Table 3.

Sensitivity and Specificity of SCL Single-Item Sleep Screeners in Predicting Overall Poor Sleep (PSQI >5) among U.S. Military Veterans

Item	No.	Response option	Sensitivity	Specificity	Efficiency	False-positive rate	False-negative rate
SCL-44: Trouble falling asleep	537	0	1.00	0.00	0.59	1.00	0.00
	259	1	0.73	0.78	0.75	0.23	0.27
	123	2	0.45	0.95	0.66	0.05	0.55
	116	3	0.29	0.98	0.58	0.02	0.71
	83	4	0.13	0.99	0.49	0.00	0.87
SCL-64: Awakening in the early morning	599	0	1.00	0.00	0.59	1.00	0.00
	258	1	0.58	0.70	0.63	0.30	0.42
	126	2	0.33	0.90	0.57	0.10	0.67
	86	3	0.18	0.96	0.50	0.04	0.82
	49	4	0.06	0.98	0.45	0.02	0.94
SCL-66: Sleep that is restless or disturbed	494	0	1.00	0.00	0.59	1.00	0.00
	284	1	0.74	0.70	0.73	0.30	0.26
	160	2	0.47	0.93	0.66	0.07	0.53
	111	3	0.25	0.97	0.55	0.03	0.75
	69	4	0.10	0.99	0.47	0.01	0.90