Table 3.
Location | Standard Error | Fit Residual | χ2 | DF | Probability | |
---|---|---|---|---|---|---|
Pain subscale items | -0.050 | 0.010 | -4.110 | 6.990 | 2 | 0.030 |
Item 2 and 4 combined into a testlet 2. Going up or down stairs 4. Sitting or lying |
0.010 | 0.010 | 1.430 | 0.240 | 2 | 0.885 |
1. Walking on a flat surface | 0.050 | 0.010 | 0.260 | 0.100 | 2 | 0.953 |
3. At night while in bed | 0.000 | 0.010 | 2.170 | 0.820 | 2 | 0.663 |
5. Standing upright | -0.050 | 0.010 | -4.110 | 6.990 | 2 | 0.030 |
Physical Functioning subscale items | ||||||
Item 1 and 5 combined into a testlet 1. Descending the stairs 5. Bending to floor |
-0.350 | 0.006 | 4.267 | 6.574 | 2 | 0.037 |
2. Ascending the stairs | -0.101 | 0.009 | 1.135 | 0.466 | 2 | 0.792 |
3. Rising from sitting | -0.019 | 0.009 | 0.031 | 0.224 | 2 | 0.894 |
4. Standing | 0.015 | 0.009 | 2.333 | 3.379 | 2 | 0.185 |
6. Walking on flat | 0.065 | 0.009 | 1.055 | 0.020 | 2 | 0.990 |
7. Getting in/out of car | -0.035 | 0.009 | -0.875 | 6.211 | 2 | 0.045 |
8. Going shopping | -0.024 | 0.009 | -0.379 | 2.174 | 2 | 0.337 |
9. Putting on socks/stockings | -0.060 | 0.008 | 2.018 | 1.134 | 2 | 0.567 |
10. Rising from bed | 0.034 | 0.008 | 0.146 | 7.781 | 2 | 0.020 |
11. Taking off socks/stockings | -0.021 | 0.008 | -0.658 | 0.652 | 2 | 0.722 |
12. Lying in bed | 0.112 | 0.008 | 1.606 | 1.334 | 2 | 0.513 |
13. Getting in/out of bath | -0.058 | 0.008 | 1.475 | 1.433 | 2 | 0.488 |
14. Sitting | 0.194 | 0.009 | 0.467 | 2.195 | 2 | 0.334 |
15. Getting on/off toilet | 0.132 | 0.008 | 0.290 | 2.405 | 2 | 0.300 |
16. Heavy domestic duties | -0.096 | 0.009 | -1.238 | 8.452 | 2 | 0.015 |
17. Light domestic duties | 0.212 | 0.009 | 0.433 | 0.371 | 2 | 0.831 |
Stiffness subscale items | ||||||
1. How severe is your stiffness after first wakening in the morning? | -0.026 | 0.010 | -0.674 | 4.113 | 2 | 0.128 |
2. How severe is your stiffness after sitting, lying or resting later in the day? | 0.026 | 0.010 | -0.418 | 4.495 | 2 | 0.106 |
* Pain subscale Bonferroni adjusted (0.05/5 items, p-value considered significant if <0.01); Physical Functioning subscale Bonferroni adjusted (0.05/17 items, p-value considered significant if <0.003); Stiffness subscale Bonferroni adjusted (0.05/17 items, p-value considered significant if < 0.025)