PHQ-9 – Patient Depression Questionnaire

PHQ-9 – Patient Depression Questionnaire

Over the last two weeks, how often have you been bothered by the following problems?

Little interest or pleasure in doing things :
Feeling down, depressed, or hopeless :
Trouble falling or staying asleep, or sleeping too much :
Feeling tired or having little energy :
Poor appetite or overeating :
Feeling bad about yourself or that you are a failure or have let yourself or your family down :
Trouble concentrating on things, such as reading the newspaper or watching television :
Moving or speaking so slowly that other people could have noticed. Or the opposite being so figety or restless that you have been moving around a lot more than usual :
Thoughts that you would be better off dead, or of hurting yourself :

The PHQ-9 is a validated tool to assess for depression.

Formula :

Points are given for each variable.

Explanation of Result :

1-4 : Minimal depression
5-9 : Mild depression
10-14 : Moderate depression
15-19 : Moderately severe depression
20-27 : Severe depression

* Please verify all calculations prior to clinical use.


  • Kroenke K, Spitzer RL, Williams JB. The PHQ-9: validity of a brief depression severity measure. J Gen Intern Med. 2001 Sep;16(9):606-13. PMID: 11556941.