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Depressive and anxiety symptom severity

NV N Vogelzangs
PJ P de Jonge
JS J H Smit
SB S Bahn
BP B W Penninx
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The severity of depressive symptoms was measured using the 30-item self-report Inventory of Depressive Symptomatology (IDS; range 0–84).35 The IDS has been shown to have good psychometric properties with high correlations between the IDS and the Hamilton Depression Rating Scale and the Beck Depression Inventory-I (www.ids-qids.org). The severity of anxiety symptoms was measured by means of the 21-item self-report Beck Anxiety Inventory (BAI; range 0-63).36 The internal and test–retest reliability and validity of the BAI are well-established.36, 37 Individual items on the IDS and BAI are rated from 0 to 3.

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