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Table 3 Individual screening instrument performance for screening for mental disorders

From: A two-phase approach for the identification of refugees with priority need for mental health care in Lebanon: a validation study

Screening Method B (Individual Interview) Phase 1 Participants Moderate or Severe Disorder*
Among Method A Screen Negatives Positive Response Sensitivity Specificity PPV NPV
WASSS-individual questionnaire n (%)     
 No most/all of the time responses 257.0 81.6 REFERENCE
 At least 1 most/all of the time responses 58.0 18.4 50.0 83.4 8.1 98.3
 At least 2 most/all of the time responses 25.0 7.9 50.0 96.8 31.6 98.5
 At least 3 most/all of the time responses 11.0 3.5 0.0 98.2 0.0 97.1
 At least 4 most/all of the time responses 8.0 2.5 0.0 98.7 0.0 97.1
 At least 5 most/all of the time responses 4.0 1.3 0.0 98.7 0.0 97.1
 6 most/all of the time responses 1.0 0.3
SRQ-20
 No positive responses 112.0 35.6 REFERENCE
 At least 1 positive response 203.0 64.4 100.0 32.6 4.2 100.0
 At least 4 positive responses 101.0 32.1 100.0 77.0 11.3 100.0
 At least 6 positive responses 71.0 22.5 100.0 82.5 14.3 100.0
 At least 7 positive responses 55.0 17.5 83.3 85.9 14.7 99.4
Combined Method B Instruments
 No positive responses 107.0 34.0 REFERENCE
 At least 2 positive responses 162.0 51.4 100.0 49.0 5.4 100.0
 At least 6 positive responses 73.0 23.2 100.0 83.9 15.3 100.0
 A least 1 WSSS or 6 SRQ positive responses 86.0 27.4 100.0 78.1 11.8 100.0
  1. *Moderate-severe disorders are current severe disorders or any current mental disorder with at least moderate impairment, n = 53, Severe disorders are current psychosis or any current mental disorder and severe impairment, n = 27
  2. Phase-1: N = 748; Phase-2: N = 194; proportions shown are probability weight adjusted for level of participation by screening stratum
  3. WASSS-I WHO-UNHCR assessment schedule of serious symptoms in humanitarian settings-household interview - individual interview portion
  4. SRQ-20 self reporting questionnaire - 20 Question version
  5. PPV positive predictive value, NPV negative predictive value