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Table 1 Characteristics of the study population.

From: Health status in routine clinical practice: validity of the clinical COPD questionnaire at the individual patient level

   Number (%) Mean (± SD) IQR (25th-75th)
Gender Male 32 (72.7)    
  Female 12 (27.3)    
Age (years)     66.1 (7.4)  
Marital status Married 33 (75.0)    
  Not Married 7 (15.9)    
  Divorced 1 (2.4)    
  Widow 3 (6.8)    
Educational level No primary school 3 (6.8)    
  Primary school 10 (22.7)    
  High school 24 (54.5)    
  College/University 5 (11.4)    
  Missing 2 (4.5)    
Pack years     29.3 * (15.7-46.8)
FEV1 % predicted     44.8 (13.8)  
Tiffenau     41.2 11.1  
GOLD stage I 0 (0.0)    
  II 13 (29.5)    
  III 26 (59.1)    
  IV 5 (11.4)    
BODE score     2.9 (1.8)  
CCQ Total score     2.2 (0.9)  
Current exacerbation   5 (11.4)    
  1. IQR: Inter Quartile Range, FEV1: Forced Expiratory Flow in one second