Arrhythmias & electrophysiologyCohort study
Timing of stroke risk reassessment in atrial fibrillation patients with a CHA2DS2-VA score of 0 or 1: the Norwegian AFNOR study
- Retrospective cohort study
- Norwegian national registries
Authors' conclusion
New risk factors emerged in half of AF patients within 1.7 years.
Study context
- Population
- Adults ≥18 years with incident atrial fibrillation (AF) and a low (0) or intermediate (1) CHA2DS2-VA score, Norway 2011–18
- Participants
- 40,782 adults
- Exposure
- 18-44 years vs 45-54 years vs >55 years
- Outcome
- Increase in the CHA2DS2-VA score after AF diagnosis
Main finding
As reported in the abstract
Proportion with increased CHA2DS2-VA score
Increased score at 6 months
19%
Increased score at 1 year
25%
Increased score at 3 years
40%
Observational data: associations, not effects.
Further findings
New risk factor and number needed to reassess, by age group · 1 year
Number needed to reassess 18-44 years 12 · 45-54 years 7 · >55 years 3
Original publication
Timing of stroke risk reassessment in atrial fibrillation patients with a CHA2DS2-VA score of 0 or 1: the Norwegian AFNOR study. Europace. Published 24 July 2025. doi:10.1093/europace/euaf145
Summarised from the published abstract; every number is checked against it