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PHQ-9 Depression Score Calculator (for Cardiac Patients)

  • Question 1: Little interest or pleasure in doing things
  • Question 2: Feeling down, depressed, or hopeless
  • Question 3: Trouble falling or staying asleep, or sleeping too much
  • Question 4: Feeling tired or having little energy
  • Question 5: Poor appetite or overeating
  • Question 6: Feeling bad about yourself — or that you are a failure or have let yourself or your family down
  • Question 7: Trouble concentrating on things, such as reading the newspaper or watching television
  • Question 8: 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
  • Question 9: Thoughts that you would be better off dead or of hurting yourself in some way
  • PHQ-9 Depression Score (for Cardiac Patients): Explanation and Clinical Context
    The PHQ-9 (Patient Health Questionnaire-9) is a widely used, validated tool to screen and measure the severity of depression, specifically useful in cardiac patients where depression is a known risk factor for worse cardiovascular outcomes.
    It includes 9 questions reflecting DSM-IV criteria for depression, scored from 0 (Not at all) to 3 (Nearly every day). The total score ranges from 0 to 27.
    Score interpretation is as follows: 0–4 minimal or none, 5–9 mild, 10–14 moderate, 15–19 moderately severe, and 20–27 severe depression.
    Using PHQ-9 in cardiac patients helps clinicians identify those at risk, guide timely referral for mental health interventions, and integrate psychosocial care into cardiovascular management.

    Reference:
    Kroenke K, Spitzer RL, Williams JB. The PHQ-9: Validity of a Brief Depression Severity Measure. J Gen Intern Med. 2001;16(9):606–613. doi:10.1046/j.1525-1497.2001.016009606.x
    Lichtman JH, et al. Depression and Coronary Heart Disease: Recommendations for Screening, Referral, and Treatment. Circulation. 2008;118:1768–1775. doi:10.1161/CIRCULATIONAHA.108.190769

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