Between the years of 2000 and 2050, the proportion of the world's population over 60 years of age will double from about 11% to 22%.1 The absolute number of people aged 60 years and older is expected to increase from 605 million to 2 billion over the same period.1 Aging is associated with an increase in a number of health conditions and unrecognized comorbidities that increase the risk of functional decline.’ 2 Early identification of changes in function can lead to recommendations for appropriate interventions aimed at preventing or slowing the disablement process.