According to the most recent version of the National Health Survey (PNS 2013, in Portuguese), 6.2% of the Brazilian population above 18 years old were diagnosed with diabetes. The proportion was higher in women (7.0%) than in men (5.4%) and increased with age from 0.6% in the age group 18-29 years to 19.9% among people aged 64 and 75 years old. For those over 75 years old, the proportion of diagnosed diabetes was 19.6%. There was no significant difference among ethnic groups: black people (7.2%), white (6.7%) and mixed race (5.5%). The lower the educational level, the higher the proportion of diabetes (9.6% among people with less than 4 years of formal education) (Brazilian Ministry of Health, 2013b).

References:

Brazilian Ministry of Health. (2013b). Pesquisa Nacional de Saúde 2013: Percepção do estado de saúde, estilos de vida e doenças crônicas. https://biblioteca.ibge.gov.br/visualizacao/livros/liv91110.pdf