PHQ-9 (depressão)
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
PHQ-9
About this calculator
The PHQ-9 calculator is an online tool that helps evaluate the level of depression in individuals. It uses the PHQ-9 scale, a widely used questionnaire in clinical practice to identify and monitor symptoms of depression.
The PHQ-9 is composed of nine questions that address different aspects of depression, such as feelings of sadness, loss of interest in activities, changes in appetite and sleep, among others. Each question is rated from zero to three, with zero indicating not present and three indicating present every day.
The total score of the PHQ-9 ranges from zero to 27, and the result is used to classify the severity of depression. The score can help healthcare professionals determine the need for intervention and choose the appropriate treatment.
Remember that the PHQ-9 is only an evaluation tool and does not replace a medical evaluation. If you are feeling anxious or depressed, it is essential to consult a healthcare professional for a complete evaluation and a treatment plan.
Frequently asked questions
What is the PHQ-9?
The PHQ-9 is a depression evaluation scale composed of nine questions that help identify and monitor symptoms of depression.
Who can use the PHQ-9?
The PHQ-9 is a tool that can be used by anyone who wants to evaluate their symptoms of depression, but it's essential to remember that evaluation and treatment should be done by a healthcare professional.
What does the PHQ-9 score mean?
The PHQ-9 score ranges from zero to 27 and is used to classify the severity of depression. A high score indicates a higher level of depression.
Is the PHQ-9 enough to diagnose depression?
No, the PHQ-9 is only an evaluation tool and is not enough to diagnose depression. A diagnosis needs to be made by a healthcare professional after a complete evaluation.
What should I do if I have a high score on the PHQ-9?
If you have a high score on the PHQ-9, it's essential to consult a healthcare professional for a complete evaluation and a treatment plan.