egfr - Estimated Glomerular Filtration Rate (eGFR) Calculators

A comprehensive, vectorised toolkit for estimating glomerular filtration rate (eGFR) and creatinine clearance from serum creatinine, cystatin C, or both. Implements 20 validated adult, paediatric, and neonatal equations, including CKD-EPI (2009, 2012, 2021), MDRD, Cockcroft-Gault, EKFC, FAS, Lund-Malmoe, the Berlin Initiative Study, Schwartz bedside, CKiD U25, CAPA, and a neonatal equation. Helpers for body surface area, CKD (KDIGO) staging, and unit conversions are included. Inspired by the 'kidney.epi' package.