[en] Abbreviated Depression, Anxiety and Stress Scales (DASS-21): validity, reliability and equity in Peruvian adolescents. In recent years, an increasing prevalence of psychological disorders in adolescence, particularly anxiety and depression, has been observed. Despite their clinical importance, these emotional disorders are not addressed in a timely manner, among other reasons due to the lack of instruments for this age group. For this reason, this instrumental design study sought to analyze the validity, reliability and equity of the Abbreviated Depression, Anxiety and Stress Scales (DASS-21). 731 Peruvian adolescents between the ages of 14 and 17 (M = 15.46; SD = 1.00, 54% male), from three public educational institutions in the constitutional province of Callao participated. Evidence of content validity was analyzed and the 21 test items were statistically examined. Confirmatory factor analysis showed the relevance of the three-factor model: X2 / gl = 2.87, CFI = .91, TLI = .89, RMSEA = .05 and SRMR = .04. It was confirmed that stress is a predictor of anxiety (r = .88, r2 = .76) and depression (r = .86, r2 = .74), and that anxiety and depression (r = .86, r2 = .73) that these usually manifest together. The internal consistency coefficients alpha and omega > .80 demonstrate the high reliability of the three scales. Finally, the factor invariance analysis indicated that the instrument is equivalent according to age and sex. It is concluded that the DASS-21 has psychometric evidence for its use as a screening instrument in Peruvian adolescents. However, it is suggested to carry out future investigations to obtain more evidence of validity, reliability and invariance, and to elaborate normative data

[es] En los últimos años se ha observado un creciente aumento de los trastornos psicológicos en la adolescencia, particularmente de ansiedad y depresión. A pesar de su importancia clínica, estos desórdenes emocionales no son abordados oportunamente, entre otras razones por la escasez de instrumentos para este grupo etario. Por ello, en este estudio de diseño instrumental se buscó analizar la validez, fiabilidad y equidad de las Escalas Abreviadas de Depresión, Ansiedad y Estrés (DASS-21). Participaron 731 adolescentes peruanos con edades entre 14 y 17 años (M = 15.46; DE = 1.00, 54% hombres), provenientes de tres instituciones educativas públicas de la provincia constitucional del Callao. Se analizaron las evidencias de validez de contenido y se examinaron estadísticamente los 21 ítems del DASS-21. El análisis factorial confirmatorio mostró la pertinencia del modelo de tres factores: X2/gl = 2.87, CFI = .91, TLI = .89, RMSEA = .05 y SRMR = .04. Se corroboró que el estrés es predictor de ansiedad (r = .88, r2 = .76) y depresión (r = .86, r2 = .74), y que ansiedad y depresión (r =.86, r2 =.73) suelen manifestarse en conjunto. Los coeficientes de consistencia interna alfa y omega > .80 demuestran la alta fiabilidad de las tres escalas. Finalmente, el análisis de invarianza factorial indicó que el instrumento es equivalente según edad y sexo. Se concluye que las escalas DASS-21 cuentan con evidencias psicométricas para su aplicación como instrumento de cribado en adolescentes peruanos. No obstante, se sugiere realizar futuras investigaciones para obtener mayores evidencias de validez, fiabilidad y equidad, y elaborar datos normativos