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Table 1 Comparison of patients depending on whether they received preoperative respiratory physiotherapy or not.

From: Respiratory physiotherapy and incidence of pulmonary complications in off-pump coronary artery bypass graft surgery: an observational follow-up study

  Preoperative physiotherapy  
  Yes No  
  Mean SD Mean SD p
Age (years) 65.9 9.6 67.1 9.1 0.35
Body Mass Index (BMI) (kg/m 2 ) 27.6 3.3 27.9 3.7 0.43
Creatinine (mg/dL) 1.1 0.3 1.1 0.3 0.68
Affected vessels 2.9 0.7 2.9 0.7 0.77
Ejection fraction (%) 59.7 14.2 59.7 14.7 0.99
Number of cigarettes smoked per day 23.3 13.7 20.0 12.7 0.64
Age at smoking initiation (years) 19.17 5.0 19.0 3.0 0.57
Years as a smoker 33.5 11.8 28.7 13.4 0.13
O2 saturation (%) 96.5 1.69 97.0 1.41 0.79
  n % n % p
Sex      0.29
   Male 132/159 83.0% 81/104 77.9%  
   Female 27/159 17.0% 23/104 22.1%  
Dyslipidemia 106/159 66.7% 61/104 58.7% 0.19
Current exposure to tobacco 13/159 8.2% 5/104 4.8% 0.56
Diabetes Mellitus 51/158 32.3% 33/104 31.7% 0.93
  1. SD: standard deviation