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

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

 RCADS-25RCADS-20a
Broad anxietyMDD-10MDD-5
Reliability
 Internal consistency(N = 69,487)Cronbach’s alpha0.82n.a.b0.72
 Test-retest reliabilityc(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)
  1. 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
  2. a The broad anxiety scale of the RCADS-20 is equal to the broad anxiety scale of the RCADS-25
  3. 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