Table 2.
Baseline Estimated Glomerular Filtration (eGFR) Stage Reclassification of Black Participants After Adoption of the Race-Free 2021 Chronic Kidney Disease Epidemiology Collaboration eGFR Creatinine Equationa
| eGFR Stage per 2009 CKD-EPI eGFRcr Equation | eGFR Stage per Race-Free 2021 CKD-EPI eGFRcr Equation, No. (%) of Participants | ||||
|---|---|---|---|---|---|
| Stage 1 (n = 18 141) |
Stage 2 (n = 10 736) |
Stage 3 (n = 2127) |
Stage 4 (n = 275) |
Stage 5 (n = 19) | |
| Stage 1 (n = 22 311) | 18 141 (81) | 4170 (19) | |||
| Stage 2 (n = 7299) | 0 | 6566 (90) | 733 (10) | 0 | 0 |
| Stage 3 (n = 1449) | 0 | 0 | 1394 (96) | 55(4) | 0 |
| Stage 4 (n = 239) | 0 | 0 | 0 | 220 (92) | 19 (8) |
Abbreviations: CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; eGFR, estimated glomerular filtration rate; eGFRcr, eGFR creatinine.
eGFR stages were defined as follows: stage 1, eGFR ≥90 mL/min/1.73 m2; stage 2, 60–89 mL/min/1.73 m2; stage 3, 30–59 mL/min/1.73 m2; stage 4, 15–29 mL/min/1.73 m2; and stage 5, <15 mL/min/1.73 m2.