Add CKiD U25 equations #1
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I have added functions to calculate eGFR for children ages 1-25 using the CKiD U25 algorithms. These include calculations based on creatinine, based on cystatin C, and a composite based on both. References: Pierce CB, Muñoz A, Ng DK, Warady BA, Furth SL, Schwartz GJ. Age- and sex-dependent clinical equations to estimate glomerular filtration rates in children and young adults with chronic kidney disease. Kidney International. 2021;99(4):948–956. doi:10.1016/j.kint.2020.10.047 https://www.niddk.nih.gov/research-funding/research-programs/kidney-clinical-research-epidemiology/laboratory/glomerular-filtration-rate-equations/children-adolescents-young-adults#ckid-u25
Update nephro.R with CKiD u25 equations
small improvement to labeling
Mixed up sex coding variable, now fixed. No change to the actual functions.
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I have added functions to calculate eGFR for children ages 1-25 using the CKiD U25 algorithms. These include calculations based on serum creatinine, based on Cystatin C, and a composite based on both.
References:
Pierce CB, Muñoz A, Ng DK, Warady BA, Furth SL, Schwartz GJ. Age- and sex-dependent clinical equations to estimate glomerular filtration rates in children and young adults with chronic kidney disease. Kidney International. 2021;99(4):948–956. doi:10.1016/j.kint.2020.10.047