More people in the United States are ending up with a chronic and disabling condition, ranging from arthritis (inflammation of the joints) to Alzheimer's disease (loss of brain function) mainly because:

This is because of People are living longer.

Explanation:Age-related diseases are illnesses that happen frequently in people as they get older. There is a correlation between age and diseases such as cardiovascular diseases, diabetes, arthritis, osteoporosis, Alzheimer’s disease and dementia etc.

As an individual ages, Many changes in the morphological features and functions occur when of which are decline in muscle and bone mass, reduction in cognitive and memory functions, decrease in sensory perceptions, reduction in sexual activity and an increased propensity to develop chronic diseases.

Although sometimes these diseases can be traced to an individual's genes and not necessarily age.

a: social security and social programs