Table II.

Comparison of sensitivity, specificity and diagnostic accuracy.

	Denmark	Finland	Sweden	Norway
MDE
Sensitivity	0.56 (0.49–0.62)	0.66 (0.53–0.79)	0.71 (0.60–0.83)	0.75 (0.65–0.86)
Specificity	0.87 (0.86–0.88)	0.83 (0.81–0.85)	0.84 (0.82–0.86)	0.74 (0.72–0.76)
Youden Index	0.42 (0.36–0.49)	0.49 (0.36–0.62)	0.55 (0.43–0.67)	0.49 (0.38–0.60)
Psychiatric Case
Sensitivity	0.79 (0.74–0.84)	0.92 (0.85–1.00)	0.90 (0.82–0.98)	0.85 (0.76–0.94)
Specificity	0.74 (0.73–0.75)	0.49 (0.46–0.52)	0.42 (0.39–0.44)	0.63 (0.61–0.66)
Youden Index	0.53 (0.48–0.59)	0.42 (0.34–0.49)	0.31 (0.23–0.40)	0.49 (0.39–0.58)

Notes: MDE: Sensitivity and specificity of GPs' MDE diagnoses in Denmark, Finland, Norway, and Sweden. Diagnostic performance is expressed as the Youden Index. Parentheses represent 95% confidence intervals. Psychiatric case: Sensitivity, specificity, and Youden Index of the comparison between patients' psychiatric case status, as evaluated by the GP, and their DSQ status.