| gri {iglu} | R Documentation |
Calculate Glycemia Risk Index (GRI)
Description
The function gri produces a tibble object with values equal to the glycemia risk index (GRI) metric. The output columns are subject id and GRI value. ' The output rows correspond to subjects.
Usage
gri(data)
Arguments
data |
DataFrame object with column names "id", "time", and "gl", or numeric vector of glucose values. |
Details
A tibble object with 1 row for each subject, a column for subject id and column for GRI is returned. The formula for GRI is as follows:
(3.0 × VLow) + (2.4 × Low) + (1.6 × VHigh) + (0.8 × High)
where VLow, Low, VHigh, and High correspond to the percent of glucose values in the ranges <54 mg/dL, 54-70 mg/dL, >250 mg/dL, and 180-250 mg/dL respectively. The maximum allowed value for GRI is 100%, any calculated values higher than 100 are capped.
Value
A tibble object with columns for subject id and GRI value. Rows correspond to individual subjects.
Author(s)
Elizabeth Chun
References
Klonoff et al. (2022) A Glycemia Risk Index (GRI) of Hypoglycemia and Hyperglycemia for Continuous Glucose Monitoring Validated by Clinician Ratings. J Diabetes Sci Technol doi:10.1177/19322968221085273.
Examples
data(example_data_1_subject)
gri(example_data_1_subject)
data(example_data_5_subject)
gri(example_data_5_subject)