einstein (São Paulo). 01/Dec/2016;14(4):486-93.

Short version of the Depression Anxiety Stress Scale-21: is it valid for Brazilian adolescents?

Hítalo Andrade da Silva, Muana Hiandra Pereira dos Passos, Valéria Mayaly Alves de Oliveira, Aline Cabral Palmeira, Ana Carolina Rodarti Pitangui, Rodrigo Cappato de Araújo

DOI: 10.1590/s1679-45082016ao3732

ABSTRACT
Objective
To evaluate the interday reproducibility, agreement and validity of the construct of short version of the Depression Anxiety Stress Scale-21 applied to adolescents.
Methods
The sample consisted of adolescents of both sexes, aged between 10 and 19 years, who were recruited from schools and sports centers. The validity of the construct was performed by exploratory factor analysis, and reliability was calculated for each construct using the intraclass correlation coefficient, standard error of measurement and the minimum detectable change.
Results
The factor analysis combining the items corresponding to anxiety and stress in a single factor, and depression in a second factor, showed a better match of all 21 items, with higher factor loadings in their respective constructs. The reproducibility values for depression were intraclass correlation coefficient with 0.86, standard error of measurement with 0.80, and minimum detectable change with 2.22; and, for anxiety/stress: intraclass correlation coefficient with 0.82, standard error of measurement with 1.80, and minimum detectable change with 4.99.
Conclusion
The short version of the Depression Anxiety Stress Scale-21 showed excellent values of reliability, and strong internal consistency. The two-factor model with condensation of the constructs anxiety and stress in a single factor was the most acceptable for the adolescent population.

Short version of the Depression Anxiety Stress Scale-21: is it valid for Brazilian adolescents?

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