MAOA and diabetes mellitus: The present study detected in a sample of older adults diagnosed with diabetes mellitus (DM), systemic arterial hypertension (SAH), or both (DM and SAH) (DM/SAH) residing in the Federal District, Brazil, with the following MAOA uVNTR polymorphism's genotypes: 2R@ (female 2R/2R homozygote or male 2R∗ hemizygote); 3R@ (female 3R/3R homozygote or male 3R∗ hemizygote), 4R@ (female 4R/4R homozygote or male 4R∗ hemizygote), and 3R/4R (Table 1).