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Table 2 Rasch analysis results of ArmA-TH passive and active function sub-scale

From: Investigating psychometric properties of the arm activity measure – Thai version (ArmA-TH) sub‐scales using the Rasch model

Section Aa
Passive function sub-scale
Measure Infit Outfit Disordered threshold Local dependence
 1. Cleaning palm 0.08 0.93 0.89 Yes No
 2. Cutting fingernails -0.79 0.79 0.77 Yes No
 3. Putting on a glove -0.49 0.96 0.86 Yes No
 4. Cleaning armpit -0.03 0.8 0.73 No No
 5. Putting arm through a sleeve 0.07 1.21 1.23 No No
 6. Put on a splint 1.06 1.31 0.89 Yes No
 7. Positioning arm on a cushion or support in sitting 0.09 1.19 1.31 Yes No
Section Bb
Active function sub-scale
 1. Fasten buttons on clothing -0.39 0.96 0.87 Yes No
 2. Pick up a glass, bottle, or can 1.15 0.86 1.11 Yes No
 3. Use a key to unlock the door -0.06 0.91 0.8 Yes No
 4. Write on paper -0.54 1.22 1.22 Yes No
 5. Open a previously opened jar -0.39 0.92 0.92 Yes No
 6. Eat with a knife and fork 0.55 0.94 0.8 Yes No
 7. Hold an object still while using unaffected hand -1.66 1.38 1.75 Yes No
 8. Difficulty with balance when walking due to your arm -0.87 1.12 1.27 Yes No
 9. Dial a number on home phone -0.2 1.07 0.88 Yes No
 10. Tuck in your shirt -0.36 1.19 1.3 Yes No
 11. Comb or brush your hair 0.92 0.64 0.35 Yes #12 #13
 12. Brush your teeth 0.89 0.68 0.57 Yes #13
 13. Drink from a cup or mug 0.95 0.72 0.41 Yes #12
  1. aAsks about ‘caring’ for your affected arm either yourself with your unaffected arm or by a carer or a combination of both of these. This section does not ask about using your affected arm to complete any of the tasks. bAsks what you can do with your affected arm or using both arms