Fig. 1.

PCA plots of principal components calculated from Affymetrix genotype data from the 10,179 participants that had UK Biobank PC1 > 100 and PC2 > 0. (a) Participants were classified by whether they have a two-risk-variant APOL1 genotype. (b) Participants were classified by their self-declared ethnicity: Black or Black British participants have UK Biobank ethnicity codes 4001, 4002, or 4003. The vertical line in (a) indicates the cut off used to select participants. Everyone to the right of the line was included.