TABLE 2] Mean Responses to Individual Dyspnea Questions
Questions About Dyspnea From CAT and SGRQ
Control Group
(n ¼ 231)
Normal Spirometry
Group (n ¼ 2,090)
Asthma Group
(n ¼ 265)
COPD Group
(n ¼ 330)
PRISm Group
(n ¼ 172)
Q1 (weight¼ 0.514) When I walk up a hill or one ﬂight of stairs, I am
breathless.
The scale for this question ranges from 0 (when I walk
up a hill or 1ﬂight of stairs, I am not breathless) to 5
(when I walk up a hill or oneﬂight of stairs, I am very
breathless).
0.90 (1.04) 2.85 (1.46) 3.03 (1.37) 3.21 (1.30) 3.56
(1.37)
Q2 (weight¼ 0.436) Over the past 3 mo, I have had shortness of breath .
The scale for this question ranges from 0 (over the past
3 mo, I have had shortness of breath.not at all) to 4
(over the past 3 mo, I have had shortness ofbreath.most days a week).
0.45 (0.89) 2.50 (1.30) 2.71 (1.18) 2.83 (1.21) 2.93
(1.18)
Q3: I feel breathless these days.
Sitting or lying still, % 3 16 23 14 19Getting washed or dressed, % 2 17 21 20 28Walking around at home, % 2 20 21 23 27Walking outside on the level, % 4 36 42 38 49
Climbing up aﬂight of stairs, % 20 75 81 83 87
Climbing hills, % 35 83 89 90 89Playing sports or games, % 34 78 83 81 82
Q3 (total) (weight¼ 0.648) The scale for this question ranges from 0 to 7, based on
the number of positive answers for the 7 items.
1.00 (1.25) 3.23 (1.72) 3.55 (1.63) 3.45 (1.61) 3.76
(1.75)
Q4 (weight¼ 0.091) I am breathless when I talk, % 2 35 43 37 39
Q5 (weight¼ 0.095) I am breathless when I bend over, % 5 37 45 37 56
Q6 (weight¼ 0.060) I get afraid or panic when I cannot get my breath, % 4 30 33 31 37
Because of my breathing.
Q7 (weight¼ 0.037) I take a long time to get washed or dressed, % 1 8 9 10 17
Q8 (weight¼ 0.023) I cannot take a bath or shower, or I take a long time, % 0 5 7 7 8
Q9 (weight¼ 0.116) I walk slower than other people, or I have to stop for
rests, %
54 04 6 5 6 6 6
Q10 (weight¼ 0.113) Jobs such as housework take a long time, or I have to
stop for rests, %
33 84 0 4 8 5 9
Q11 (weight¼ 0.124) If I climb up one ﬂight of stairs, I have to go slowly or
stop, %
54 74 4 5 7 6 7
Q12 (weight¼ 0.127) If I hurry or walk fast, I have to stop or slow down 10 59 62 70 80
(Continued)
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