Translating measurement into practice: Brazilian norms for depressive symptom assessment with the Patient Health Questionnaire (PHQ-9)
Braz. J. Psychiatry (São Paulo, 1999, Impr.)
; 45(4): 310-317, Aug. 2023. tab, graf
Article
em En
|
LILACS-Express
| LILACS
| ID: biblio-1513826
Biblioteca responsável:
BR1.1
ABSTRACT
Objectives:
To provide practical norms for measuring depressive symptoms with the Patient Health Questionnaire 9 (PHQ-9) in Brazil through a state-of-the-art psychometrics analysis.Methods:
We used a large representative dataset from the 2019 Brazilian National Health Survey (Pesquisa Nacional de Saúde - 2019), which included 90,846 Brazilian citizens. To assess scale structure, we assessed a unidimensional model using confirmatory factor analysis. Item response theory was used to characterize the distribution of depressive symptoms. Summed- and mean-based PHQ-9 scores were then linked using item response theory-based scores in generalized additive models. Finally, percentiles, T scores, and a newly developed score, called the decimal score (D score), were generated to describe PHQ-9 norms for the Brazilian population.Results:
Confirmatory factor analysis revealed a good fit to the unidimensional model, being invariant to age and sex. Item response theory captured item-level information about the latent trait (reliable from 1 to 3 SDs above the mean). Brazilian norms were presented using summed scores, T scores, and D scores.Conclusion:
This is the first study to determine Brazilian norms for the PHQ-9 among a large representative sample using robust psychometric tools. More precise PHQ-9 scores are now available and may be widely used in primary and specialized clinical care settings.
Texto completo:
1
Base de dados:
LILACS
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Braz. J. Psychiatry (São Paulo, 1999, Impr.)
Assunto da revista:
PSIQUIATRIA
Ano de publicação:
2023
Tipo de documento:
Article
/
Project document
País de afiliação:
Brasil