In postindustrial countries, the leading factor contributing to the marked increase in difficulty in managing Activities of Daily Living (ADLs) after age 85 is primarily b. Diseases.
While a sedentary lifestyle, biological changes, and malnutrition can play significant roles in the overall health and functioning of older adults, chronic diseases such as cardiovascular disease, diabetes, arthritis, and cognitive impairments are often the most impactful in limiting the ability to perform ADLs as individuals age.