <doi:10.1164/ajrccm.159.1.9712108>)
equations.
Contains user-friendly functions to calculate predicted
and LLN (Lower Limit of Normal) values for different
spirometric parameters such as FEV1 (Forced Expiratory
Volume in 1 second), FVC (Forced Vital Capacity), etc,
and to convert absolute spirometry measurements
to percent (%) predicted and z-scores.

Theodore Lytras

rspiro

Implementation of Spirometry Equations

getLMS function

<dl><dt>age</dt>
<dd>Age in years</dd>
<dt>height</dt>
<dd>Height in meters</dd>
<dt>gender</dt>
<dd>Gender (1 = male, 2 = female) or a factor with two levels (first = male). Default is 1.</dd>
<dt>ethnicity</dt>
<dd>Ethnicity (1 = Caucasian, 2 = African-American, 3 = NE Asian, 4 = SE Asian,
5 = Other/mixed). Default is 1.</dd>
<dt>param</dt>
<dd>A character vector, containing one of more of the following parameters (case insensitive):
"FEV1", "FVC", "FEV1FVC", "FEF2575", "FEF75", "FEV075", "FEV075FVC"</dd></dl>

Arguments

Calculate L,M,S of GLI-2012 — getLMS

<dl>

<dt>age</dt>
<dd>Age in years</dd>


<dt>height</dt>
<dd>Height in meters</dd>


<dt>gender</dt>
<dd>Gender (1 = male, 2 = female) or a factor with two levels (first = male). Default is 1.</dd>


<dt>ethnicity</dt>
<dd>Ethnicity (1 = Caucasian, 2 = African-American, 3 = NE Asian, 4 = SE Asian,
5 = Other/mixed). Default is 1.</dd>


<dt>param</dt>
<dd>A character vector, containing one of more of the following parameters (case insensitive):
"FEV1", "FVC", "FEV1FVC", "FEF2575", "FEF75", "FEV075", "FEV075FVC"</dd>

</dl>

getLMS: Calculate L,M,S of GLI-2012

Description

Usage

Value

Arguments

Details