Chronic Kidney Disease Staging in Nursing Home and Community Older Adults: Does the Choice of Cockcroft-Gault, Modification of Diet in Renal Disease Study, or the Chronic Kidney Disease Epidemiology Collaboration Initiative Equations Matter?

The Cockcroft-Gault equation systematically provides lower (more severe) estimates of renal function than the Modification of Diet in Renal Disease Study and Chronic Kidney Disease Epidemiology Collaboration equation in patients older than 70 years. However, significant differences in CKD staging derived from estimate of glomerular filtration rate or creatinine clearance were not observed in adults from 59 to 69 years of age. These findings do not validate one formula over the others, but demonstrate that disparities exist; it may be prudent to use the same formula over time in a given patient to monitor changes in renal function.