Table 2.

Prevalence and characteristics of CAS in urban and rural populations.

		Total	Urban	Rural	p values
		(N = 30,175)	(N = 14461)	(N = 15714)
CAS		16,454 (54.5%)	8,166 (56.5%)	8,288 (52.7%)	<0.001
IMT thickening		11,835 (39.2%)	6,141 (42.5%)	5,694 (36.2%)	<0.001
Plaque formation		12,448 (41.3%)	6,330 (43.8%)	6,118 (38.9%)	<0.001
Stenosis		1,221 (4.1%)	667 (4.6%)	554 (3.5%)	<0.001
Stenosis rate	1–49%	1,051 (3.5%)	590 (4.1%)	461 (2.9%)	<0.001
	50–69%	75 (0.3%)	30 (0.2%)	45 (0.3%)
	70–99% or	95 (0.3%)	47 (0.3%)	48 (0.3%)
	occlusive

CAS, carotid atherosclerosis; IMT, intima-media thickness.