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Table 1 Baseline characteristics of the study population

From: Health related quality of life trajectories and predictors following coronary artery bypass surgery

Demographic Mean (SD) %
   Age 65.5 (9.8)  
   Male sex    80
   Currently in workforce    33
   Currently has partner    74
   Non-manual occupation    52
   Years education 10.9 (2.5)  
   English main language spoken    85
   Australian born    60
   Lives with others    82
Cardiovascular disease risk factors    
   Hypertension    86
   Diabetes mellitus    29
   Cerebrovascular disease    14
   Peripheral vascular disease    14
   Chronic obstructive pulmonary disease    11
   Past smoker    32
   Current smoker    10
   Body mass index 28.9 (4.6)  
Cardiac    
   Previous cardiac surgery    11
   Previous myocardial infarction    48
   Family history of coronary artery disease    40
   New York Heart Association functional class    
I    28
II    42
III    28
IV    2
   Reduced ejection fraction (EF < .55)    47
Operational/Post-operational    
New cardiac arrhythmia    29
Red blood cell transfusion post-op    22
Pulmonary blood pressure 19.3 (5.1)  
Number of distal anastomoses 2.9 (1.0)  
Post-operative ventilation hours 8.3 (6.7)  
Total time in intensive care (hours) 33.9 (18.8)  
Length of stay in hospital (days) 7.1 (5.2)  
Readmitted to hospital within 30 days discharge    12
Attended cardiac rehabilitation program    73
Number of cardiac rehabilitation sessions attended 4.6 (3.4)  
Health related quality of life (SF-36)    
Baseline physical component summary 36.6 (10.5)  
Two month physical component summarya 39.2 (8.1)  
Six month physical component summaryb 45.4 (10.4)  
Baseline mental component summary 46.8 (11.2)  
Two month mental component summarya 49.7 (11.0)  
Six month mental component summaryb 50.6 (10.8)  
  1. n = 182
  2. a n = 128
  3. b n = 114