Applicability and clinical utility of the German rivermead post-concussion symptoms questionnaire in proxies of children after traumatic brain injury: an instrument validation study

Table 3 Reliability coefficients of the RPQ proxy version

RPQ Scale	Cronbach’s α	α when item omitted	McDonald’s ω	CITC Range	Correlations
					(1)	(2)	(3)
(1) Cognitive	0.87	0.80–0.84	0.88	0.79–0.83	1	–	–
(2) Somatic	0.81	0.76–0.80	0.84	0.46–0.73	0.60	1	–
(3) Emotional	0.83	0.72–0.83	0.86	0.60–0.89	0.67	0.68	1
(4) Total	0.90	0.89–0.90	0.92	0.36–0.78	0.77	0.89	0.85

CITC = Corrected Item-Total Correlation. Values in bold indicate at least satisfactory Cronbach’s α (i.e., α ≥ 0.70) and McDonald’s ω (i.e., ω ≥ 0.80) or at least moderate Spearman correlation coefficients (i.e., r ≥ 0.30)

ISSN: 1471-2377