RESUMO
Opinion surveys on health issues are considered health promotion tools. However, no studies have confirmed this in deceased organ donation for transplantation. This study aimed to analyse the impact of completing an opinion questionnaire about deceased organ donation on the attitude towards organ donation among the adolescent population. This longitudinal study with repeated measurements of attitude towards deceased organ donation was conducted with an adolescent population. The measurement instrument was a validated questionnaire of the attitude towards organ donation (PCID-DTO-Ríos). The study process involved the application of the questionnaire at an initial time, 1 month later, and 6 months later. A total of 1374 adolescents participated in this study. The favourable attitude towards donation was 43.1%, which fell to 41.4% at 1 month (P = 0.145), and to 39.7% at 6 months (P = 0.019). Changes in the attitude were observed in all groups, both 1 and 6 months after the questionnaire was completed. There was no objective relationship between the adolescent's socio-family environment and the effect of completing the questionnaire on their attitude towards deceased organ donation. In conclusion, the opinion questionnaire was not useful for promoting organ donation and did not have a positive effect on adolescents' attitudes towards organ donation in the medium or long term.