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Related Concept Videos

Depression: Overview01:18

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Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
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Depressive disorders are a group of mental health conditions characterized by pervasive feelings of sadness, diminished pleasure in life, and a significant impact on daily functioning. These conditions are most prevalent in individuals during their 30s and affect women at twice the rate of men. Contrary to popular belief, younger individuals are generally more susceptible to these disorders than older adults. Two key types of depressive disorders include Major Depressive Disorder (MDD) and...
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Related Experiment Video

Updated: Dec 13, 2025

Author Spotlight: Unveiling the Connection Between Sleep Disorders and Cognitive Symptoms in Depression
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Assessing Depression in the Primary Care Setting.

Judy Haefner1, Mary Daly2, Sherry Russell3

  • 1University of Michigan-Flint jhaefner@umflint.edu.

Journal of Doctoral Nursing Practice
|August 6, 2020
PubMed
Summary
This summary is machine-generated.

The Patient Health Questionnaire-9 (PHQ-9) effectively identifies more adults with depression in primary care settings than self-reporting. This validated screening tool aids in early detection and treatment of depression.

Keywords:
Patient Health Questionnaire-9 (PHQ-9)Q 1 Depression Treatment Algorithmdepressionprimary care

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Area of Science:

  • Primary Care Medicine
  • Psychiatry
  • Mental Health Screening

Background:

  • Depression impacts 10% of US adults, often undetected, and is projected to be the second leading cause of disability globally.
  • Primary care providers face challenges in recognizing and treating depression, highlighting a need for improved screening methods.
  • Existing usual care relies on patient self-report, which may underestimate the prevalence of depression.

Purpose of the Study:

  • To evaluate the effectiveness of the Patient Health Questionnaire-9 (PHQ-9) in identifying depression in primary care patients.
  • To compare the PHQ-9 screening tool's diagnostic yield against the clinic's usual care practice of patient self-report.
  • To assess the implementation of an evidence-based screening tool for identifying at-risk individuals in primary care.

Main Methods:

  • A study involving 200 primary care patients was conducted.
  • The Patient Health Questionnaire-9 (PHQ-9) screening tool was administered to assess depression.
  • Results were compared to the clinic's usual care practice of patient self-report using chi-square analysis.

Main Results:

  • Significantly more patients were identified as moderately to severely depressed using the PHQ-9 compared to usual care.
  • Chi-square analysis revealed a significantly higher proportion of newly diagnosed depression cases in the PHQ-9 group (N=200, p < .01).
  • The PHQ-9 demonstrated efficiency and accuracy as a depression screening tool in the primary care setting.

Conclusions:

  • Implementing the PHQ-9 in primary care settings significantly improves the identification of patients with depression.
  • The PHQ-9 is an effective and accurate tool for screening depression, aiding clinicians in diagnosis.
  • Evidence-based screening tools like the PHQ-9 are crucial for addressing the unmet needs in primary care depression management.