Table 2.

R² and p-values from likelihood ratio test for prediction models using PCs and self-reported European ancestry in in-sample analysis using all samples

		Hair color		Tanning ability		Basal cell carcinomaa
Model		R2	P-valueb	R2	P-valueb	R2	P-valueb
1	Self-reported ancestry	0.0397	<10−16	0.0081	<10−16	0.0072	9.19 × 10−7
2	PC1 + PC2	0.0468	<10−16	0.0146	<10−16	0.0036	5.01 × 10−4
3	PC1 + … + PC5	0.0724	<10−16	0.0350	<10−16	0.0202	1.93 × 10−15
4	PC1 + … + PC5 + self-reported ancestry	0.0779	1.32 × 10−9	0.0363	5.70 × 10−3	0.0213	1.81 × 10−1

^aR² on liability scale

^bP-values are from likelihood ratio tests comparing model 1 and 2 to the null model, model 3 to model 2, and model 4 to model 3.