Study Links Irregular Sleep Schedules to Increased Anxiety and Depression
A new study has found a significant correlation between erratic sleep schedules and more severe symptoms of anxiety, depression, and loneliness. Researchers analyzed data from approximately 23,000 individuals, who provided an average of 154 days of sleep data. The study, published on November 12, 2026, in *Scientific Reports*, utilized a Sleep Regularity Index (SRI) ranging from zero to 100, with higher scores indicating more consistent sleep patterns. Participants also completed monthly surveys to track their mental health. The findings indicate that even a half-hour variation in sleep schedules can negatively impact mood. For instance, individuals with severe depression symptoms had an SRI of 75, compared to 84 for those with few to no symptoms. Similarly, those with severe anxiety had an SRI of 79, versus 84 for those with normal anxiety levels. This research highlights the importance of consistent sleep-wake times for mental well-being.