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Medical Disclaimer

ShapeUpAmerica.com provides clinical-grade calculation tools for educational and informational purposes only. The results are not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a licensed healthcare professional before making health-related decisions.

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CalculatorsMental Health & WellbeingPHQ-9 Depression Screening
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PHQ-9 Depression Screening

Standard clinical tool for screening depression severity.

Biometric Inputs

Real-time clinical computation active

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This assessment provides statistical probability and mathematical interpretation based on validated clinical equations. It is not a diagnostic tool.

Scientific Context

The Patient Health Questionnaire (PHQ-9) is an essential clinical instrument for screening, diagnosing, and monitoring the severity of depression. Used by healthcare professionals worldwide, it helps provide a clear, quantified baseline for emotional wellness based on nine critical areas of mental health.

Mathematical Formula

PHQ-9 Scoring Algorithm

Behind the Math

Developed by Drs. Robert Spitzer, Janet Williams, and Kurt Kroenke in the late 1990s, the PHQ-9 revolutionized mental healthcare by moving from long interviews to a high-precision, 3-minute screening.

Expert Tip

Be as honest as possible for the last 14 days of your life. Don't answer how you 'usually' feel, but how you have felt specifically in that two-week window.

Primary Use
Health Screening
Standard
WHO Guidelines
Complexity
Clinical Grade

Frequently Asked Questions

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