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Table 3 Summary of the rating scale analysis of original 4 point scale

From: The psychometric properties of the Childhood Health Assessment Questionnaire (CHAQ) in children with cerebral palsy

Category Level Observed Average Infit MNSQ Outfit MNSQ Structure Calibration
0 −33.19 0.92 0.95 None
1 −11.77 1.02 1.01 −17.48
2 8.18 0.87 0.70 1.50
3 33.06 1.31 1.26 15.95