Regardless of age-related losses, the majority of adults in their sixties and seventies reported being their lives.

Despite age-related losses, most adults in their sixties and seventies reported being "in control of their lives".  

Explanation:

This question aims to show how regardless of deaths as a result of aging, majority of the adults in their sixties and seventies are still much in control of the lives and hence the cause of their deaths are not as a result of not being in control or not having the level of independence they want.

rain should be the answer.