Principal component comparisons (P-values) between cases and controls based on the Wilcoxon rank-sum test.

Note: For each case-control combination, the Wilcoxon rank-sum tests are based on principal components estimated with 12,898 population structure inference SNPs.aPLCOca-PLCOco is the original PLCO prostate cancer study.bPLCOca-NHSco is the reconstructed study with prostate cancer cases from the PLCO, and external controls from NHS.cNHSca-NHSco is the original NHS breast cancer study.dNHSca-PLCOco is the reconstructed study with breast cancer cases from the NHS, and external controls from PLCO.