Table 2.

Incidence per 1000 Person‐Years and Hazard Ratios of AF After Stroke

	No. of Patients	No. with AF	Days at Risk	Incidence/1000 y	RR	95% CI	RR1 a	95% CI	RR2 b	95% CI
C (CHF)
No	52972	2432	43891162	20.22	1.00		1.00		1.00
Yes	4664	337	2651748	46.39	2.22	1.98–2.48	1.89	1.68–2.12	1.83	1.63–2.06
H (HT)
No	26608	1054	21753369	17.71	1.00		1.00		1.00
Yes	31028	1715	24789541	25.29	1.42	1.32–1.53	1.38	1.28–1.49	1.36	1.26–1.47
A75 (age ≥75 y)
No	26539	910	24675067	13.48	1.00		1.00		1.00
Yes	31097	1859	21867843	31.07	2.26	2.08–2.44	2.13	1.97–2.31	2.39	2.06–2.77
									3.52	3.07–4.04
									4.34	3.72–5.06
D (DM)
No	45501	2230	37116918	21.96	1.00		1.00		1.00
Yes	12135	539	9425992	20.90	0.95	0.86–1.04	0.88	0.80–0.97	0.88	0.80–0.97
S (stroke)
No	43272	2056	35540442	21.14	1.00		1.00		1.00
Yes	14346	713	11002468	23.69	1.11	1.02–1.21	0.99	0.91–1.08	0.96	0.88–1.05
Sex
F	27761	1443	21877385	24.11	1.00		1.00		1.00
M	29875	1326	24665525	19.65	0.82	0.76–0.88	0.94	0.87–1.02	0.97	0.90–1.05
CHADS2 score
0	9048	226	8571052	9.64	1.00
1	17258	774	14504221	19.50	2.00	1.73–2.33
2	14335	810	11244789	26.33	2.69	2.32–3.11
3	8853	499	6657935	27.39	2.79	2.38–3.26
4	5847	332	4197717	28.91	2.93	2.47–3.47
5	1993	111	1221588	33.21	3,32	2.64–4.16
6	302	17	145608	42.67	4.16	2.54–6.80

Abbreviations: AF, atrial fibrillation; CHF, congestive heart failure; CI, confidence interval; DM, diabetes mellitus; F, female; HT, hypertension; M, male; RR, relative risk.

^aRR¹: C, H, A75, D, S, and sex included in the model.

^bRR²: C, H, age 4 categories, D, S, and sex included in the model.