Calculate eA1C

The function ea1c produces eA1C values in a tibble object.

Usage

ea1c(data)

Arguments

data

DataFrame object with column names "id", "time", and "gl", or numeric vector of glucose values.

Value

If a data.frame object is passed, then a tibble object with two columns: subject id and corresponding eA1C is returned. If a vector of glucose values is passed, then a tibble object with just the eA1C value is returned. as.numeric() can be wrapped around the latter to output just a numeric value.

Details

A tibble object with 1 row for each subject, a column for subject id and a column for eA1C values is returned. NA glucose values are omitted from the calculation of the eA1C.

eA1C score is calculated by \((46.7+mean(G))/28.7\) where G is the vector of Glucose Measurements (mg/dL).

References

Nathan (2008) Translating the A1C assay into estimated average glucose values Hormone and Metabolic Research 31 .1473-1478, doi:10.2337/dc08-0545 .

Author

Marielle Hicban

Examples

data(example_data_1_subject)
ea1c(example_data_1_subject)
#> # A tibble: 1 × 2
#>   id         eA1C
#>   <fct>     <dbl>
#> 1 Subject 1  5.94

data(example_data_5_subject)
ea1c(example_data_5_subject)
#> # A tibble: 5 × 2
#>   id         eA1C
#>   <fct>     <dbl>
#> 1 Subject 1  5.94
#> 2 Subject 2  9.24
#> 3 Subject 3  6.99
#> 4 Subject 4  6.15
#> 5 Subject 5  7.71