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Dr Roger Henderson
Reviewed by Roger HendersonReviewed on 29.04.2024 | 3 minutes read

PHQ-9 is a questionnaire that is used to help assess the severity of depression. The name stands for patient health questionnaire and the 9 is because there are 9 questions that ask about different symptoms and how often you experience them.

Each answer is assigned a number of points out of 3 and once you add the points from the 9 questions you will have a score out of 27.

If you score 5 points or more, this suggests mild depression severity, 10 points and more for moderate, 15 points and more for moderately severe and 20 points or more for severe depression severity.

The questionnaire isn’t for diagnosing depression but for assessing severity.

Is depression common?

Depression is the most common mental health condition and affects many people across the world although it can affect people in different ways. It is a medical condition that can be serious, however many cases of depression can improve over time with treatments such as lifestyle changes and talking therapies to get them on their way to recovery, but it is important to seek help early if you notice any persistent symptoms of depression.

When should I see my doctor?

You should book to see your doctor if you think you have depression, it is important to seek help early. You should speak to a medical professional urgently if you are having suicidal thoughts or have or plan to self-harm. You can get urgent help via your doctor, 111, or by attending A+E which is a safe place during a crisis.

What will the doctor do

Doctors or other healthcare professionals use the PHQ-9 questionnaire alongside their professional judgement for helping assess the severity of depression and for tracking any changes over time or the course of treatment. They may also ask about your current symptoms, how long you’ve had them for, your social situation and your past medical history.

If your depression is mild the doctor may recommend any relevant lifestyle changes and then monitor how you progress. They may also add in a talking therapy such as cognitive behavioural therapy (CBT) - which works on learning about negative thoughts, and how they affect how you feel, and how to process them and adapt those thoughts. The doctor will keep an eye on how you are doing and whether these interventions are helping.

If you have prolonged depression or moderate depression the doctor may prescribe you an antidepressant alongside talking therapy.

If you have severe depression the doctor may refer you to a specialist mental health team for support alongside prescribing antidepressants and talking therapies. In a small number of cases of severe depression, the doctor may feel you are at significant risk to yourself they may refer you to hospital.

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Dr Roger Henderson
Reviewed by Roger Henderson
Reviewed on 29.04.2024
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