Effects of mode of administration (MOA) on the measurement properties of the EORTC QLQ-C30: a randomized study

Table 3 Cronbach's alpha's for multi-item Scales for three MOA groups

EORTC QLQ-C30 Multi-item Scales	Paper & pencil at home (N = 132)	Telephone (N = 121)	Paper & pencil in-clinic (N = 61)
Physical function	0.69	0.71	0.69
Role function* ^&	0.87	0.80	0.93
Cognitive function	0.57	0.64	0.57
Emotional function	0.86	0.86	0.84
Social function	0.78	0.64	0.81
Global health/QoL	0.84	0.84	0.89
Fatigue	0.87	0.87	0.88
Nausea/vomiting	0.73	0.75	0.64
Pain	0.86	0.87	0.79

* p < 0.05
** p < 0.01
& The significant difference in this comparison is between the telephone versus the in-clinic Paper & Pencil condition

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