Table 2.

Incidence rates of atrial fibrillation in patients with gout compared to those with osteoarthritis.

	Gout				Osteoarthritis
Atrial Fibrillation	No. of patients	Cases	Person-years	Incidence rate (95% CI)	No. of patients	Cases	Person-years	Incidence rate (95% CI)	Rate ratio* (95% CI)
In/outpatient diagnosis + anticoagulants/anti-arrhythmics	70,015	1,029	143,185	7.19 (6.76–7.64)	210,045	2,438	415,578	5.87 (5.64–6.11)	1.22 (1.13–1.31)
Inpatient diagnosis	70,015	685	143,856	4.76 (4.42–5.13)	210,045	1,771	416,929	4.25 (4.06–4.45)	1.12 (1.03–1.22)
Inpatient diagnosis + anticoagulants/anti-arrhythmics	70,015	451	144,116	3.13 (2.85–3.43)	210,045	1,186	417,659	2.84 (2.68–3.01)	1.10 (0.99–1.23)

CI: confidence interval, Incidence rate is per 1,000 person-years.

^*matched on age, sex, and index date