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Calculator: Depression screening by a nine-item Patient Health Questionnaire (PHQ-9) in adults

Calculator: Depression screening by a nine-item Patient Health Questionnaire (PHQ-9) in adults

Over the last two weeks, how often have you been bothered by any of 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 fidgety 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 in some way


Important: Inputs must be complete to perform calculation.

Total criteria point count:


PHQ-9 score interpretation

0 to 4 points: No depression
5 to 9 points: Mild depression
10 to 14 points: Moderate depression
15 to 19 points: Moderately severe depression
20 to 27 points: Severe depression

  • PHQ-9 is adapted from PRIME MD TODAY, developed by Drs. Robert L Spitzer, Janet BW Williams, Kurt Kroenke, and colleagues, with an educational grant from Pfizer Inc.

  1. Kroenke K, Spitzer RL. The PHQ-9: A new depression and diagnostic severity measure. Psychiatric Annals 2002; 32:509.
  2. Kroenke K, Spitzer RL, Williams JB. The PHQ-9: validity of a brief depression severity measure. J Gen Intern Med 2001; 16:606.
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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