Psychometric evidence of the adaptation to the Brazilian context of the Childhood Mania Rating Scale - Parent/Guardian Version (CMRS-P).

Aim: To carry out the process of cross-cultural adaptation of the Child Mania Rating Scale - Parent Version (CMRS-P) for the Brazilian context.

Method: Statistical procedures were carried out, based on the analysis of the validity of the internal structure of the scale, as well as its relationship with external variables. 224 parents/guardians of children/adolescents aged between five and 18 years participated in the study. The data collection form included instruments for assessing (hypo)manic symptoms, irritability, inattention, hyperactivity, emotional symptoms and behavioral problems. Data were collected in person, at a public school and at a Psychosocial Care Center, and online (via Google forms). Exploratory and confirmatory factor analyses, measurement invariance analyses, reliability analyzes were performed, as well as convergent and concurrent validity analyses.

Results: The one-dimensional model was investigated, showing satisfactory results, similar to those of the original scale. A reduced version was proposed with the ten most robust items from this study. Validity analyzes based on hypotheses indicated higher scores among those subjects with more clinical problems, such as the previous existence of a psychiatric diagnosis. Statistically significant and positive correlations, of low and moderate magnitudes, were observed with the scores of the other instruments used.

Final considerations: The results indicated that the adapted versions of the CMRS-P (full scale and reduced form) are promising instruments for use in the country.