Genome-wide association studies and cross-population meta-analyses investigating short and long sleep duration.

Austin-Zimmerman, Isabelle; Levey, Daniel F; Giannakopoulou, Olga; Deak, Joseph D; Galimberti, Marco; Adhikari, Keyrun; Zhou, Hang; Denaxas, Spiros et al. · Nat Commun · 2023

other · Level V

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Abstract

Sleep duration has been linked to a wide range of negative health outcomes and to reduced life expectancy. We present genome-wide association studies of short ( ≤ 5 h) and long ( ≥ 10 h) sleep duration in adults of European (N = 445,966), African (N = 27,785), East Asian (N = 3141), and admixed-American (N = 16,250) ancestry from UK Biobank and the Million Veteran Programme. In a cross-population meta-analysis, we identify 84 independent loci for short sleep and 1 for long sleep. We estimate SNP-based heritability for both sleep traits in each ancestry based on population derived linkage disequilibrium (LD) scores using cov-LDSC. We identify positive genetic correlation between short and long sleep traits (r<sub>g</sub> = 0.16 ± 0.04; p = 0.0002), as well as similar patterns of genetic correlation with other psychiatric and cardiometabolic phenotypes. Mendelian randomisation reveals a directional causal relationship between short sleep and depression, and a bidirectional causal relationship between long sleep and depression.

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