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Table 4 Presence of atelectasis according to different variables

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

  Atelectasis  
  Yes No  
  Mean SD Mean SD p
Age (years) 66.0 9.8 66.7 9.2 0.62
Creatinine Clearance (MDRD) (mL/min/1.73 m 2 ) 77.4 24.4 75.0 22.1 0.53
Creatinine Clearance (Cockcroft-Gault) (mL/min) 75.9 22.1 73.5 24.2 0.54
Body Mass Index (BMI) (kg/m 2 ) 27.7 3.4 27.7 3.5 0.97
Ejection fraction (%) 56.3 16.4 60.9 13.5 0.08
Prior peak expiratory flow (PEF) (L/min) 454.8 121.1 447.7 126.8 0.80
  n % n % p
Sex      0.02
   Male 46/210 21.9% 164/210 78.1%  
   Female 18/48 37.5% 30/48 62.5%  
NYHA      0.01
   1 2/4 50.0% 2/4 50.0%  
   2 4/24 16.7% 20/24 83.3%  
   3 2/26 7.7% 24/26 92.3%  
   4 3/3 100.0% 0/3 0.0%  
COPD      0.34
   Yes 5/14 33.3% 9/14 66.7%  
   No 59/242 24.4% 183/183 75.6%  
Current smoker      0.90
   Yes 4/17 23.5% 13/17 76.5%  
   No 60/241 24.8% 182/241 75.2%  
Postoperative pain      0.55
   Yes 52/215 24.2% 163/215 75.8%  
   No 12/42 28.6% 30/42 71.4%  
  1. SD: standard deviation; NYHA: New York Heart Association (NYHA) Functional Classification; COPD: Chronic Obstructive Pulmonary Disease