Table 1.

Patient Characteristics.

Characteristics	ISR (n = 78)	Control(n = 130)		χ2/t	P
		non-ISR (n = 68)	Healthy (n = 62)
Gender male	67(85.9%)	53(77.9%)	50(80.6%)	1.451	0.228
Age, years	66.32 ± 7.70	65.46 ± 13.80	67.01 ± 4.80	0.035	0.851
Smoking	30(38.5%)	35(51.5%)	20(32.3%)	0.298	0.585
Diabetes	56(71.8%)	47(69.1%)	31(50%)	2.959	0.085
Hypertension	46(59.0%)	40(58.8%)	37(59.7%)	0.001	0.971
Atrial fibrillation	4(5.1%)	3(4.4%)	3(4.8%)	0.028	0.867
CAD	18(23.1%)	16(23.5%)	12(19.4%)	0.067	0.796
Cerebral infarction	10(12.8%)	3(4.4%)	8(12.9%)	1.020	0.312
COPD	5(6.4%)	3(4.4%)	2(3.2%)	0.700	0.403
Cholesterol, mmol/L	4.31 ± 1.05	4.47 ± 1.12	4.57 ± 1.54	0.972	0.325
LDL, mmol/L	2.38 ± 0.85	2.49 ± 0.99	2.21 ± 0.85	0.713	0.399
HDL, mmol/L	1.03 ± 0.40	1.10 ± 0.26	1.12 ± 0.38	2.896	0.090

Abbreviations: CAD, Coronary artery disease; COPD, Chronic Obstructive Pulmonary Disease; LDL, Low Density Lipoprotein; HDL, High Density Lipoprotein.

Continuous data are presented as the means ± standard deviation;

Categorical data are given as the counts (percentage).