Physical Therapy Korea
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Fit statistics of the EQ-5D in descending order of difficulty

Items Difficulty (logits) Infit MnSq ZSTD Outfit MnSq ZSTD
EQ-5D 5 anxiety/depression 0.86 1.15 1.3 1.13 1.1
EQ-5D 3 usual activities 0.17 0.78 –1.9 0.77 –2.0
EQ-5D 4 pain/discomfort 0.00 0.92 –0.6 0.93 –0.5
EQ-5D 2 self-care1 –0.19 0.94 –0.4 0.90 –0.8
EQ-5D 1 mobility –0.84 1.21 1.7 1.19 1.5

EQ-5D, EuroQOL-5 dimension; MnSq, mean square standardized residuals; ZSTD, Z score standardized.

Phys. Ther. Korea 2020;27:233~240 https://doi.org/10.12674/ptk.2020.27.4.233
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