Confirmatory factor analysis of the portuguese Depression Anxiety Stress Scales-21

Authors

  • João Luís Alves Apóstolo Escola Superior de Enfermagem de Coimbra; Unidade de Investigação em Ciências da Saúde
  • Barry Allen Tanner Life Stress Center; Detroit Receiving Hospital
  • Cynthia Lee Arfken Wayne State University; Department of Psychiatry and Behavioral Neurosciences

DOI:

https://doi.org/10.1590/S0104-11692012000300022

Keywords:

Factor Analysis, Translation, Adult, Questionnaires

Abstract

To determine which of three published models best characterizes the factor structure of the Portuguese version of the Depression Anxiety Stress Scales-21 and to assess its validity and reliability. Confirmatory factor analysis of Depression Anxiety and Stress Scale-21 for 1,297 adult, primary care outpatients (66.7% female, Mage = 48.57 years) comparing 3 models. The relationship between the Depression Anxiety Stress Scales-21 and the Positive and Negative Affect Schedule was analyzed. The correlated 3-factor model fit the data best. The scale demonstrated good internal consistency, with alpha scores of the subscales ranging from 0.836 to 0.897. Correlation with the Positive and Negative Affect Schedule was positive and moderate with the negative affect scale; it was negative and limited with the positive affect. These findings support the correlated 3-factor structure. The test demonstrated adequate reliability and construct validity, which supports its use for screening in primary care settings with Portuguese speakers.

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Published

2012-06-01

Issue

Vol. 20 No. 3 (2012)

Section

Original Articles

License

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How to Cite

Confirmatory factor analysis of the portuguese Depression Anxiety Stress Scales-21. (2012). Revista Latino-Americana De Enfermagem, 20(3), 590-596. https://doi.org/10.1590/S0104-11692012000300022