Investigação das propriedades psicométricas do Patient Health Questionnaire-9 para uma amostra da comunidade portuguesa
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2017
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O presente estudo teve como objetivo testar as propriedades psicométricas do
Patient Health Questionnaire-9 (PHQ-9) para a população portuguesa. Especificamente,
teve como objetivos testar a fiabilidade, validade convergente, divergente, preditiva e de
constructo do PHQ-9, assim como testar diferenças interindividuais nos sintomas
depressivos medidos pelo PHQ-9, em função de três grupos etários (jovens adultos, adultos
de meia-idade e idosos). Método: O estudo incluiu 1182 participantes, dos quais 952
(80.5%) eram mulheres e 229 (19.4%) homens, com idades compreendidas entre os 18 e os
96 anos. Para além do PHQ-9, foram utilizados o Inventário de Depressão de Beck-II
(BDI-II) e a Escala de Depressão Geriátrica (GDS) para avaliação da validade convergente
e a Escala de Desejabilidade Social de Marlowe-Crowne (MCSDS) para avaliação da
validade divergente. Resultados: A Análise Fatorial Confirmatória (AFC) revelou que a
solução unifatorial foi a que mais se adequou aos dados, tendo sido cumpridos todos os
critérios psicométricos de validade de construto. Foram encontrados bons níveis de
fiabilidade (α = .85), forte validade convergente com o BDI-II e com a GDS e fraca
associação entre o PHQ-9 e a MCSDS-SF II, o que atestou a validade divergente da
medida. Tal como hipotetizado, as mulheres apresentaram scores significativamente
superiores, mas não se verificaram diferenças no total do PHQ-9 em função dos grupos
etários. Conclusões: O PHQ-9 apresentou boas propriedades psicométricas iniciais na
população portuguesa. Implicações para a investigação foram também discutidas.
The present study aimed to test the psychometric properties of the Patient Health Questionnaire-9 (PHQ-9) for the Portuguese population. Specifically, it aimed to test the reliability, convergent, divergent, predictive and constructive validity of PHQ-9, as well as the interindividual differences in depressive symptoms measured by PHQ-9, more specifically in terms of three age groups (young adults, middle-aged adults and the elderly). Method: The study included 1182 participants, of which 952 (80.5%) were women and 229 (19.4%) men, aged between 18-96 years. In addition to PHQ-9 was used the Beck-II Depression Inventory (BDI-II) and the Geriatric Depression Scale (GDS) to assess convergent validity and the Marlowe-Crowne Social Desirability Scale (MCSDS) for assessment of divergent validity. Results: Through the Factorial Confirmatory Analysis (FCA) it was verified that the unifactorial solution is the most adequate, having fulfilled all the psychometric criteria of construct validity. Were found good reliability levels (α = .85), strong convergent validity with BDI-II and with GDS and a low association between PHQ-9 and MCSDS-SF II, which testified the divergent validity of the measure. As hypothesized, women presented significantly higher scores, but there were no differences in total PHQ-9 in function of age groups. Conclusions: The PHQ-9 presented good initial psychometric properties in the Portuguese population. Implications for research were also discussed.
The present study aimed to test the psychometric properties of the Patient Health Questionnaire-9 (PHQ-9) for the Portuguese population. Specifically, it aimed to test the reliability, convergent, divergent, predictive and constructive validity of PHQ-9, as well as the interindividual differences in depressive symptoms measured by PHQ-9, more specifically in terms of three age groups (young adults, middle-aged adults and the elderly). Method: The study included 1182 participants, of which 952 (80.5%) were women and 229 (19.4%) men, aged between 18-96 years. In addition to PHQ-9 was used the Beck-II Depression Inventory (BDI-II) and the Geriatric Depression Scale (GDS) to assess convergent validity and the Marlowe-Crowne Social Desirability Scale (MCSDS) for assessment of divergent validity. Results: Through the Factorial Confirmatory Analysis (FCA) it was verified that the unifactorial solution is the most adequate, having fulfilled all the psychometric criteria of construct validity. Were found good reliability levels (α = .85), strong convergent validity with BDI-II and with GDS and a low association between PHQ-9 and MCSDS-SF II, which testified the divergent validity of the measure. As hypothesized, women presented significantly higher scores, but there were no differences in total PHQ-9 in function of age groups. Conclusions: The PHQ-9 presented good initial psychometric properties in the Portuguese population. Implications for research were also discussed.
Descrição
Orientação: Diogo Lamela
Palavras-chave
MESTRADO EM PSICOLOGIA CLÍNICA E DA SAÚDE, PSICOLOGIA, PSICOLOGIA CLÍNICA, SINTOMATOLOGIA, DEPRESSÃO, PSICOMETRIA, TESTES PSICOLÓGICOS, PSYCHOLOGY, CLINICAL PSYCHOLOGY, SYMPTOMATOLOGY, DEPRESSION, PSYCHOMETRICS, PSYCHOLOGICAL TESTS