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Table 1 Subject characteristics

From: Health-related quality of life, utility, and productivity outcomes instruments: ease of completion by subjects with COPD

Number 174
Women / men 70 / 104
Age, years  
   Mean ± SD 64.3 ± 12
   Range 28–80
FEV1, L  
   Mean ± SD 1.76 ± 0.78
   Range 0.46 – 4.12
FEV1, % pred  
   Mean ± SD 62 ± 20
   Range 18–118
GOLD classification  
   Number of subjects:  
   Stage I 19
   Stage IIA 82
   Stage IIB 32
   Stage III 9