What is PHQ-9?
The Patient Health Questionnaire-9 (PHQ-9) is a widely used psychological screening tool designed to assess the presence and severity of depressive symptoms. It is based on standard diagnostic criteria and is commonly used by psychologists, counsellors, and healthcare professionals across the world.
What does this assessment measure?
PHQ-9 evaluates key areas such as low mood, loss of interest, sleep disturbances, fatigue, appetite changes, feelings of worthlessness, concentration difficulties, psychomotor changes, and thoughts related to self-harm. Each question reflects an important dimension of depression.
How to administer this test?
Ask the individual to respond based on their experiences over the
last 2 weeks.
Each question must be answered by selecting one appropriate option.
Ensure the person feels comfortable and understands there are no right or wrong answers.
All questions should be answered for accurate scoring.
How scoring works?
Each item is scored from
0 to 3.
Total score ranges from
0 to 27.
Score Interpretation:
- 0 – 4 → Minimal
- 5 – 9 → Mild
- 10 – 14 → Moderate
- 15 – 19 → Moderately Severe
- 20 – 27 → Severe
Important Note:
This is a
screening tool and not a diagnostic instrument.
Final interpretation should always be supported by professional judgment.