Domain/item | Infit index | Item difficulty (SE) | Reliability (separation index) |
---|---|---|---|
Symptoms domain | 0.59 (1.21) | ||
S_a5. Very bad unpleasant attacks of chest troubleb | 0.85 | −1.09 (0.06) | |
S_a4. Attacks of wheezing | 0.87 | −0.18 (0.06) | |
S_a3. Shortness of breath | 0.90 | 0.09 (0.05) | |
S_a7. How many good days (with little chest trouble) | 1.46a | 0.23 (0.06) | |
S_a1. Coughed | 0.87 | 0.47 (0.06) | |
S_a2. Brought up phlegm (sputum) | 1.08 | 0.47 (0.06) | |
Activity domain | 0.86 (2.50) | ||
A_c1. Sitting or lying still | 1.40 | −6.42 (0.46) | |
A_c2. Getting washed or dressed | 0.93 | −3.53 (0.24) | |
A_g1. Take a long time to get washed or dressed | 1.08 | −3.14 (0.23) | |
A_g2. Cannot take a bath or shower, or take a long time | 0.90 | −2.84 (0.22) | |
A_c3. Walking around the home | 0.86 | −2.56 (0.21) | |
A_c4. Walking outside on the level | 0.82 | −1.39 (0.20) | |
A_g3. I walk more slowly than other people, or I stop for rests | 1.09 | −0.67 (0.19) | |
A_g4. Jobs such as housework take a long time, or I have to stop for rests | 0.81 | 0.04 (0.19) | |
A_c5. Walking up a flight of stairs | 0.92 | 0.38 (0.20) | |
A_g5. If walk up one flight of stairs, I have to go slowly or stop | 0.78 | 0.61 (0.20) | |
A_c7. Playing sports or games | 1.42a | 2.54 (0.24) | |
A_g7. Walk up hills, carry things up stairs or play golf | 0.80 | 2.71 (0.24) | |
A_c6. Walking up hills | 1.35 | 2.77 (0.24) | |
A_g6. If hurry or walk fast, I have to stop or slow down | 0.86 | 2.96 (0.25) | |
A_g8. Carry heavy loads, jog or walk at 5 miles per hour or swim | 0.69 | 4.07 (0.30) | |
A_g9. Very heavy manual work, run, cycle, play competitive sports | 0.86 | 4.46 (0.32) | |
Impact domain | 0.81 (2.08) | ||
I_h5. Move far from my bed or chair | 0.94 | −1.87 (0.26) | |
I_f2. I get embarrassed using my medication in public | 1.13 | −1.30 (0.22) | |
I_f1. My medication does not help me very much | 1.25 | −1.30 (0.22) | |
I_e5. I do not expect my chest to get any better | 0.90 | −0.91 (0.20) | |
I_d3. I get breathless when I talk | 0.76 | −0.72 (0.19) | |
I_d4. I get breathless when I bend over | 0.84 | −0.62 (0.19) | |
I_h3. Go out of the house to do the shopping | 0.88 | −0.54 (0.18) | |
I_f3. I have unpleasant side effects from my medication | 1.17 | −0.54 (0.18) | |
I_f4. My medication interferes with my life a lot | 1.07 | −0.51 (0.18) | |
I_h4 Do housework | 0.87 | −0.50 (0.18) | |
I_d1. My cough hurts | 0.87 | −0.45 (0.18) | |
I_e2. My chest trouble is a nuisance to my family, friends or neighbors | 0.99 | −0.35 (0.18) | |
I_b2. Chest trouble affect my work | 1.21 | −0.20 (0.12) | |
I_e3. I get afraid or panic when I cannot get my breath | 0.96 | −0.17 (0.17) | |
I_i. Best describes how your chest affects youb | 0.98 | −0.13 (0.10) | |
I_e4. I feel that I am not in control of my chest problem | 0.89 | −0.11 (0.17) | |
I_h2. Go out for entertainment or recreation | 0.80 | 0.15 (0.16) | |
I_e1. My cough or breathing is embarrassing in public | 1.16 | 0.24 (0.16) | |
I_d2. My cough makes me tired | 0.94 | 0.88 (0.15) | |
I_d5. My cough or breathing disturbs my sleep | 1.13 | 0.93 (0.15) | |
I_h1. Play sports or games | 0.88 | 1.11 (0.15) | |
I_b1. How would you describe your chest condition | 2.00a | 1.15 (0.08) | |
I_d6. I get exhausted easily | 0.90 | 1.19 (0.15) | |
I_e6. I have become frail or an invalid because of my chest | 0.74 | 1.21 (0.15) | |
I_e8. Everything seems too much of an effort | 0.76 | 1.62 (0.15) | |
I_e7. Exercise is not safe for me | 0.89 | 1.75 (0.16) |