Table 3

Classification of patients with eventual GAD and MDE.

Generalized Anxiety Disorder (GAS-Q Positive 73/1,238 = 5.9%)

Major Depressive Episode (DSQ Positive 125/1,385 = 9.0%)

Patients' HADS-A ≥ 8

GPs' CGI-S ≥ 3

Patients' HADS-D ≥ 8

GPs' CGI-S ≥ 3

Sensitivity / Specificity

0.89 / 0.75

0.52 / 0.85

0.80 / 0.88

0.79 / 0.81

Classification

% (95% CI)

% (95% CI)

% (95% CI)

% (95% CI)

True positive disorder

5.3 (4.1–6.5)*

3.1 (2.1–4.1)

7.2 (5.8–8.6)

7.1 (5.7–8.5)

False positive disorder

23.5 (21.1–25.9)*

14.1 (12.2–16.0)

10.9 (9.3–12.5)

17.3 (15.3–19.3)*

Observed disordered

28.8 (26.3–31.3)*

17.2 (15.1–19.3)

18.1 (16.1–20.1)

24.4 (22.1–26.7)*

True positive healthy

70.6 (68.1–73.1)

80.0 (77.8–82.2)*

80.1 (78.0–82.2)*

73.7 (71.4–76.0)

False positive healthy

0.6 (0.2–1.0)

2.8 (1.9–3.7)*

1.8 (1.1–2.5)

1.9 (1.2–2.6)

Observed healthy

71.2 (68.7–73.7)

82.8 (80.7–84.9)*

81.9 (79.9–83.9)*

75.6 (73.3–77.9)

Total rightly classified

75.9 (73.5–78.3)

83.1 (81.0–85.2)*

87.3 (85.5–89.1)*

80.8 (78.7–82.9)

Total wrongly classified

24.1 (21.7–26.5)*

16.9 (14.8–19.0)

12.7 (10.9–14.5)

19.2 (17.1–21.3)*

*The difference shows a statistical significance of p ≤ 0.05

Olssøn et al. BMC Psychiatry 2005 5:46   doi:10.1186/1471-244X-5-46