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Table 1 Descriptive statistics for the Swedish translated PROMIS Pediatric item banks Pain Interference v.2.0., Pediatric Fatigue v.2.0., and Pediatric Physical Activity v.1.0

From: Psychometrics of three Swedish physical pediatric item banks from the Patient-Reported Outcomes Measurement Information System (PROMIS)®: pain interference, fatigue, and physical activity

Items Total sample N = 681 Response Category Frequencies
Mean SD rit c α-i 1 2 3 4 5
Pain interference total scale 29.24 14.28        
1. I felt angry when I had pain … 1.58 0.98 0.70 0.97 458 102 85 20 16
2. I had trouble doing schoolwork when I had pain … 1.68 1.08 0.82 0.97 443 94 90 30 24
3. I had trouble sleeping when I had pain… 1.65 1.06 0.80 0.97 448 100 81 30 22
4. It was hard for me to pay attention when I had pain … 1.69 1.08 0.84 0.97 435 97 94 34 21
5. It was hard for me to run when I had pain … 1.79 1.18 0.76 0.97 416 99 93 37 36
6. It was hard for me to walk one block when I had pain … 1.39 0.82 0.80 0.97 523 80 56 13 9
7. It was hard to have fun when I had pain… 1.57 1.01 0.82 0.97 477 83 75 29 17
8. It was hard to stay standing when I had pain … 1.46 0.93 0.84 0.97 513 74 57 24 13
9. I hurt a lot … 1.59 0.97 0.82 0.97 452 111 80 23 15
10. I hurt all over my body… 1.42 0.84 0.74 0.97 509 93 55 15 9
11. I missed school when I had pain … 1.31 0.69 0.77 0.97 542 82 46 7 4
12. It was hard for me to remember things when I had pain … 1.32 0.76 0.79 0.97 547 78 39 7 10
13. It was hard to get along with other people when I had pain … 1.32 0.73 0.80 0.97 542 78 45 11 5
14. It was hard for me to be away from home because I had pain … 1.33 0.75 0.83 0.97 546 70 48 11 6
15. It was hard to have fun with friends because I was in pain… 1.37 0.80 0.84 0.97 531 77 50 16 7
16. I needed help walking when I was in pain … 1.21 0.61 0.71 0.97 592 51 28 6 4
17. I walked carefully when I was in pain… 1.49 0.95 0.75 0.97 496 88 60 21 16
18. I had so much pain I had to stop what I was doing… 1.39 0.82 0.81 0.97 528 71 58 19 5
19. My pain was so bad that I needed to take medicine to treat it… 1.41 0.89 0.67 0.97 529 69 50 20 13
20. It was hard to do things with my family because I had pain … 1.27 0.71 0.78 0.97 571 59 34 10 7
Fatigue total scale 52.63 22.77        
1. Being tired made it hard for me to keep up with my schoolwork… 2.36 1.27 0.78 0.97 235 152 159 84 51
2. Being tired made it hard for me to play or go out with my friends as much as I'd like… 1.86 1.11 0.73 0.97 364 134 117 44 22
3. I felt weak… 2.04 1.16 0.74 0.97 306 154 135 60 26
4. I got tired easily… 2.74 1.32 0.74 0.97 163 139 167 135 77
5. I had trouble finishing things because I was too tired… 2.39 1.27 0.79 0.97 233 139 169 93 47
6. I had trouble starting things because I was too tired… 2.52 1.32 0.79 0.97 219 125 163 115 59
7. I was so tired it was hard for me to pay attention… 2.31 1.22 0.81 0.97 246 133 177 93 32
8. I was too tired to do sports or exercise… 2.11 1.28 0.72 0.97 304 154 119 49 55
9. I was too tired to do things outside… 1.84 1.08 0.79 0.97 365 142 104 58 12
10. I was too tired to enjoy the things I like to do… 1.89 1.10 0.80 0.97 353 132 133 45 18
11. I felt tired even when I had not done anything… 2.29 1.30 0.81 0.97 274 118 150 93 46
12. It was hard for me to get out of bed in the morning because I was too tired … 2.81 1.44 0.68 0.97 184 114 143 25 115
13. I felt too tired to spend time with my friends… 1.85 1.06 0.77 0.97 347 160 118 39 17
14. I felt more tired than usual when I woke up in the morning… 2.31 1.30 0.74 0.97 260 135 159 71 56
15. I felt tired… 3.02 1.36 0.73 0.97 138 95 176 156 116
16. I needed to sleep during the day… 2.15 1.31 0.64 0.97 315 121 132 55 58
17. I was too tired to watch television… 1.63 0.97 0.68 0.97 433 118 93 26 11
18. I was too tired to eat… 1.50 0.91 0.66 0.97 488 86 77 20 10
19. I was too tired to take a bath or shower… 1.70 1.05 0.71 0.97 424 111 90 41 15
20. I was so tired it was hard for me to focus on my work… 2.31 1.25 0.83 0.97 252 134 174 77 44
21. Being tired kept me from having fun… 1.72 1.02 0.80 0.97 401 134 97 36 13
22. I was too tired to go up and down a lot of stairs… 1.59 1.03 0.68 0.97 464 106 60 28 23
23. I was too tired to go out with my family… 1.58 0.97 0.71 0.97 451 124 65 25 16
24. I was too tired to read… 2.15 1.28 0.74 0.97 310 121 134 72 44
25. Being tired made it hard for me to remember things… 1.97 1.17 0.80 0.97 339 133 123 61 25
Physical activity total scale 29.73 9.07        
1. How many days did you exercise so much that you breathed hard? 2.93 1.15 0.84 0.92 102 107 267 145 60
2. How many days did you play sports for 10 min or more? 3.32 1.18 0.77 0.93 67 75 237 179 123
3. How many days were you so physically active that you sweated? 3.10 1.12 0.84 0.93 74 102 259 173 73
4. How many days did you exercise or play so hard that your body got tired? 2.87 1.13 0.85 0.92 105 112 278 135 51
5. How many days did you exercise or play so hard that your muscles burned? 2.49 1.09 0.76 0.93 153 184 224 96 24
6. How many days did you exercise or play so hard that you felt tired? 2.75 1.14 0.78 0.93 123 135 258 121 44
7. On a usual day. how physically active were you? 3.31 1.03 0.63 0.93 23 145 188 249 76
8. How many days did you exercise really hard for 10 min or more? 2.73 1.18 0.81 0.93 133 138 238 122 50
9. How many days were you physically active for 10 min or more? 3.72 1.16 0.52 0.94 38 56 187 178 222
10. How many days did you run for 10 min or more? 2.50 1.21 0.66 0.93 189 141 209 103 39
  1. M mean, SD standard deviation, ritc corrected item-total correlation, α-i ordinal alpha if the item is removed