Table 2.
Fit of "activity-participation" item bank to Rasch model (after rescoring) (n = 266)
| Item | Location | SE | Individual Item Fit Residual | Chi-Square Test Statistics | p |
| WHODAS II – 2.1. In the last 30 days, how much difficulty did you have in standing for long periods such as 30 minutes? | 0.132 | 0.116 | 2.141 | 6.255 | 0.100 |
| WHODAS II – 2.2. In the last 30 days, how much difficulty did you have in standing up from sitting down? | 1.846 | 0.152 | -1.500 | 2.695 | 0.441 |
| WHODAS II – 2.3. In the last 30 days, how much difficulty did you have in moving around inside your home? | 2.752 | 0.146 | -0.579 | 3.289 | 0.349 |
| WHODAS II – 2.4. In the last 30 days, how much difficulty did you have in getting out of your home? | 1.907 | 0.162 | -1.600 | 5.242 | 0.155 |
| WHODAS II – 2.5. In the last 30 days, how much difficulty did you have in walking a long distance such as a kilometer (or equivalent)? | 0.110 | 0.114 | -0.115 | 1.716 | 0.633 |
| WHODAS II – 3.1. In the last 30 days, how much difficulty did you have in washing your whole body? | 4.182 | 0.149 | -0.844 | 2.264 | 0.519 |
| WHODAS II – 3.2. In the last 30 days, how much difficulty did you have in getting dressed? | 4.376 | 0.145 | -0.638 | 1.780 | 0.619 |
| WHODAS II – 3.3. In the last 30 days, how much difficulty did you have in eating? | 4.163 | 0.156 | 1.320 | 0.275 | 0.965 |
| WHODAS II – 3.4. In the last 30 days, how much difficulty did you have in staying by yourself for a few days? | 2.540 | 0.130 | 2.009 | 7.187 | 0.066 |
| WHODAS II – 5.3. In the last 30 days, how much difficulty did you have in doing most important households tasks well? | 1.882 | 0.146 | -1.405 | 4.658 | 0.199 |
| WHODAS II – 5.4. In the last 30 days, how much difficulty did you have in getting all the household work done that you needed to do? | -0.038 | 0.115 | -0.758 | 5.290 | 0.152 |
| WHODAS II – 5.5. In the last 30 days, how much difficulty did you have in getting your household work done as quickly as needed? | -0.144 | 0.120 | -0.608 | 2.190 | 0.534 |
| WHODAS II – 6.1. In the last 30 days, how much of a problem did you have in joining in community activities (for example, festivities, religious or other activities) in the same way as anyone else can | 1.911 | 0.119 | 0.471 | 0.456 | 0.928 |
| WHODAS II – 6.2. In the last 30 days, how much of a problem did you have because of barriers or hindrances in the world around you? | 3.722 | 0.142 | 1.391 | 6.266 | 0.099 |
| WHODAS II – 6.8. In the last 30 days, how much of a problem did you have in doing things by yourself for relaxation or pleasure? | 2.115 | 0.141 | -0.986 | 0.793 | 0.851 |
| ODI 4. Walking | 3.082 | 0.106 | 0.361 | 7.119 | 0.068 |
| ODI 6. Standing | 0.651 | 0.104 | 0.447 | 4.730 | 0.193 |
| ODI 9. Social Life | 1.578 | 0.102 | 1.585 | 11.801 | 0.008 |
| ODI 10. Travelling | 0.216 | 0.137 | -1.365 | 1.964 | 0.580 |
| RDQ 1. I stay at home most of the time because of my back | -0.396 | 0.156 | -0.836 | 2.526 | 0.471 |
| RDQ 2. I change position frequently to try to get my back comfortable | -2.904 | 0.274 | -0.207 | 2.106 | 0.551 |
