Table 3.

Individual screening instrument performance for screening for mental disorders

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

*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

Phase-1: N = 748; Phase-2: N = 194; proportions shown are probability weight adjusted for level of participation by screening stratum

WASSS-I WHO-UNHCR assessment schedule of serious symptoms in humanitarian settings-household interview - individual interview portion

SRQ-20 self reporting questionnaire - 20 Question version

PPV positive predictive value, NPV negative predictive value