Table 3.

The incidence rate of significant ACAS increased with the age of the patients

Age	ACAS (%)a		Total number	P-valueb	Odds ratios (95% confidence interval)
	Non-significant	Significant
50–59	38 (90.5%)	4 (9.5%)	42	0.016*	0.343 (0.129–0.910)
60–69	62 (77.5%)	18 (22.5%)	80	0.785	0.945 (0.627–1.425)
≥ 70	53 (68.0%)	25 (32.1%)	78	0.023*	1.536 (1.087–2.169)
Total number	153	47	200

ACAS Asymptomatic carotid artery stenosis

*Significant P-value

^aχ² = 7.78, P = 0.020; Spearman’s rho = 0.194, P = 0.006

^bAfter Bonferroni correction α’ = 0.017