Table 3 Item calibrations (measure with standard error, SE), and fit statistics (infit and outfit mean-square statistics, MnSq) for the FreBAQ-I
Item | Measure (SE) | Fit (MnSq) | |
|---|---|---|---|
Infit | Outfit | ||
1. My back feels as though it is not part of the rest of my body | 0.68 (0.14) | 0.86 | 0.80 |
2. I need to focus all my attention on my back to make it move the way I want it to | -0.34 (0.11) | 1.06 | 1.17 |
3. I feel as if my back sometimes moves involuntarily, without my control | 0.43 (0.13) | 0.86 | 0.80 |
4. When performing everyday tasks, I don’t know how much my back is moving | 0.17 (0.12) | 0.88 | 0.86 |
5. When performing everyday tasks, I am not sure exactly what position my back is in | -0.55 (0.10) | 1.03 | 1.05 |
6. I can’t perceive the exact outline of my back | -0.15 (0.11) | 0.87 | 0.97 |
7. My back feels like it is enlarged (swollen) | 0.28 (0.12) | 1.27 | 1.00 |
8. My back feels like it has shrunk | 0.72 (0.14) | 1.16 | 0.91 |
9. My back feels lopsided (asymmetrical) | -1.24 (0.11) | 1.23 | 1.23 |