Table 1.

Sensitivity and Specificity of the ISI-3 for Detecting Survivors with SCID-5 Insomnia Diagnoses

ISI-3 total scores	Insomnia diagnosis n = 52 (of 250)
Alternative cutoff values	Sensitivity (95% CI)	Specificity (95% CI)	% correct
≥2	0.98 (0.88–1.00)	0.39 (0.33–0.47)	51.6
≥3	0.98 (0.88–1.00)	0.58 (0.51–0.65)	66.4
≥4	0.94 (0.83–0.99)	0.70 (0.63–0.76)	74.8
≥5	0.77 (0.63–0.87)	0.81 (0.74–0.86)	80.0
≥6	0.64 (0.49–0.76)	0.88 (0.82–0.92)	82.8
≥7	0.42 (0.29–0.57)	0.93 (0.89–0.96)	82.8
≥8	0.35 (0.22–0.49)	0.96 (0.91–0.98)	82.8

CI, confidence interval; ISI-3, Insomnia Severity Index Short Form; SCID, Structured Clinical Interview for the Diagnostic and Statistical Manual of Mental Disorder, 5th Edition.