Description Usage Arguments Details Value

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.

1 |

`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. |

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

`param` |
A character vector, containing one of more of the following parameters (case insensitive): "FEV1", "FVC", "FEV1FVC", "FEF2575", "FEF75", "FEV075", "FEV075FVC" |

This is for internal use only.

Arguments `age`

, `height`

, `gender`

and `ethnicity`

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.

A data.frame with L, M and S, for every patient and every parameter requested

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