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Prognosis

    Calc Function

  • Calcs that help predict probability of a diseaseDiagnosis
  • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
  • Disease is diagnosed: prognosticate to guide treatmentPrognosis
  • Numerical inputs and outputsFormula
  • Med treatment and moreTreatment
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PHQ-9 (Patient Health Questionnaire-9)

Objectifies degree of depression severity.

Over the last 2 weeks, how often have you been bothered by any of the following problems?
If any of the above were scored more than “Not at all”:

Advice

Final diagnosis should be made with clinical interview and mental status examination including assessment of patient’s level of distress and functional impairment.

Management

PHQ-9 Management Summary

Score Depression severity Comments
0-4 Minimal or none Monitor; may not require treatment
5-9 Mild Use clinical judgment (symptom duration, functional impairment) to determine necessity of treatment
10-14 Moderate
15-19 Moderately severe Warrants active treatment with psychotherapy, medications, or combination
20-27 Severe

Critical Actions

  • Perform suicide risk assessment in patients who respond positively to item 9 “Thoughts that you would be better off dead or of hurting yourself in some way.”
  • Rule out bipolar disorder, normal bereavement, and medical disorders causing depression.
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