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Table 2 Baseline Coronary Disease Factors and Revascularization Status of Non-Smokers Undergoing Enhanced External Counterpulsation

From: Passive tobacco exposure may impair symptomatic improvement in patients with chronic angina 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  
  1. Values are expressed as mean ± SD or percentage