Table 1.

Sensitivity and Specificity of Major Depression Inventory at various cut-off levels. The optimum is at level 26/27

Score level	True negative (tn)	False possitive (fp)	False negative (fn)	True possitive (tp)	Sensitivity (Sn)	Specificity (Sp)
20\21	57	11	4	26	0.86	0.83
21\22	58	10	4	26	0.86	0.85
22\23	60	8	4	26	0.86	0.88
23\24	60	8	4	26	0.86	0.88
24\25	62	6	4	26	0.86	0.91
25\26	63	5	4	26	0.86	0.92
26\27	64	4	4	26	0.86	0.94
27\28	65	3	6	24	0.80	0.95
28\29	66	2	10	20	0.66	0.97
29\30	66	2	10	20	0.66	0.97
30\31	66	2	10	20	0.66	0.97
31\32	66	2	12	18	0.60	0.97
32\33	66	2	4	16	0.80	0.97
33\34	66	2	8	12	0.60	0.97
34\35	67	1	20	10	0.33	0.98
35\36	67	1	24	6	0.20	0.98