This instrument is designed for screening purposes only and is not to be used as a diagnostic tool.
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Over the past 2 weeks, how often have you been bothered by any of the following problems?
Major depressive disorder (MDD) is suggested if:
• Of the 9 items, 5 or more are checked as at least ‘more than half the days’• Either item 1 or 2 is checked as at least ‘more than half the days’
Other depressive syndrome is suggested if:
• Of the 9 items, between 2 and 4 are checked as at least ‘more than half the days’• Either item 1 or 2 is checked as at least ‘more than half the days’
PHQ-9 scores can be used to plan and monitor treatment. To score the instrument, tally the numbers of all the checked responses under each heading (not at all=0, several days=1, more than half the days=2, and nearly every day=3). Add the numbers together to total the score on the bottom of the questionnaire.
The instrument also includes a functional health assessment. This asks the patient how emotional difficulties or problems impact work, life at home, or relationships with other people. Patient response of ‘very difficult’ or ‘extremely difficult’ suggest that the patient’s functionality is impaired. After treatment begins, functional status and number score can be measured to assess patient improvement.
Note: Depression should not be diagnosed or excluded solely on the basis of a PHQ-9 score. A PHQ-9 score ≥ 10 has a sensitivity of 88% and a specificity of 88% for major depression.1 Since the questionnaire relies on patient self-report, the practitioner should verify all responses. A definitive diagnosis is made taking into account how well the patient understood the questionnaire, as well as other relevant information from the patient.
PHQ-9 is adapted from PRIME MD TODAY, developed by Drs Spitzer, Williams, Kroenke and colleagues, with an educational grant from Pfizer Inc. Use of the PHQ-9 may only be made in accordance with the Terms of Use available at www.pfizer.com. Copyright © 1999 Pfizer Inc. All rights reserved. PRIME MD TODAY is a trademark of Pfizer Inc.
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.
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2. If you checked YES to more than one of the above, have several of these ever happened during the same period of time?
3. How much of a problem did any of these cause you — like being able to work; having family, money, or legal troubles; getting into arguments or fights?
4. Have any of your blood relatives (i.e., children, siblings, parents, grandparents, aunts, uncles) had manic-depressive illness or bipolar disorder?
5. Has a health professional ever told you that you have manic-depressive illness or bipolar disorder?
This questionnaire should be used as a starting point. It is not a substitute for a full medical evaluation. Bipolar disorder is a complex illness, and an accurate, thorough diagnosis can only be made through a personal evaluation by your doctor.
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Welcome to Davenport Behavioral Center, your trusted destination for comprehensive mental health evaluation, diagnosis, and treatment. Conveniently located in Champions Gate, Florida, our center offers a wide range of psychiatric services provided by Dr. Cruz, DNP—a highly experienced Psychiatrist and Psychiatric Mental Health Practitioner. With a decade of dedicated experience in the medical field, Dr. Cruz is double board certified in the state of Florida, specializing in psychiatry. Her passion for quality and individualized care ensures that each patient receives the utmost attention and support on their journey to mental health stability and wellness.
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