Abstract
PURPOSE: Depression is a significant co morbidity of COPD patients and is associated with poor compliance to treatment, frequent hospitalization, prolong hospital stay, poor quality of life and increased cost of treatment. The prevalence of depression in stable COPD is widely variable. Patient Health Questionnaire (PHQ)-9 questionnaires is a standardized, validated, brief and easy diagnostic assessment tool for the depression. Hindi (local language) translation of PHQ-9 is well validated. No studies have been conducted to assess the prevalence of depression in different stages of COPD especially in India.
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