Table 2.

Incidence rates of stroke at 1 and 2 year follow-up in the KorAHF study population, stratified according to prior diagnosis of atrial fibrillation

Characteristics	At 1 year follow-up				At 2 year follow-up
	With AF (n = 2091)		Without AF (n = 3067)		With AF (n = 2091)		Without AF (n = 3067)
	Patients (%)	IR	Patients (%)	IR	Patients (%)	IR	Patients (%)	IR
Overall	94 (4.5)	5.74	86 (2.8)	3.55	116 (5.5)	3.96	103 (3.4)	2.37
Age, years
< 40	1 (2.2)	2.59	2 (0.9)	1.02	1 (2.2)	1.43	2 (0.9)	0.55
40–49	1 (1.0)	1.25	9 (3.7)	4.55	2 (2.0)	1.34	9 (3.7)	2.43
50–59	11 (4.7)	5.63	9 (2.2)	2.59	12 (5.1)	3.30	12 (3.0)	1.85
60–69	16 (4.0)	4.83	17 (2.8)	3.49	18 (4.5)	2.94	23 (3.8)	2.59
70–79	34 (4.3)	5.38	30 (3.2)	4.12	44 (5.5)	3.91	37 (3.9)	2.87
≥ 80	31 (6.1)	8.62	19 (2.9)	4.10	39 (7.6)	6.43	20 (3.1)	2.56
Sex
Male	41 (3.8)	4.89	55 (3.3)	4.20	52 (4.9)	3.44	65 (3.9)	2.74
Female	53 (5.2)	6.63	31 (2.2)	2.79	64 (6.2)	4.53	38 (2.7)	1.93
CHA2DS2-VASc score
1 (HF only)	6 (4.3)	5.29	7 (3.3)	4.00	7 (5.1)	3.32	7 (3.3)	2.13
2	9 (3.2)	3.79	4 (0.8)	0.93	9 (3.2)	2.03	5 (1.0)	0.62
3	9 (2.6)	3.19	16 (3.3)	4.04	14 (4.1)	2.69	18 (3.7)	2.47
4	21 (5.0)	6.61	14 (2.6)	3.26	21 (5.0)	3.71	21 (3.9)	2.73
5	18 (4.3)	5.66	17 (2.9)	3.82	22 (5.2)	3.90	20 (3.4)	2.56
6	14 (5.1)	6.91	16 (3.8)	5.04	22 (7.9)	6.36	17 (4.0)	3.07
≥ 7	17 (7.7)	10.27	12 (3.8)	5.32	21 (9.5)	7.65	15 (4.7)	3.91

Incidence rates per 100 person-years

Abbreviations: AF atrial fibrillation, IR incidence rate