The aging process often results in a loss of memory, deteriorated intellectual function, decreased mobility, and higher rates of disease. Late adulthood is the stage of life from the 60s onward; it constitutes the last stage of physical change. Average life expectancy in the United States is around 80 years; however, this varies greatly based on factors such as socioeconomic status, region, and access to medical care. In general, women tend to live longer than men by an average of five years. During late adulthood the skin continues to lose elasticity, reaction time slows further, and muscle strength diminishes.