Aging has been described as an extremely complex and multifactorial process, which is characterized by continuous universal, progressive and irreversible changes, which in turn are conditioned by environmental, social, educational and economic factors.
El envejecimiento es definido como un proceso extremadamente complejo y multifactorial, el cual se caracteriza por continuos cambios universales, progresivos e irreversibles, los que a su vez se encuentran condicionados por factores ambientales, sociales, educacionales y económicos.