Arrhythmias & electrophysiologyCohort study
Sleeping and the risk of atrial fibrillation: a prospective study in the SUN cohort
- Prospective cohort study
Authors' conclusion
Prolonged daytime naps and inadequate night sleep duration were significantly associated with a higher risk of AF in a Mediterranean cohort.
Study context
- Population
- Spanish university graduates free of atrial fibrillation (AF) at baseline (SUN Project)retention 91%
- Participants
- 20,827 participants
- Exposure
- Daytime napping and night sleep duration vs reference sleep patterns
- Outcome
- Incident AF, confirmed by a cardiologist
- Follow-up
- Median 15 years
Main finding
As reported in the abstract
Incident AF (163 cases) · median 15 years
Adjusted hazard ratio (95% CI)
Long nap vs Short nap
1.62(1.10–2.39)
No nap vs Short napnot significant
1.32(0.91–1.93)
Inadequate night sleep vs Adequate night sleep
1.89(1.10–3.23)
Observational data: associations, not effects.
Further findings
AF, joint category: long naps and inadequate night sleep
| Comparison | adjusted HR (95% CI) | |
|---|---|---|
| long naps (≥30 min/day) and inadequate nighttime sleep · highest AF risk; threefold increased risk | 3.19 (1.30–7.79) | |
| 0.10.31310Adjusted hazard ratio (log scale) |
Original publication
Sleeping and the risk of atrial fibrillation: a prospective study in the SUN cohort. Eur J Prev Cardiol. Published 24 July 2025. doi:10.1093/eurjpc/zwaf377
Summarised from the published abstract; every number is checked against it