Table 3.

Reclassification of CKD stage on the basis of genetic ancestry versus self-reported ancestry

CKD Stage Using Self-Reported Ancestry	CKD Stage Using Genetic Ancestrya
	1	2	3a	3b	4	5
AAsb
1	1414	22
2		1260	10
3a			252	3
3b				108	1
4					46	0
5						73
HAsc
1	1567
2	111	1705
3a		57	386
3b			18	152
4				10	58
5					2	72

^aGFR calculated on the basis of genetic ancestry as follows: regardless of self-reported ancestry, if <50% African ancestry, use CKD-EPI⁹ for not black, and if >50% African, use CKD-EPI for black.

^bTotal number reclassified: 36 (1%).

^cTotal number reclassified: 198 (4.8%).