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Fit statistics of the WHOQOL-BREF in descending order of difficulty

Items Difficulty (logits) Infit MnSq ZSTD Outfit MnSq ZSTD
WHOQOL 26 Negative feeling (Psy) 1.06 2.29 8.5 2.59 9.9
WHOQOL 12 Financial support (E) 0.72 1.10 1.0 1.09 0.8
WHOQOL 14 Leisure activity (E) 0.69 1.13 1.2 1.11 1.0
WHOQOL 18 Work capacity (P) 0.64 0.95 –0.5 0.93 –0.6
WHOQOL 3 Pain (P) 0.58 2.88 9.9 3.11 9.9
WHOQOL 10 Energy for daily life, 1.83 (P) 0.50 0.83 –1.6 0.83 –1.6
WHOQOL 11 Bodily image (Psy) 0.40 0.80 –1.9 0.80 –1.9
WHOQOL 5 Positive feeling (Psy) 0.29 0.79 –2.0 0.80 –1.9
WHOQOL 13 Accessibility of information (E) 0.17 0.79 –2.0 0.78 –2.1
WHOQOL 16 Sleep and rest (P) 0.15 1.09 0.8 1.10 0.9
WHOQOL 21 Sexual activity (S) 0.12 0.75 –2.4 0.76 –2.3
WHOQOL 8 Security (E) 0.10 0.63 –3.8 0.63 –3.8
WHOQOL 9 Physical environment (E) –0.01 0.65 –3.6 0.65 –3.5
WHOQOL 15 Mobility (P) –0.04 1.03 0.3 1.02 0.2
WHOQOL 17 Activities of daily living (P) –0.07 0.64 –3.6 0.65 –3.6
WHOQOL 7 Concentration (Psy) –0.13 0.84 –1.5 0.86 –1.3
WHOQOL 19 Self-esteem (Psy) –0.19 0.64 –3.6 0.64 –3.7
WHOQOL 4 Dependence of medical aids (P) –0.41 1.83 6.0 1.98 6.9
WHOQOL 6 Personal belief (Psy) –0.56 0.99 0 1.00 0.1
WHOQOL 22 Social support (S) –0.60 0.76 –2.3 0.77 –2.2
WHOQOL 20 Personal relationship (S) –0.71 0.66 –3.4 0.66 –3.3
WHOQOL 23 Home environment (E) –0.80 0.73 –2.6 0.75 –2.3
WHOQOL 25 Transport (E) –1.00 0.65 –3.4 0.66 –3.3
WHOQOL 24 Health care (E) –1.07 0.77 –2.1 0.76 –2.2

WHOQOL-BREF, abbreviated version of the World Health Organization Quality of Life; MnSq, mean square standardized residuals; ZSTD, Z score standardized; Psy, psychosocial domain; E, environmental domain; P, physical heath domain; S, Social Relationship domain.

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