What to know
Several R packages and functions calculate percentiles and z-scores from ob体育, World Health Organization (WHO), and other growth charts. These packages and functions are in addition to Statistical Analysis System (SAS) programs for calculating metrics from growth charts.

R packages and functions
R packages on GitHub
- : For ob体育 Growth Charts. It includes the 2022 extended z-score and percentile calculations for children and adolescents with obesity.
- : For WHO Growth Charts.
Packages and functions on CRAN
- : WHO z-scores and percentiles.
- : Calculation of standard deviation (z) scores and percentiles based on different standards, including those from WHO, the United Kingdom, Germany, Italy, China, and the United States. See the function, sds. Note that this package does not include the 2022 extended z-score and percentile calculations for children and adolescents with obesity.
Additional functions
Two functions in the help convert overweight and obesity prevalence between the ob体育, WHO, and International Obesity Task Force (IOTF) growth charts.
- ob_convertr
- ob_convertr2