Table 1.
The Difference in Mean and Median eGFR With Different Estimating Equations Among Black and Non-Black Individuals in the UW and NHANES Cohorts
| UW |
NHANES |
|||
|---|---|---|---|---|
| Non-Black Patients | Black Patients | Non-Black Participants | Non-Hispanic Black Participants | |
| eGFR (creatinine-based 2009 CKD-EPI), mL/min/1.73 m2 | ||||
| Mean (SD) | 89.4 (23.4) | 99.8 (30.9) | 92.7 (17.6) | 101.1 (32.7) |
| Median (IQR) | 91.6 (75.9 to 105.3) | 102.6 (81.2 to 121.5) | 97.6 (81.2 to 114.1) | 108.1 (86.9 to 128.2) |
| eGFR (creatinine-based 2009 CKD-EPIno race), mL/min/1.73 m2 | ||||
| Mean (SD) | 89.4 (23.4) | 86.1 (26.7) | 92.7 (17.6) | 87.3 (28.2) |
| Median (IQR) | 91.6 (75.9 to 105.3) | 88.5 (70.1 to 104.8) | 97.6 (81.2 to 114.1) | 93.2 (75.0 to 110.6) |
| eGFR (creatinine-based 2021 CKD-EPI), mL/min/1.73 m2 | ||||
| Mean (SD) | 93.3 (22.9) | 89.7 (26.4) | 96.5 (17.1) | 90.8 (27.9) |
| Median (IQR) | 96.4 (80.7 to 109.1) | 93.1 (74.4 to 108.6) | 101.8 (85.9 to 116.9) | 97.1 (78.8 to 113.9) |
| Difference in eGFR (2009no race–2009), mL/min/1.73 m2 | ||||
| Mean (SD) | 0.0 (0.0) | −13.7 (4.2) | 0 (0) | −13.9 (4.5) |
| Median (IQR) | 0.0 (0.0-0.0) | −14.1 (−16.7 to −11.1) | 0 (0, 0) | −14.8 (−17.6 to −11.9) |
| Difference in eGFR (2021–2009), mL/min/1.73 m2 | ||||
| Mean (SD) | 3.9 (1.5) | −10.1 (4.9) | 3.8 (1.1) | −10.3 (5.0) |
| Median (IQR) | 4.2 (3.2 to 5.0) | −9.4 (−13.0 to −6.8) | 3.7 (2.6 to 4.6) | −10.9 (−14.6 to −7.8) |
Note: UW entries are mean (SD) or median (IQR), as indicated; NHANES entries are weighted mean (SD) or median (IQR), as indicated.
Abbreviations: CKD-EPI, Chronic Kidney Disease Epidemiology Collaboration; eGFR, estimated glomerular filtration rate; IQR, interquartile range; NHANES, National Health and Nutrition Examination Survey; SD, standard deviation; UW, University of Washington.