Screening for depression in primary care with Patient Health Questionnaire-9 (PHQ-9): A systematic review.
Costantini LDepartment of Medicine and Surgery, University of Parma, Parma, Italy. Electronic address: luigi.costantini1@studenti.unipr.it.
Pasquarella CDepartment of Medicine and Surgery, University of Parma, Parma, Italy.
Odone AVita-Salute San Raffaele University, Milan, Italy.
Colucci MEDepartment of Medicine and Surgery, University of Parma, Parma, Italy.
Costanza ADepartment of Psychiatry, Faculty of Medicine, University of Geneva (UNIGE), Geneva, Switzerland; Department of Psychiatry, ASO Santi Antonio e Biagio e Cesare Arrigo Hospital, Alessandria, Italy.
Serafini GDepartment of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Section of Psychiatry, University of Genoa, Genoa, Italy; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
Aguglia ADepartment of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Section of Psychiatry, University of Genoa, Genoa, Italy; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
Belvederi Murri MInstitute of Psychiatry, Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy.
Brakoulias VSchool of Medicine, Western Sydney University, Blacktown Hospital, Sydney, NSW, Australia.
Amore MDepartment of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Section of Psychiatry, University of Genoa, Genoa, Italy; IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
Ghaemi SNDepartment of Psychiatry, Tufts University, Boston, MA, USA; Department of Psychiatry, Harvard Medical School, Boston, MA, USA.
Amerio ADepartment of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), Section of Psychiatry, University of Genoa, Genoa, Italy; IRCCS Ospedale Policlinico San Martino, Genoa, Italy; Department of Psychiatry, Tufts University, Boston, MA, USA.
English
BACKGROUND Depression is a leading cause of disability. International guidelines recommend screening for depression and the Patient Health Questionnaire 9 (PHQ-9) has been identified as the most reliable screening tool. We reviewed the evidence for using it within the primary care setting.
METHODS We retrieved studies from MEDLINE, Embase, PsycINFO, CINAHL and the Cochrane Library that carried out primary care-based depression screening using PHQ-9 in populations older than 12, from 1995 to 2018.
RESULTS Forty-two studies were included in the systematic review. Most of the studies were cross-sectional (N=40, 95%), conducted in high-income countries (N=27, 71%) and recruited adult populations (N=38, 90%). The accuracy of the PHQ-9 was evaluated in 31 (74%) studies with a two-stage screening system, with structured interview most often carried out by primary care and mental health professionals. Most of the studies employed a cut-off score of 10 (N=24, 57%, total range 5 - 15). The overall sensitivity of PHQ-9 ranged from 0.37 to 0.98, specificity from 0.42 to 0.99, positive predictive value from 0.09 to 0.92, and negative predictive value from 0.8 to 1.
LIMITATIONS Lack of longitudinal studies, small sample size, and the heterogeneity of primary-care settings limited the generalizability of our results.
CONCLUSIONS PHQ-9 has been widely validated and is recommended in a two-stage screening process. Longitudinal studies are necessary to provide evidence of long-term screening effectiveness.