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Multicenter Study
. 2005 Aug;20(8):738-42.
doi: 10.1111/j.1525-1497.2005.0144.x.

Assessing depression in primary care with the PHQ-9: can it be carried out over the telephone?

Alejandra Pinto-Meza  1 , Antoni Serrano-Blanco, Maria T Peñarrubia, Elena Blanco, Josep Maria Haro
Affiliations
Multicenter Study

Assessing depression in primary care with the PHQ-9: can it be carried out over the telephone?

Alejandra Pinto-Meza et al. J Gen Intern Med. 2005 Aug.

Abstract

Background: Telephone assessment of depression for research purposes is increasingly being used. The Patient Health Questionnaire 9-item depression module (PHQ-9) is a well-validated, brief, self-reported, diagnostic, and severity measure of depression designed for use in primary care (PC). To our knowledge, there are no available data regarding its validity when administered over the telephone.

Objective: The aims of the present study were to evaluate agreement between self-administered and telephone-administered PHQ-9, to investigate possible systematic bias, and to evaluate the internal consistency of the telephone-administered PHQ-9.

Methods: Three hundred and forty-six participants from two PC centers were assessed twice with the PHQ-9. Participants were divided into 4 groups according to administration procedure order and administration procedure of the PHQ-9: Self-administered/Telephone-administered; Telephone-administered/Self-administered; Telephone-administered/Telephone-administered; and Self-administered/Self-administered. The first 2 groups served for analyzing the procedural validity of telephone-administered PHQ-9. The last 2 allowed a test-retest reliability analysis of both self- and telephone-administered PHQ-9. Intraclass correlation coefficient (ICC) and weighted kappa (for each item) were calculated as measures of concordance. Additionally, Pearson's correlation coefficient, Student's t-test, and Cronbach's alpha were analyzed.

Results: Intraclass correlation coefficient and weighted kappa between both administration procedures were excellent, revealing a strong concordance between telephone- and self-administered PHQ-9. A small and clinically nonsignificant tendency was observed toward lower scores for the telephone-administered PHQ-9. The internal consistency of the telephone-administered PHQ-9 was high and close to the self-administered one.

Conclusions: Telephone and in-person assessments by means of the PHQ-9 yield similar results. Thus, telephone administration of the PHQ-9 seems to be a reliable procedure for assessing depression in PC.

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References

    1. World Mental Health Survey Consortium. Prevalence, severity, and unmet need for treatment of mental disorders in the World Health Organization World Mental Health Survey. JAMA. 2004;291:2581–90. - PubMed
    1. Regier DA, Narrow WE, Rae DS, Manderscheid RW, Locke BZ, Goodwin FK. The de facto US mental and addictive disorders service system. Arch Gen Psychiatr. 1993;50:85–94. - PubMed
    1. Narrow WE, Regier DA, Rae DS, Manderscheid RW, Locke BZ. Use of services by persons with mental and addictive disorders. Arch Gen Psychiatr. 1993;50:95–107. - PubMed
    1. Murlow CD, Williams JW, Gerety MB, Ramirez G, Montiel OM, Kerber C. Case-finding instruments for depression in primary care settings. Ann Intern Med. 1995;122:913–21. - PubMed
    1. Williams JW, Noël PH, Cordes JA, Ramirez G, Pignone M. Is this patient clinically depressed? JAMA. 287:1160–70. - PubMed

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