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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-25 RCADS-20a
Broad anxiety MDD-10 MDD-5
Reliability
 Internal consistency (N = 69,487) Cronbach’s alpha 0.82 n.a.b 0.72
 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