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Table 1 Demographic Characteristics and Health Status for Asthma and COPD Sample

From: Development and psychometric assessment of the COPD and Asthma Sleep Impact Scale (CASIS)

Characteristics Focus group/interview sample Cognitive debriefing interview sample Validation sample
  Asthma (n = 55) COPD (n = 43) Asthma (n = 29) COPD
(n = 35)
Asthma (N = 324) COPD (N = 311)
Age(years)       
   Mean (SD) 45.2 (17) 66.0 (11) 49.6 (17) 65.2 (9) 48.1 (16) 70.6 (10)
   Range 22-82 33-91 18-82 48-80 18-85 45-95
Male n (%) 22 (40) 24 (56) 12 (41) 17 (49) 90 (28) 141 (45)
Years since diagnosis       
   Mean (SD) 20.4 (14)a 11.2 (11) 22.3 (16) 11.5 (14) 20.1 (15) 10.5 (11)
   Range 1-68 1-50 1-60 1-60 1-71 1-76
   Missing, n (%) 1 (2) 1 (2) 1 (3) 3 (9)   
Participant-reported disease severity, n (%) b, c       
   Mild 27 (49) 7 (16) 9 (56) 7 (37) 146 (45) 52 (17)
   Moderate 14 (25) 16 (37) 6 (38) 4 (21) 120 (37) 139 (45)
   Quite severe 10 (18) 12 (28) 1 (6) 5 (26) 43 (13) 93 (30)
   Very severe 3 (5) 5 (12) 0 2 (11) 11 (3) 26 (8)
   Missing 1 (2) 3 (7) 0 1 (5)   
Participant-reported overall health, n (%) d       
   Very good 5 (13) 0 2 (13) 0 46 (14) 14 (5)
   Good 14 (36) 12 (41) 8 (50) 6 (32) 144 (44) 78 (25)
   Fair 15 (38) 6 (21) 4 (25) 7 (37) 104 (32) 137 (44)
   Poor 5 (13) 11 (38) 2 (13) 6 (32) 27 (8) 78 (25)
SGRQ e Mean (SD)       
   Symptom score --- --- --- --- --- 57.7 (22.2)
   Activity score       73.3 (23.3)
   Impacts score       43.6 (25.0)
   Total score       54.7 (21.7)
AQLQ f Mean (SD)       
   Symptoms --- --- --- --- 4.7 (1.4) ---
   Activity limitation      5.0 (1.4)  
   Emotional function      4.9 (1.6)  
   Environmental stimuli      4.6 (1.6)  
   Overall      4.8 (1.3)  
  1. a 3 asthma participants excluded from mean calculation were diagnosed in early childhood/infancy.
  2. b Clinician-reported for focus group asthma and COPD samples (US only)
  3. c Cognitive debriefing interview sample collected in UK only: asthma n = 16; COPD n = 19
  4. d Focus group/interview samples collected in UK only: asthma n = 39; COPD n = 29. Cognitive debriefing interview samples collected in UK only: asthma n = 16; COPD n = 19
  5. e Scores range from 0 to 100 with higher scores reflecting more impairment. COPD participants only.
  6. f Scores range from 1 to 7 with higher scores reflecting more favorable health status. Asthma participants only.