Table 4. Baseline characteristics of the validation cohort.

	Total, n = 83	AF (＋), n = 24	AF (－), n = 59	P
Age, y	74 (62 – 79)	77.5 (70.8 – 80.8)	70 (60 – 77)	0.010
Female sex	36 (43)	10 (42)	26 (44)	0.84
National Institutes of Health Stroke Scale score	2 (0 – 6)	3 (1 – 9.25)	1 (0 – 4)	0.026
Day of implantation after stroke onset, d	48 (19 – 107)	31 (15.5 – 62.8)	59 (21 – 115)	0.045
Day of follow-up after implantation ＊ , d	205 (68 – 548)	71 (14.5 – 138.5)	318 (142 – 628)	＜0.001
Brain natriuretic peptide (BNP), pg/mL	42.2 (13.9 – 100.7)	112.2 (46.8 – 199.9)	24.9 (10.9 – 55.4)	＜0.001
Left atrial dimeter on echocardiography, mm	35 (32 – 39)	38 (33 – 42)	34 (31 – 38)	0.030
Atrial premature contractions (APCs) on 24-hour Holter electrocardiography, /24 h	97 (19 – 352)	684.5 (125 – 3395)	53 (15 – 180)	＜0.001
APC short runs, /24 h	2 (0 – 7)	9 (1 – 19.5)	1 (0 – 4)	＜0.001

N (%) or median (IQR)

^＊ Follow-up completed when atrial fibrillation was detected.