| Full text | |
| Author(s): |
Rodolfo Furlan Damiano
[1]
;
Maurício Scopel Hoffmann
;
Natan Pereira Gosmann
;
Pedro Mario Pan
[4]
;
Eurípedes Constantino Miguel
[5]
;
Giovanni Abrahão Salum
Total Authors: 6
|
| Affiliation: | [1] Instituto de Psiquiatria, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo. Departamento de Psiquiatria - Brasil
[4] Universidade Federal de São Paulo. Departamento de Psiquiatria - Brasil
[5] Instituto de Psiquiatria, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo. Departamento de Psiquiatria - Brasil
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | Revista Brasileira de Psiquiatria; 2023-07-03. |
| 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. (AU) | |
| FAPESP's process: | 21/14379-8 - Psychiatric and cognitive manifestations associated with SARS-CoV-2 virus infection |
| Grantee: | Rodolfo Furlan Damiano |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |