The International Depression Questionnaire (IDQ)
A Self-Report Measure of ICD-11 Depression
The International Depression Questionnaire (IDQ) is a self-report measure of ICD-11 Single Episode Depressive Disorder (ICD-11 diagnostic code 6A70). It can be used to generate severity scores and to identify cases meeting diagnostic criteria. The severity scoring method simply involves summing the scores of the 9 IDQ items producing a possible range of scores from 0 to 36. No cut-off scores are proposed, as caseness is defined by applying the ICD-11 diagnostic algorithm. The development and initial validation study can be found by clicking here.
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