Depression Screening (PHQ-9)

Answer the 9 PHQ-9 questions to screen for symptoms of depression. It is the most widely used depression questionnaire in the world.

9 questions · About 3 minutes

Nine questions about the last two weeks

The PHQ-9 (Patient Health Questionnaire-9) is the standard screening tool for depression. Developed by Drs. Kroenke, Spitzer and Williams, it is based on the nine diagnostic criteria for major depressive disorder in the DSM.

For each symptom, choose how often it has bothered you. It takes about 3 minutes.

A screening tool, not a diagnosis. Your answers stay in your browser; nothing is stored or sent.

Understanding depression

Depression (major depressive disorder) is one of the most common mental health conditions, affecting over 280 million people worldwide. It involves persistent sadness, loss of interest in activities, and a range of physical and cognitive symptoms that make daily life harder.

Depression is highly treatable. Cognitive-behavioural therapy (CBT) and interpersonal therapy have strong evidence behind them. Antidepressants (SSRIs, SNRIs) are effective for moderate to severe depression. Regular exercise, social connection, enough sleep and good nutrition play important supporting roles. Early identification through screening tools like the PHQ-9 makes timely help possible.

Frequently asked questions

What is the PHQ-9 depression screening?

The PHQ-9 (Patient Health Questionnaire-9) is a validated, self-administered screening tool for depression. Developed by Drs. Kroenke, Spitzer, and Williams, it consists of 9 questions based on DSM criteria for major depressive disorder. It is the most widely used depression screening instrument in the world.

How reliable is the PHQ-9 for detecting depression?

The PHQ-9 has been extensively validated across diverse populations. At a cutoff score of 10, it has a sensitivity of 88% and specificity of 88% for detecting major depression. It is reliable for monitoring symptom severity over time and measuring treatment response. However, it is a screening tool and should not be used alone for diagnosis.

What should I do if I score high on the PHQ-9?

If you score 10 or above on the PHQ-9, professional evaluation is recommended. Contact your primary care provider, a mental health professional, or a counselling service. Effective treatments for depression include cognitive-behavioural therapy (CBT), interpersonal therapy, medication (SSRIs, SNRIs), and lifestyle changes. If you have thoughts of self-harm, please contact a crisis helpline immediately.