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Table 4 Cross-tabulation of the SDQ self report and teacher report prediction of psychiatric disorders and the added value of the SAHA and K-SADS psychotic experiences scales (n = 152)

From: School-based screening for psychiatric disorders in Moroccan-Dutch youth

Screening instrument(s) Any DSM-IV diagnosis  
a. SDQ self/teacher, cut-off ≥ 26 Diagnosis No diagnosis  
 Screen positive (n = 44) 17 27 Positive predictive value = 39 %
 Screen negative (n = 108) 3 105 Negative predictive value = 97 %
 Level of the test = 29 % Sensitivity = 85 % Specificity = 80 % Efficiency = 80 %
b. SDQ self/teacher, cut-off ≥ 26 Diagnosis No diagnosis  
 OR
 SAHA, cut-off ≥ 33
  Screen positive (n = 56) 19 37 Positive predictive value = 34 %
  Screen negative (n = 96) 1 95 Negative predictive value = 99 %
  Level of the test = 37 % Sensitivity = 95 % Specificity = 72 % Efficiency = 75 %
c. SDQ self/teacher, cut-off ≥ 26 Diagnosis No diagnosis  
 OR
 K-SADS, cut-off ≥ 5
  Screen positive (n = 62) 18 44 Positive predictive value = 29 %
  Screen negative (n = 90) 2 88 Negative predictive value = 98 %
  Level of the test = 41 % Sensitivity = 90 % Specificity = 67 % Efficiency = 70 %
  1. Level of the test = number of screen positives/total number of cases
  2. Efficiency = true positives + true negatives/total number of cases