Table 3: Test-retest reliability and internal consistency of the ChQOL-HK   Facets   Test-retest reliability Intra-class correlation coefficients   Internal consistency Cronbach's a     ChQOL-HK N=122   ChQOL N=56   ChQOL-HK N=122   ChQOL N=273 Complexion   0.84   0.75   0.76   0.86 Sleep   0.81   0.68   0.73   0.74 Stamina   0.79   0.82   0.76   0.85 Appetite & Digestion   0.77   0.74   0.71   0.82 Climate Adjustment   0.82   0.84   0.70   0.74 Consciousness   0.78   0.67   0.88   0.79 Thinking   0.88   0.78   0.90   0.90 Spirit of the Eyes   0.81   0.70   0.87   0.75 Verbal Expression   0.82   0.81   0.79   0.71 Joy   0.80   0.71   0.86   0.87 Anger   0.79   0.80   0.83   0.80 Depressed Mood   0.84   0.76   0.86   0.84 Fear & Anxiety   0.78   0.80   0.75   0.73                   Domains                 Physical Form   0.90   0.83   0.73   0.80 Spirit   0.89   0.87   0.83   0.89 Emotion   0.90   0.87   0.76   0.82                   Overall score   0.92   0.90   0.70   0.80