Baseline characteristics
The total number of patients with AF included in our consecutive cross-sectional analyses ranged from 9,874 from 169 practice sites in 2009 to 41,751 from 429 practice sites in 2018. The mean age (standard deviation) of patients with AF increased slightly from 75.1 (11.6) years in 2009 to 76.0 (11.6) years in 2018. The proportion of male patients increased from 51.4% (95% CI 50.4%-52.4%) in 2009 to 54.5% (95% CI 54.0%-55.0%) in 2018 (p for trend <0.001; Table 1).