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Table 2 Question to the subject

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

A. You have now completed 5 various questionnaires
  Please indicate on a rating scale scored 1–5 the degree of difficulty to complete them:
  1 = very easy 2 = easy 3 = acceptable
  4 = difficult   5 = very difficult
  1) SF-36 ____  
  2) SGRQ ____  
  3) EQ-5D ____  
  4) WPAI ____  
  5) HS-COPD ____  
To be completed by administrator.
B. Time for completion: ____ min
C. The administrator's opinion of how the subject understands the meaning of the questionnaires
  Good understanding (1)
  Probably understood (2)
  Possibly understood (3)
  Did not understand (4)