| RDQ 3. I walk more slowly than usual because of my back | -1.705 | 0.198 | -1.807 | 9.433 | 0.024 |
| RDQ 4. Because of my back, I am not doing any jobs that I usually do around the house | -1.064 | 0.173 | -0.307 | 2.586 | 0.460 |
| RDQ 5. Because of my back, I use handrail to get upstairs | -1.862 | 0.205 | -1.482 | 4.863 | 0.182 |
| RDQ 6. Because of my back, I lie down to rest more often | -1.745 | 0.200 | -0.001 | 1.760 | 0.624 |
| RDQ 7. Because of my back, I have to hold on to something to get out of an easy chair | -0.482 | 0.158 | 0.522 | 2.695 | 0.441 |
| RDQ 8. Because of my back, I try to get other people to do things for me | -0.252 | 0.153 | 1.712 | 8.550 | 0.036 |
| RDQ 9. I get dressed more slowly than usual because of my back | -0.522 | 0.159 | -0.079 | 1.594 | 0.661 |
| RDQ 10. I only stand up for short periods of time because of my back | -2.219 | 0.225 | -1.558 | 4.238 | 0.237 |
| RDQ 11. Because of my back, I try not to bend or kneel down | -3.023 | 0.284 | -0.823 | 2.227 | 0.527 |
| RDQ 12. I find it difficult to get out of chair because of my back | -0.647 | 0.162 | -0.527 | 3.033 | 0.387 |
| RDQ 14. I find it difficult to turn over in bed because of my back | -1.157 | 0.177 | -1.006 | 4.851 | 0.183 |
| RDQ 16. I have trouble putting on my sock (or stockings) because of the pain in my back | -0.753 | 0.164 | -0.316 | 2.821 | 0.420 |
| RDQ 17. I can only walk short distances because of my back pain | -0.745 | 0.164 | -2.068 | 8.215 | 0.042 |
| RDQ 19. Because of my back pain, I get dressed with the help of someone else | 3.879 | 0.253 | -0.611 | 4.508 | 0.212 |
| RDQ 21. I avoid heavy jobs around the house because of my back | -1.734 | 0.199 | 0.091 | 1.217 | 0.749 |
| RDQ 23. Because of my back, I go upstairs more slowly than usual | -2.556 | 0.247 | -1.294 | 3.386 | 0.336 |
| RDQ 24. I stay in bed most of the time because of my back | 1.959 | 0.157 | 0.786 | 7.979 | 0.046 |
| NHP 8. I find it painful to change position | -1.594 | 0.193 | -0.478 | 5.599 | 0.133 |
| NHP 11. I find it hard to bend | -1.954 | 0.210 | -1.284 | 2.197 | 0.533 |
| NHP 12. Everything is an effort | -0.805 | 0.166 | -1.470 | 7.025 | 0.071 |
| NHP 18. I find it hard to reach for things | -2.090 | 0.217 | -1.710 | 3.055 | 0.383 |
| NHP 19. I'm in pain when I walk | -1.740 | 0.200 | -1.263 | 3.802 | 0.284 |
| NHP 24. I'm in pain when I'm standing | -2.701 | 0.257 | -0.611 | 0.774 | 0.856 |
| NHP 25. I find it hard to get dressed by myself | 1.174 | 0.146 | 1.298 | 2.948 | 0.400 |
| NHP 26. I soon run out of energy | -2.134 | 0.220 | 5.455 | 1.989 | 0.575 |
| NHP 27. I find it hard to stand for long (e.g., at the kitchen sink, waiting in a line) | -3.334 | 0.314 | -1.092 | 1.178 | 0.758 |
| NHP 36. I'm in pain when going up or down stairs | -2.459 | 0.240 | -1.310 | 5.191 | 0.158 |
| NHP 38. I'm in pain when I'm sitting | -1.417 | 0.186 | 1.374 | 2.394 | 0.495 |
WHODAS II: World Health Organization Disability Assessment Schedule II, ODI: Oswestry Disability Index, RDQ: Roland Morris Low Back Pain Disability Questionnaire, NHP: Nottingham Health Profile, SE: Standard Error