The study categorized sleep duration into three groups: short (< 6 hours/night), normal (6–8 hours/night), and long (> 8 hours/night).

Authors

• Person: Not available Organization: Nature
  U shaped association between sleep duration and long ...

Sources

• U shaped association between sleep duration and long ... www.nature.com Nature via serper

Referenced by nodes (2)

• sleep duration concept
• short sleep concept