Item labels | Descriptive statistics | Confirmatory factor analysis | Internal consistency | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Baseline analysis | Final analysis | |||||||||
Mean ± SD | Factor Loading | SE | Factor Loading | SE | ITC | αIID | ||||
1. Open a tight or new jar | 2.8 ± 1.3 | 0.711 | 0.045 | 0.724 | 0.046 | 0.677 | 0.949 | |||
2. Write | 1.3 ± 0.6 | 0.529 | 0.092 | 0.538 | 0.094 | 0.368 | 0.951 | |||
3. Turn a key | 1.6 ± 0.9 | 0.600 | 0.071 | 0.568 | 0.075 | 0.473 | 0.950 | |||
4. Prepare a meal | 1.7 ± 0.8 | 0.722 | 0.050 | 0.703 | 0.054 | 0.621 | 0.949 | |||
5. Push open a heavy door | 2.7 ± 1.1 | 0.736 | 0.043 | 0.751 | 0.043 | 0.679 | 0.948 | |||
6. Place object on shelf above your head | 3.5 ± 1.1 | 0.812 | 0.033 | 0.822 | 0.033 | 0.745 | 0.948 | |||
7. Do heavy household chores | 3.0 ± 1.1 | 0.801 | 0.035 | 0.815 | 0.035 | 0.739 | 0.948 | |||
8. Garden or do yard work | 2.8 ± 1.1 | 0.687 | 0.046 | 0.700 | 0.047 | 0.643 | 0.949 | |||
9. Make a bed | 2.5 ± 1.1 | 0.822 | 0.032 | 0.837 | 0.032 | 0.759 | 0.948 | |||
10. Carry a shopping bag or briefcase | 2.4 ± 1.1 | 0.785 | 0.033 | 0.720 | 0.040 | 0.670 | 0.949 | |||
11. Carry a heavy object (over 10 lbs) | 2.8 ± 1.1 | 0.796 | 0.034 | 0.728 | 0.042 | 0.693 | 0.948 | |||
12. Change a lightbulb overhead | 3.6 ± 1.2 | 0.820 | 0.031 | 0.831 | 0.031 | 0.747 | 0.948 | |||
13. Wash or blow dry your hair | 2.8 ± 1.3 | 0.704 | 0.045 | 0.715 | 0.045 | 0.677 | 0.949 | |||
14. Wash your back | 3.9 ± 1.1 | 0.719 | 0.046 | 0.733 | 0.047 | 0.653 | 0.949 | |||
15. Put on a pullover sweater | 3.0 ± 1.1 | 0.678 | 0.047 | 0.688 | 0.047 | 0.621 | 0.949 | |||
16. Use a knife to cut food | 1.8 ± 1.0 | 0.654 | 0.052 | 0.667 | 0.053 | 0.573 | 0.949 | |||
17. Recreational: little effort | 1.6 ± 0.9 | 0.685 | 0.055 | 0.696 | 0.056 | 0.533 | 0.950 | |||
18. Recreational: force | 3.3 ± 1.2 | 0.686 | 0.045 | 0.644 | 0.052 | 0.641 | 0.949 | |||
19. Recreational: free arm movement | 3.5 ± 1.1 | 0.715 | 0.049 | 0.679 | 0.054 | 0.662 | 0.949 | |||
20. Manage transportation needs | 1.4 ± 0.8 | 0.393 | 0.084 | 0.400 | 0.085 | 0.287 | 0.951 | |||
21. Sexual activities | 1.5 ± 0.5 | 0.438 | 0.076 | 0.447 | 0.077 | 0.367 | 0.951 | |||
22. Interference with social activities | 2.7 ± 1.0 | 0.714 | 0.042 | 0.635 | 0.054 | 0.616 | 0.949 | |||
23. Limitation in work and daily activities | 2.6 ± 1.0 | 0.744 | 0.037 | 0.697 | 0.043 | 0.678 | 0.949 | |||
24. Arm, shoulder or hand pain | 2.9 ± 0.9 | 0.712 | 0.045 | 0.644 | 0.053 | 0.643 | 0.949 | |||
25. Pain during activity | 2.9 ± 0.8 | 0.704 | 0.053 | 0.686 | 0.055 | 0.762 | 0.948 | |||
26. Tingling | 1.9 ± 1.0 | 0.530 | 0.063 | 0.540 | 0.064 | 0.524 | 0.950 | |||
27. Weakness | 2.5 ± 1.0 | 0.594 | 0.056 | 0.607 | 0.057 | 0.568 | 0.949 | |||
28. Stiffness | 3.1 ± 1.1 | 0.498 | 0.059 | 0.509 | 0.060 | 0.463 | 0.951 | |||
29. Sleep difficulty | 2.8 ± 1.2 | 0.699 | 0.051 | 0.662 | 0.057 | 0.650 | 0.949 | |||
30. Capability and confidence | 3.1 ± 1.3 | 0.512 | 0.066 | 0.484 | 0.071 | 0.505 | 0.950 | |||
Recommended values | N/A | ≥ 0.400 | N/A | ≥ 0.400 | N/A | ≥ 0.250 | <α |