Table III.
The 15 items of Assisting Hand Assessment for people with brachial plexus birth injury (AHA-Plex) ranked hierarchically with more difficult items at the top. Both infit and outfit statistics are reported, however only infit statistics are used as criteria
| Item name | Measure logits | SE | Infit | Outfit | ||
|---|---|---|---|---|---|---|
| MnSq | z-std | MnSq | z-std | |||
| More difficult items | ||||||
| Moves forearm | 3.14 | 0.19 | 1.00 | 0.04 | 1.87 | 2.53 |
| Moves upper arm | 2.36 | 0.18 | 1.06 | 0.46 | 5.11 | 7.35 |
| Reaches | 2.09 | 0.18 | 1.01 | 0.15 | 1.15 | 0.61 |
| Chooses assisting hand when closer to objects | 1.86 | 0.18 | 1.19 | 1.37 | 1.11 | 0.50 |
| Manipulates | 1.38 | 0.19 | 0.88 | –0.86 | 0.78 | –0.83 |
| Grasps | 0.31 | 0.20 | 0.86 | –0.98 | 0.70 | –1.43 |
| Varies type of grasp | 0.28 | 0.20 | 0.55 | –3.67 | 0.49 | –2.76 |
| Moves fingers | 0.08 | 0.20 | 0.98 | –0.09 | 1.10 | 0.50 |
| Readjusts grasp | –0.04 | 0.20 | 0.84 | –1.11 | 0.75 | –1.10 |
| Regulates grip force | –0.16 | 0.20 | 1.07 | 0.52 | 0.90 | 0.35 |
| Flow in bimanual performance | –0.46 | 0.21 | 0.71 | –2.09 | 0.78 | –0.83 |
| Initiates use | –0.90 | 0.22 | 1.20 | 1.22 | 1.31 | 1.00 |
| Orients objects | –1.86 | 0.23 | 1.04 | 0.28 | 1.03 | 0.23 |
| Holds | –3.68 | 0.28 | 1.28 | 1.32 | 0.51 | –0.47 |
| Stabilizes by weight or support | –4.40 | 0.32 | 0.70 | –1.37 | 0.23 | –1.06 |
| Easier items | ||||||
SE: standard error; MnSq: mean square; z-std: z-statistics.