Although DH affects all age groups, varying from 20–50 years, it most commonly peaks between 30–40 years. Females are more affected by DH. It can be said that this is due to females having diets high in erosive acids and diligent oral hygiene methods. Another contributing factor to this theory, is that females attend the dentist on a more regular basis, discuss health problems more readily than males which can lead to some bias in the DH being more prevalent in females. Hence the findings from some studies that DH does not significantly affect females over males.