To cite the egfr package in publications use:

  Hovd M (2026). _egfr: Estimated Glomerular Filtration Rate (eGFR)
  Calculators_. R package version 0.1.0,
  <https://github.com/mhovd/egfr>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {{egfr}: Estimated Glomerular Filtration Rate (eGFR) Calculators},
    author = {Markus Hovd},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/mhovd/egfr},
  }