Clinically significant depression is one of the most common disorders presenting in primary care. It is a frequent comorbid condition in patients who have a variety of medical illnesses. Depression is associated with impairments in major role function and premature mortality and is common, with a yearly prevalence of 8% and lifetime prevalence of 19%.1 Because of its relatively high prevalence and associated psychosocial morbidity, depression is one of the most disabling of all medical illnesses.
Zimmerman M. Using the 9-Item Patient Health Questionnaire to Screen for and Monitor Depression. JAMA. 2019;322(21):2125–2126. doi:10.1001/jama.2019.15883
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