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Table 3 Accuracy in distinguishing ASD (N = 201) from non-ASD (N = 578) (ROC analysis)

From: The Ritvo Autism Asperger Diagnostic Scale-Revised (RAADS-R): A Scale to Assist the Diagnosis of Autism Spectrum Disorder in Adults: An International Validation Study

Variable Thresholda Sensitivity % Specificity % Accuracy %
Original subscale Dom
Social construct 31 96.0 96.2 96.1
Circumscribed interest 15 89.6 97.1 93.3
Sensory motor 16 85.1 95.2 90.2
Language 4 88.6 91.5 90.1
Total score 65 97 100 98.5
Factor 1—Social related 0.13 78.7 93.8 86.2
Factor 2—Circumscribed int. 0.34 86.6 95.5 91.1
Factor 3—Sensory motor 0.36 71.8 92.5 82.2
Factor 4—Social anxiety 0.17 76.7 74.2 75.5
  1. aValue that best separates ASD from non ASD in SD units