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Table 3 Diagnostic validity of CADB-R

From: Training second-grade dyslexic students using a computerized program in Asyut, Egypt

Studied cognitive skill TP TN FP FN Sensitivity Specificity PPV NPV
Reading comprehension 44 264 57 8 84.6% 82% 43.5% 97%
Auditory-Visual discrimination 41 271 50 11 79% 84% 45% 96%
Auditory discrimination 42 278 43 10 80.8% 87% 49% 97%
Phonological awareness 39 261 60 13 75% 81% 41% 95%
Visuospatial skills 39 266 55 13 75% 83% 41% 95%
Visual discrimination 28 295 26 24 0.0 97 0.0 0.0
Auditory memory 30 260 61 22 58% 81% 33% 92.2%
Total cognitive skills for reading 45 271 50 7 86.5% 84% 45.9% 97%
  1. *TP = True Positive (dyslexics scoring < cut-off); TN = True Negative (control scoring > cut-off), FP = False Positive (control scoring < cut-off); FN = False Negative (dyslexics scoring > cut-off); Sensitivity = TP/(TP + FN); Specificity = TN/(TN + FP); Positive Predictive Value (PPV) = TP/(TP + FP); Negative Predictive Value (NPV) = TN/(TN + FN)