Table 1.

Incidence rates of cardiovascular (CV) events in the patients with and without RA (per year, per 1,000 person).

CV event	RA, N	RA, IR [95%CI]	non-RA, N	non-RA, IR [95%CI]	IRR	p-value
Atrial fibrillation	687	7.01 [5.9–8.1]	6,964	5.98 [5.7–6.3]	1.17 [1.1–1.3]	<0.001(***)
Heart failure	402	4.10 [3.2–5.0]	3,546	3.04 [2.8–3.3]	1.35 [1.2–1.5]	<0.001(***)
Myocardial infarction	603	6.15 [5.1–7.2]	5,140	4.41 [4.2–4.7]	1.39 [1.3–1.5]	<0.001(***)
Stroke	228	2.33 [1.7–3.0]	2,464	2.11 [1.9–2.3]	1.10 [1.0–1.3]	0.171

CV, cardiovascular; CI, confidence interval; IR, incidence rate; IRR, incident rate ratio; RA, rheumatoid arthritis; IRR, were adjusted for age, sex, and CV risk factors.

^***Highly significant.