Skip to main content

Table 3 Internal consistency and ceiling-floor effects for the EORTC QLQ-C30 and FACT-G

From: The ability of cancer-specific and generic preference-based instruments to discriminate across clinical and self-reported measures of cancer severities

  Scores mean (SD) α 1 α 2
EORTC-QLQ-C30    
Physical functioning 77.53(19.49) 0.78 0.77
Social functioning 72.12(26.23) 0.77 0.77
Emotional functioning 78.43(21.12) 0.81 0.81
Cognitive functioning 80.56(21.90) 0.82 0.81
Role functioning 72.83(26.35) 0.76 0.76
Global health status 68.75(20.46) 0.78 0.78
FACT-G subscale    
Physical Well-Being 21.38(5.11) 0.79 0.82
Social/Family Well-Being 23.13(4.09) 0.82 0.69
Emotional Well-Being 18.38(4.36) 0.87 0.74
Functional Well-Being 18.65(5.54) 0.83 0.80
Global health status 81.50(14.22) 0.71 0.89
  1. Notes: 1α = Cronbach's alpha coefficient.
  2. 2α = Cronbach's alpha coefficient original version of QLQ-C30 by Aaronson and colleagues [4] and of FACT-G by Cella and colleagues [5].