Recently, individuals with cerebral palsy (CP) have been reaching adulthood in greater proportions, making it relevant to understand the process of transition to adulthood, as well as the levels of autonomy in participation (AIP) of adolescents and young people with CP, which is little explored due to the lack of appropriate instruments, mainly for the Brazilian population. In this sense, the Rotterdam Transition Profile (RTP) is an instrument used to categorize AIP levels.

This study aimed to translate and validate the RTP construct and content for use in Brazil.

The study's translation and validation process followed the methodology and sample size established and recommended by the literature. The translation was performed by 3 professionals fluent in English and the version obtained in Portuguese was back translated into English, to be reviewed by the authors of the instrument. The construct validity of the RTP was investigated by a panel of 8 professionals, who received an online form containing instructions and the translated version of the RTP. At the end of this stage, 30 young adults aged between 13 and 35 years (mean=25; SD=6.9 years), diagnosed with CP and with a good cognitive level, provided data for content validation, in addition to sociodemographic information.

After two rounds of review with the authors, the final version translated into Portuguese was obtained and construct validity was established with agreement among professionals to change 3 items of the instrument. Content validity was demonstrated with suggestions for additional modifications to 2 of the same 3 items also pointed out during construct validity. In the end, changes were made to items 1 (education and employment) and 8 (care demands). The internal consistency analysis was considered good (Cronbach's alpha 0.820).

The Brazilian Portuguese version of the RTP was considered adequate and clear.

The instrument will support transition planning for person-centered care, highlighting the strengths and challenges faced by young people with CP during the transition to adulthood.