Table 3.

Performance of the GAD-2 in detecting anxiety disorder among patients in routine care^* (N=1 196)

Cut-point	Sensitivity (%)	Specificity (%)	Correctly classified (%)	LR+	LR−
≥0	100	0	1.42	1.00	0,00
≥1	88.24	35.03	35.79	1.36	0.34
≥2	82.35	56.74	57.11	1.90	0.31
≥3	58.82	75.66	75.42	2.42	0.54
≥4	11.76	87.11	86.04	0.91	1.01
≥5	0	94.49	93.14	0.00	1.06
≥6	0	96.10	94.73	0.00	1.04
>6	0	100	98.58	1.00	1.00

GAD-2 = Generalized Anxiety Disorder measure; LR+ = likelihood ratio positive; LR− = likelihood ratio negative.

^*Adult Primary Care assessment by the primary healthcare nurse was used as a diagnostic reference standard.