The two professions associated with the lowest levels of death due to Alzheimer’s disease may be surprising.

Taxi and ambulance drivers were found to have the lowest proportion of deaths of more than 440 occupations that were considered in a new observation-based study from Massachusetts physicians.

Alzheimer’s disease is a type of dementia that affects memory, thinking, and behavior. It impacts millions of Americans and is one of the top 10 causes of death in the US.