Physical Therapy Korea
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Item difficulty of the WHOQOL-BREF in descending order of difficulty

Item Difficulty (logits) Difficulty (logits) Item
EQ-5D 4 52.94 58.52 WHOQOL 18
EQ-5D 3 51.33 56.99 WHOQOL 12
EQ-5D 1 44.25 49.82 WHOQOL 9
EQ-5D 5 43.37 45.08 WHOQOL 3
EQ-5D 2 32.87 39.59 WHOQOL 24

WHOQOL-BREF, World Health Organization Quality of Life; EQ-5D, EuroQOL-5 dimension.

Phys. Ther. Korea 2023;30:32~40 https://doi.org/10.12674/ptk.2023.30.1.32
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