Psychometric evaluation of two short versions of the Revised Child Anxiety and Depression Scale

BMC Psychiatry

Table 5 Reliability and hypotheses testing for construct validity of the RCADS-25 and RCADS-20 subscales

			RCADS-25		RCADS-20^a
			Broad anxiety	MDD-10	MDD-5
Reliability
Internal consistency	(N = 69,487)	Cronbach’s alpha	0.82	n.a.^b	0.72
Test-retest reliability^c	(N = 277)	ICC (95% CI)	0.73 (0.66–0.78)	0.70 (0.62–0.76)	0.60 (0.52–0.67)
Hypotheses testing
Hypotheses about correlation SCARED-NL	(N = 269)	r (95% CI)	0.84 (0.80–0.87)	0.68 (0.61–0.74)	0.66 (0.58–0.72)
Hypotheses about correlation CDI-2	(N = 276)	r (95% CI)	0.66 (0.59–0.72)	0.66 (0.58–0.72)	0.59 (0.51–0.67)

RCADS Revised Child Anxiety and Depression Scale, MDD Major depressive disorder, n.a Not applicable, ICC Intraclass correlation coefficient, SCARED-NL Screen for Child Anxiety Related Emotional Disorders-Dutch version, CDI-2 Children’s Depression Inventory-second version
^a The broad anxiety scale of the RCADS-20 is equal to the broad anxiety scale of the RCADS-25
^b Cronbach’s alpha was not calculated for the RCADS-25 MDD-10 scale, since the data did not fit a one-factor model, and unidimensionality is a prerequisite for its interpretation

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