Insomnia and short sleep duration, but not chronotype, is associated with chronic widespread pain: Mendelian randomization study.

This study suggest that insomnia and short sleep duration (≤6 hours) are associated with an increased risk of CWP. Improving short sleep duration and insomnia, rather than chronotype, may be effective in reducing the risk of CWP, although these results should be replicated in epidemiological and interventional studies.