eCross-cultural adaptation of the spine oncology-specific SOSGOQ2.0 questionnaire to German language and the assessment of its validity and reliability in the clinical setting

Table 2 Internal Consistency of the SOSGOQ2.0_GER in comparison to the EORTC QLQ-C30 domains measured at baseline assessment. Cronbach alpha values below 0.70 are a sign of poor consistency

SOSGOQ2.0_GER					EORTC QLQ-C30
Domains	Questions	Cronbachs alpha	average interitem correlation	item correlation with domain score	Questions	Cronbachs alpha	average interitem correlation	item correlation with domain score
*Physical functioning*	Overall	0.90	0.59	–	Overall	0.90	0.66	–
	1) activity	0.88	0.59	0.81	1)	0.89	0.67	0.82
	2) employability	0.87	0.57	0.86	2)	0.88	0.65	0.86
	3) independence	0.87	0.57	0.86	3)	0.86	0.63	0.91
	4) agility	0.87	0.57	0.88	4)	0.87	0.64	0.88
	5) walking	0.89	0.63	0.74	5)	0.90	0.71	0.80
	6) social life	0.89	0.63	0.74
*Pain*	Overall	0.88	0.59	–	Overall	0.88	0.78	–
	11) intensity	0.85	0.6	0.8	9)	0.78	0.78	0.94
	12) persistency	0.84	0.58	0.84	19)	0.62	NA	0.95
	13) mobility	0.83	0.55	0.87
	14) coping	0.84	0.57	0.84
	15) overwhelming	0.87	0.64	0.75
*Mental health / Cognitive Functioning*	Overall	0.53	0.36	–	Overall	0.48	0.32	–
	16) depression	0.36	0.36	0.81	20)	0.32	0.32	0.86
	17) anxiety	0.13	NA	0.84	25)	0.1	NA	0.76
*Social Functioning*	Overall	0.52	0.25	–	Overall	0.8	0.67	–
	18) concentration	0.31	0.19	0.77	26)	0.67	0.67	0.92
	19) relationships	0.18	0.1	0.81	27)	0.45	NA	0.91
	20) new people	0.63	0.46	0.54

ISSN: 1471-2407