Health and Quality of Life Outcomes

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

Notes: ¹α = Cronbach's alpha coefficient.
²α = Cronbach's alpha coefficient original version of QLQ-C30 by Aaronson and colleagues [4] and of FACT-G by Cella and colleagues [5].

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ISSN: 1477-7525

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