Table 2.
Initial fit statistics for individual items of the PREE
| Item | Location | SE | Fit statistics | ||
|---|---|---|---|---|---|
| Fit residual | Chi Square | Chi square probability | |||
| Pain sub scale | |||||
| Pain - When it is at its worst | −0.32 | 0.05 | 0.88 | 1.62 | 0.66 |
| Pain - At rest | 1.32 | 0.04 | −1.10 | 2.05 | 0.56 |
| Pain - When lifting a heavy object | −0.67 | 0.06 | 1.05 | 3.85 | 0.28 |
| Pain - When doing a task with repeated elbow movement | −0.36 | 0.05 | −1.28 | 4.35 | 0.23 |
| How often do you have pain? | 0.03 | 0.06 | 0.06 | 1.87 | 0.60 |
| Specific activities sub scale | |||||
| Comb my hair | 0.50 | 0.08 | −1.42 | 7.70 | 0.05 |
| Eat with a fork or spoon | 0.55 | 0.08 | −1.26 | 4.15 | 0.25 |
| Pull a heavy object | −1.25 | 0.09 | −0.91 | 1.07 | 0.78 |
| Use my arm to rise from a chair | −0.35 | 0.07 | −0.12 | 3.08 | 0.38 |
| Carry a 10 lb object with my arm at my side | −0.82 | 0.07 | 2.29 | 13.61 | 0.03 |
| Throw a small object, such as a tennis ball | −0.60 | 0.08 | 0.96 | 0.24 | 0.97 |
| Use a telephone | 0.63 | 0.07 | 1.03 | 5.69 | 0.13 |
| Do up buttons on the front of my shirt | 0.42 | 0.07 | 0.91 | 2.64 | 0.45 |
| Wash my opposite armpit | 0.44 | 0.08 | −1.04 | 6.41 | 0.09 |
| Tie my shoe | 0.37 | 0.10 | 1.27 | 6.19 | 0.10 |
| Turn the doorknob and open a door | 0.10 | 0.08 | 0.56 | 1.43 | 0.70 |
| Usual activities sub scale | |||||
| Personal activities (dressing, washing) | 0.86 | 0.06 | −0.97 | 1.91 | 0.39 |
| Household work (cleaning, maintenance) | −0.04 | 0.05 | −2.17 | 3.95 | 0.14 |
| Work (your job or everyday work) | −0.35 | 0.07 | 0.25 | 2.01 | 0.37 |
| Recreational activities | −0.47 | 0.07 | 0.65 | 0.12 | 0.94 |
SE-standard error; PREE – Patient Rated elbow Evaluation; a Was not significant after Bonferroni correction applied