June 25, 2009

Study of the Discriminative Validity of the PHQ-9 and PHQ-2 in a Sample of Brazilian Women in the Context of Primary Health Care

Structured PICO

Do the PHQ-9 and PHQ-2 accurately screen for depression in Brazilian women in primary health care compared to the SCID-IV?

P

Population

177 Brazilian women in primary health care (60 cases of depression and 117 noncases)

I

Intervention

Patient Health Questionnaire (PHQ-9) and its reduced version (PHQ-2)

C

Comparator

SCID-IV (gold standard)

O

Outcome

Discriminative validity (cutoff scores for screening depression)patient reported

Abstract

PURPOSE: This study aimed to assess the discriminative validity of the Brazilian version of the Patient Health Questionnaire (PHQ-9) and of its reduced version (PHQ-2). DESIGN AND METHODS: The sample consisted of 177 women (60 cases of depression and 117 noncases). The SCID-IV was used as the gold standard. FINDINGS: For the PHQ-9, a cutoff score equal to or higher than 10 proved to be the most adequate for the screening of depression, whereas the best cutoff score for the PHQ-2 was found to lie between 3 and 4. PRACTICE IMPLICATIONS: The systematic use of these instruments in nursing and in the context of primary health care could favor the early detection of depression.

Study of the Discriminative Validity of the PHQ-9 and PHQ-2 in a Sample of Brazilian Women in the Context of Primary Health Care

Structured PICO

Abstract

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