Darío Moreno-Agostino1,2,3, Kia-Chong Chua1, Tim J Peters4, Marcia Scazufca5, Ricardo Araya1. 1. Department of Health Service and Population Research; Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK. 2. Centre for Longitudinal Studies, UCL Social Research Institute, University College London, London, UK. 3. ESRC Centre for Society and Mental Health, King's College London, London, UK. 4. Population Health Sciences; Bristol Medical School, University of Bristol, Bristol, UK. 5. Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, Brazil.
Abstract
Objectives: To obtain evidence on the psychometric properties of the Patient Health Questionnaire - 9 (PHQ-9, one of the most extensively used tools for assessing depression) in the Brazilian older population.Method:Data on 3,356 Brazilian adults aged 60+ years living in Guarulhos, São Paulo state were used. The factor structure of the questionnaire was analysed using a factor analysis approach. The questionnaire's measurement equivalence was tested across gender, age, personal income, and education level groups. The scores were compared across groups based on the highest level of equivalence achieved. The questionnaire's internal consistency was analysed considering its factor structure. Results: A one-factor solution was identified as the most adequate factor structure, with the factor explaining 57.6% of the items' variance. The correlation of the resulting latent score with the overall raw sum score in the PHQ-9 was r = 0.96. Measurement equivalence regarding thresholds and loadings was achieved for all tested groups. On average, women, older, less educated, and poorer people had higher latent scores on the depression factor. The measure showed a good internal consistency with Revelle's omega total ωt=0.92. Conclusion: The results suggest that, among Brazilian older adults living in Guarulhos, São Paulo state, the PHQ-9 measures depressive symptomatology equivalently across different sociodemographic subgroups. Moreover, it can be scored using the raw sum of the item scores to adequately reflect different levels of depressive symptomatology.
Objectives: To obtain evidence on the psychometric properties of the Patient Health Questionnaire - 9 (PHQ-9, one of the most extensively used tools for assessing depression) in the Brazilian older population.Method:Data on 3,356 Brazilian adults aged 60+ years living in Guarulhos, São Paulo state were used. The factor structure of the questionnaire was analysed using a factor analysis approach. The questionnaire's measurement equivalence was tested across gender, age, personal income, and education level groups. The scores were compared across groups based on the highest level of equivalence achieved. The questionnaire's internal consistency was analysed considering its factor structure. Results: A one-factor solution was identified as the most adequate factor structure, with the factor explaining 57.6% of the items' variance. The correlation of the resulting latent score with the overall raw sum score in the PHQ-9 was r = 0.96. Measurement equivalence regarding thresholds and loadings was achieved for all tested groups. On average, women, older, less educated, and poorer people had higher latent scores on the depression factor. The measure showed a good internal consistency with Revelle's omega total ωt=0.92. Conclusion: The results suggest that, among Brazilian older adults living in Guarulhos, São Paulo state, the PHQ-9 measures depressive symptomatology equivalently across different sociodemographic subgroups. Moreover, it can be scored using the raw sum of the item scores to adequately reflect different levels of depressive symptomatology.
Authors: Carina Akemi Nakamura; Marcia Scazufca; Felipe Azevedo Moretti; Thiago Vinicius Nadaleto Didone; Mariana Mendes de Sá Martins; Luara Aragoni Pereira; Caio Hudson Queiroz de Souza; Gabriel Macias de Oliveira; Marcelo Oliveira da Costa; Marcelo Machado; Evelyn da Silva Bitencourt; Monica Souza Dos Santos; Jamie Murdoch; Pepijn van de Ven; Nadine Seward; William Hollingworth; Tim J Peters; Ricardo Araya Journal: Trials Date: 2022-09-07 Impact factor: 2.728
Authors: Marcia Scazufca; Carina A Nakamura; Nadine Seward; Darío Moreno-Agostino; Pepijn van de Ven; William Hollingworth; Tim J Peters; Ricardo Araya Journal: Lancet Healthy Longev Date: 2022-10