Skip to main content

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