PHQ-9 Depression Screening Calculator
PHQ-9 Depression Screening
Complete PHQ-9 questionnaire — rate each item for the past 2 weeks
Formula
PHQ-9 Total = Sum of 9 items (each scored 0-3) | Range: 0-27 | Minimal: 0-4 | Mild: 5-9 | Moderate: 10-14 | Moderately Severe: 15-19 | Severe: 20-27 | PHQ-2 = Items 1 + 2 (positive if >= 3)
Frequently Asked Questions
What is the PHQ-9?
The PHQ-9 (Patient Health Questionnaire-9) is a validated 9-item self-report tool used to screen for depression and monitor severity. Each item is scored 0-3, giving a total range of 0-27. It is widely used in primary care and research settings.
What PHQ-9 score indicates depression?
A score of 10 or higher suggests clinically significant depression warranting treatment. Scores of 5-9 indicate mild symptoms, 10-14 moderate, 15-19 moderately severe, and 20-27 severe depression. A score of 10+ has 88% sensitivity and 88% specificity for major depression.
How often should I take the PHQ-9?
In clinical settings, the PHQ-9 is typically administered at initial screening and then at follow-up visits (every 2-4 weeks) during treatment to monitor response. A decrease of 5 or more points is considered a clinically meaningful improvement.
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