Table 2.

Baseline Coronary Disease Factors and Revascularization Status of Non-Smokers Undergoing Enhanced External Counterpulsation

Variables	No SHS Exposure (n = 918)	SHS Exposure (n = 108)	p-value
Interval since CAD diagnosis (yrs)	11.5 ± 8.7	10.9 ± 8.2	0.69
Prior myocardial infarction (%)	69.9	74.8	0.30
Heart failure (%)	24.5	26.4	0.66
Ischemic cardiomyopathy (%)	35.2	41.1	0.23
Left ventricular ejection fraction (%)	47.3 ± 14.4	45.4 ± 14.7	0.25
Prior PCI or CABG (%)	90.4	85.2	0.091
Angina episodes/week	11.8 ± 15.5	13.0 ± 14.2	0.50
Angina class			0.16
I	2.6	1.9
II	5.1	0.9
III	68.3	70.4
IV	24.0	26.9

Values are expressed as mean ± SD or percentage