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Table 3.5.24 Sensitivity and specificity of, PHQ-9 with structured<br />

or semistructured interviews as reference standard.<br />

Author<br />

Year<br />

Reference<br />

Country<br />

Study design<br />

Setting<br />

Population<br />

Inclusion & exclusion criteria<br />

Prevalence<br />

Index test<br />

Reference test<br />

Number of patients<br />

Drop-out rate<br />

Rater<br />

Rater training<br />

Interobserver reliability<br />

Sensitivity<br />

Specificity<br />

Study quality<br />

Comments<br />

Wittkampf et al<br />

2009<br />

[89]<br />

The Netherlands<br />

Design<br />

Cross sectional<br />

Setting<br />

23 family<br />

practitioners (FP)<br />

Population<br />

Patients from high risk groups<br />

(unexplained somatic complaints,<br />

frequent attendees and new<br />

mental health problems) were<br />

selected by FP from consultation<br />

lists or patient databases<br />

Inclusion criteria<br />

Symptoms within 3 months<br />

Exclusion criteria<br />

Other psychiatric diseases,<br />

somatic problems, language<br />

problems<br />

Index test<br />

PHQ-9<br />

Reference test<br />

SCID-I<br />

Telephone interviews<br />

Number of patients<br />

n=664 (443 females)<br />

with PHQ-9 score >5<br />

280 with PHQ-9 score

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