The patient health questionnaire-9 (PHQ-9) is one of the most widely used self-report
instruments in primary care. There is no criterion validity of the PHQ-9 in Colombia. The …

Background The PHQ-2 is a screening test for major depressive disorder (MDD) derived
from PHQ-9, which has shown to be useful in the detection of cases of clinical significance in …

Background: Simple and brief questionnaires with adequate psychometric properties are
useful for the early detection of depressive disorders. Aim: To analyze the psychometric …

Abstract Background The Patient Health Questionnaire-9 (PHQ-9) is a brief tool to assess
the presence and severity of depressive symptoms. This study aimed to validate and …

Background The prevalence of major depressive disorder (MDD) in Spanish primary care
(PC) centres is high. However, MDD is frequently underdiagnosed and consequently only …

Background Depressive disorders are frequently under diagnosed in resourcelimited
settings because of lack of access to mental health care or the inability of healthcare …

Background: The Patient Health Questionnaire depression module (PHQ-9) is a brief (10
items) screening and monitoring measure designed for use in primary care settings that …

Background The PHQ-4 is a widely used open access screening instrument for depression
and anxiety in different health care and community settings; however, empirical evidence of …

BackgroundPrimary health care (PHC) professionals may play a crucial role in improving
early diagnosis of depressive disorders. However, only 50% of cases are detected in PHC …

Background: This study aimed to assess the measurement properties (reliability, factor
structure, and criterion validity) of the Patient Health Questionnaire (PHQ-9) as an instrument …