https://www.selleckchem.com/pr....oducts/tideglusib.ht
MAIN OUTCOME MEASURES Infit and outfit statistics, item step difficulties, person ability parameters, category function, and item and test information functions. RESULTS Large ceiling effects were present in the KOOS and International Knee Documentation Committee subjective knee form. Of the 65 items examined in this study, 35 items showed poor measurement properties. Item step difficulty for the remaining 30 items ranged from -5.45 (least difficult) to 0.57 logits (most difficult). The 5-category response options did not function we
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