PHQ-9 as a Multipurpose Instrument for Depression

✅ True

📌 What is PHQ-9?

The PHQ-9 (Patient Health Questionnaire-9) is a clinically validated, widely used mental health screening tool. It consists of 9 questions based on the diagnostic criteria for major depressive disorder from the DSM (Diagnostic and Statistical Manual of Mental Disorders).

🧪 Multipurpose Use of PHQ-9

• Screening: Helps identify potential depression in individuals during routine checkups or mental health assessments.
• Diagnosing: Aids clinicians in confirming a diagnosis of depressive disorder based on reported symptoms and severity.
• Monitoring: Tracks changes in symptoms over time, especially helpful during follow-up visits or ongoing therapy.
• Measuring Severity: Assigns a numerical score (0–27) to reflect the intensity of depressive symptoms—categorized as mild, moderate, or severe depression.

📊 Scoring Interpretation

PHQ-9 score ranges:
• 0–4: Minimal depression
• 5–9: Mild depression
• 10–14: Moderate depression
• 15–19: Moderately severe depression
• 20–27: Severe depression

🎯 Clinical Relevance

The PHQ-9 is recommended in primary care, psychology, psychiatry, and public health settings due to its efficiency, ease of use, and strong diagnostic utility. It is also recognized by the WHO and other global health organizations.

Therefore, the statement is TRUE—PHQ-9 is indeed a multipurpose instrument for screening, diagnosing, monitoring, and measuring the severity of depression.