Researchers have quantified the contribution genetics makes to sleep quality variation in a twin study of middle-aged men.
They found that additive genetic effects explained 34% of the variability in individual sleep quality, while 66% was attributed to individual-specific environmental factors.
Common environmental factors made no contribution, however, report the researchers, led by Brinda Rana (University of California, San Diego, USA).
Read the full, original story here: Genes play meaningful role in sleep quality
