Table 3:

Sensitivity and Specificity for Insomnia Diagnosis Cut-Off Scores (N=250)

ISI Scores	Insomnia Diagnosis (N=52/250)
Alternative Cut-Offs	Sensitivity	Specificity	% Correct
≥ 5	1.00 (0.91–1.00)	0.54 (0.47–0.61)	63.6
≥ 6	1.00 (0.91–1.00)	0.64 (0.57–0.71)	71.6
≥ 7	0.96 (0.86–0.99)	0.70 (0.63–0.76)	75.2
≥ 8	0.85 (0.71–0.93)	0.77 (0.71–0.83)	78.8
≥ 9	0.79 (0.65–0.88)	0.83 (0.77–0.88)	82.0
≥ 10	0.75 (0.61–0.86)	0.89 (0.83–0.93)	86.0
≥ 11	0.67 (0.53–0.79)	0.90 (0.85–0.94)	85.6
≥ 12	0.60 (0.45–0.73)	0.93 (0.89–0.96)	86.4
≥ 13	0.52 (0.38–0.66)	0.93 (0.89–0.96)	84.8
≥ 14	0.52 (0.38–0.66)	0.96 (0.92–0.98)	86.8
≥ 15	0.37 (0.24–0.51)	0.96 (0.93–0.98)	84.0