Table 3.
Means, standard deviations, and estimated item parameters of the AMSQ.
| Item | M | SD | Item parameters |
|||||
|---|---|---|---|---|---|---|---|---|
| α | β1 | β2 | β3 | β4 | β5 | |||
| 1. “Write down a short sentence with a pen” | 2.10 | 1.48 | 2.79 | 0.09 | 0.67 | 0.99 | 1.50 | 2.04 |
| 2. “Grasp small objects, for example, a key or ballpoint pen” | 2.00 | 1.25 | 3.28 | −0.01 | 0.62 | 1.16 | 1.82 | 2.63 |
| 3. “Put on a coat” | 1.83 | 1.35 | 4.22 | 0.34 | 0.82 | 1.23 | 1.57 | 1.82 |
| 4. “Tie shoelaces” | 2.25 | 1.73 | 4.54 | 0.11 | 0.55 | 0.87 | 1.12 | 1.29 |
| 5. “Hold a full plate” | 2.24 | 1.61 | 4.08 | −0.01 | 0.50 | 0.90 | 1.22 | 1.47 |
| 6. “Pour from a bottle into a glass” | 2.11 | 1.49 | 4.40 | 0.05 | 0.58 | 1.01 | 1.35 | 1.68 |
| 7: “Turn the pages of a book” | 1.86 | 1.27 | 3.75 | 0.20 | 0.81 | 1.26 | 1.65 | 2.20 |
| 8. “Use a mouse of a computer” | 1.73 | 1.25 | 3.10 | 0.39 | 1.04 | 1.53 | 1.73 | 2.09 |
| 9. “Use a pen or pencil” | 2.02 | 1.43 | 3.74 | 0.11 | 0.69 | 1.11 | 1.48 | 1.84 |
| 10. “Turn a key in a lock” | 1.87 | 1.31 | 4.03 | 0.22 | 0.83 | 1.23 | 1.67 | 1.89 |
| 11. “Cut off a piece of paper with a pair of scissors” | 1.89 | 1.39 | 5.05 | 0.27 | 0.78 | 1.16 | 1.50 | 1.81 |
| 12. “Fasten a seatbelt in a car” | 1.74 | 1.28 | 4.56 | 0.40 | 0.92 | 1.28 | 1.61 | 1.97 |
| 13. “Fasten buttons” | 2.49 | 1.63 | 4.29 | −0.29 | 0.33 | 0.72 | 1.05 | 1.47 |
| 14. “Open a bottle of soft drink” | 2.23 | 1.54 | 3.01 | −0.10 | 0.57 | 0.97 | 1.35 | 1.70 |
| 15. “Take off a sweater or T-shirt” | 1.74 | 1.23 | 4.14 | 0.35 | 0.91 | 1.40 | 1.70 | 2.01 |
| 16. “Pick up coins from a table” | 2.08 | 1.35 | 3.97 | −0.08 | 0.61 | 1.05 | 1.53 | 2.03 |
| 17. “Use a keyboard” | 1.81 | 1.24 | 3.77 | 0.24 | 0.87 | 1.36 | 1.78 | 2.08 |
| 18. “Zip up a coat” | 1.95 | 1.37 | 5.07 | 0.14 | 0.75 | 1.11 | 1.49 | 1.80 |
| 19. “Carry a shopping bag” | 2.50 | 1.71 | 2.67 | −0.24 | 0.40 | 0.80 | 1.14 | 1.46 |
| 20. “Wash your hands” | 1.48 | 1.08 | 4.52 | 0.76 | 1.18 | 1.53 | 1.86 | 2.20 |
| 21. “Cut something with a knife” | 2.05 | 1.52 | 5.01 | 0.18 | 0.64 | 0.99 | 1.32 | 1.62 |
| 22. “Pierce food with a fork” | 1.70 | 1.16 | 4.38 | 0.38 | 0.97 | 1.40 | 1.81 | 2.20 |
| 23. “Dry off your body” | 1.81 | 1.28 | 3.79 | 0.30 | 0.87 | 1.32 | 1.70 | 2.02 |
| 24. “Open a bottle with a screw cap” | 2.30 | 1.54 | ||||||
| 25. “Unbutton your shirt” | 2.31 | 1.56 | 4.35 | −0.15 | 0.44 | 0.83 | 1.23 | 1.62 |
| 26. “Wash the back of your shoulder” | 2.22 | 1.65 | 3.07 | 0.05 | 0.59 | 0.96 | 1.25 | 1.49 |
| 27. “Wash your hair” | 1.89 | 1.51 | 3.67 | 0.37 | 0.89 | 1.14 | 1.37 | 1.62 |
| 28. “Open a bag of crisps” | 1.96 | 1.44 | 3.97 | 0.21 | 0.74 | 1.15 | 1.46 | 1.78 |
| 29. “Bring a full glass or cup to your mouth” | 1.75 | 1.30 | 3.82 | 0.37 | 1.02 | 1.39 | 1.60 | 1.88 |
| 30. “Put toothpaste on a toothbrush” | 1.69 | 1.27 | 4.64 | 0.47 | 1.01 | 1.35 | 1.62 | 1.80 |
| 31. “Tuck a T-shirt/shirt in the back of your trousers using your hand” | 1.84 | 1.39 | 4.45 | 0.36 | 0.85 | 1.17 | 1.50 | 1.80 |
n = 690; M: mean; SD: standard deviation; AMSQ: Arm Function in Multiple Sclerosis Questionnaire.
Missing values have been listwise deleted; α; discrimination parameter, β1–5; threshold parameters.