Table 2.

Summary of SNP-heritability estimates (liability scale) for the AFR population, derived using LD scores calculated using cov-LDSC, based on either UKB or MVP samples

SNP-h2 (SE); p-value	Short sleep using UKB-derived cov-LDSC scores	Short sleep using MVP-derived cov-LDSC scores	Long sleep using UKB-derived cov-LDSC scores	Long sleep using MVP-derived cov-LDSC scores
UK Biobank only	0.018 (0.23); 0.94	0.050 (0.158); 0.75	−0.47 (0.58); 0.42	−0.94 (0.41); 0.022
MVP only	0.14 (0.05); 0.012	0.077 (0.031); 0.012	−0.12 (0.30); 0.69	−0.048 (0.20); 0.81
UKB + MVP meta-analysis	0.088 (0.04); 0.039	0.075 (0.026); 0.0042	0.012 (0.19); 0.95	0.040 (0.12); 0.74