Table 2.
Test–retest reliability of each item of the GV-UEFI.
| Questions | ICC | Cronbach’s Alpha If Item Deleted | Corrected Item-Total Correlation |
|---|---|---|---|
| Any of your usual work, housework, or school activities | 0.93 | 0.988 | 0.978 |
| Your usual hobbies, recreational or sporting activities | 0.97 | 0.988 | 0.978 |
| Lifting a bag of groceries to waist level | 0.97 | 0.988 | 0.755 |
| Lifting a bag of groceries above your head | 1 | 0.988 | 0.888 |
| Grooming your hair | 0.96 | 0.988 | 0.887 |
| Pushing up on your hands (e.g., from bathtub or chair) | 0.93 | 0.988 | 0.964 |
| Preparing food (e.g., peeling, and cutting) | 0.96 | 0.988 | 0.422 |
| Driving | 1 | 0.988 | 0.978 |
| Vacuuming, sweeping or raking | 1 | 0.988 | 0.964 |
| Dressing | 0.97 | 0.988 | 0.612 |
| Doing up buttons | 0.97 | 0.988 | 0.978 |
| Using tools or appliances | 0.97 | 0.988 | 0.888 |
| Opening doors | 0.96 | 0.988 | 0.978 |
| Cleaning | 0.93 | 0.988 | 0.773 |
| Tying or lacing shoes | 0.93 | 0.988 | 0.892 |
| Sleeping | 0.96 | 0.988 | 0.964 |
| Laundering clothes (e.g., washing, ironing, and folding) | 1 | 0.988 | 0.731 |
| Opening a jar | 0.92 | 0.988 | 0.336 |
| Throwing a ball | 0.96 | 0.988 | 0.706 |
| Carrying a small suitcase with your affected limb | 0.87 | 0.988 | 0.949 |
Abbreviations: ICC: Intraclass correlation coefficient between test–retest for each question, Cronbach’s alpha if item deleted: how the calculated Cronbach’s alpha value would change when each specific item is removed from the scale, Corrected item-total correlation: Pearson’s correlation between the specific item and the sum of all the other items.