• Márcia N F de C Pinto, Rogério de M C Pinto, Tânia M da S Mendonça, Camilla G Souza, and Carlos Henrique M da Silva.
• Faculty of Medicine, Federal University of Uberlândia, Av. Pará, bloco 2U, 1720, Umuarama, Uberlândia, MG, 38400-902, Brazil. mneyza@hotmail.com.
• Qual Life Res. 2020 Jul 1; 29 (7): 1987-1997.

ObjectiveThis paper goal was to validate the Portuguese version (Brazil/Portugal) of the Anger, Anxiety, and Depressive Symptoms item banks of the Pediatric PROMIS® Emotional Distress domain (version 1.0) for the Brazilian and Portuguese pediatric population.MethodThe total of 1216 participants answered a self-applied version of the Portuguese Anger, Anxiety, and Depressive Symptoms item banks. Reliability was assessed through internal consistency, test-retest reliability, and total information curve (TIC). Confirmatory Factor Analysis (CFA) with a bifactor model was used to confirm construct validity and IRT assumptions. Item calibration was performed according to Graded Response Model (GRM). Differential Item Functioning (DIF) was analyzed according the participants' age, gender, health condition (healthy versus chronic disease), and language.ResultsInternal consistency reliability (Cronbach's alpha coefficient = 0.84) and test-retest reliability (intraclass correlation = 0.93) were accurate. Unidimensionality, Local Independency, and construct validity were verified by CFA (CFI = 0.93; TLI = 0.93; RMSEA = 0.05; χ2 = 3052.4 with DIF = 557 and P value = 0.595). GRM was adjusted, and Emotional Distress had a satisfactory coverage. DIF was not significant.ConclusionThe results obtained indicate the adequacy of the psychometric properties of the Portuguese version (Brazil/Portugal) of the Anger, Anxiety, and Depressive Symptoms item banks of the Pediatric PROMIS® Emotional Distress domain.

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