Table 1

Sensitivity and specificity calculations

Clinical diagnosis

Test result


MINI positive

MINI negative

Total


PHQ-9 positive

A

B

A+B


PHQ-9 negative

C

D

C+D


Total

A+C

B+D

A+B+C+D


Sensitivity = A/(A+C)

Specificity = D/(D+B)

Predictive value (positive test results) = A/(A+B)

Predictive value (negative test results) = D/(D+C)

van Steenbergen-Weijenburg et al. BMC Health Services Research 2010 10:235   doi:10.1186/1472-6963-10-235

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