The elderly According WHO,elderly means Age more than 65 years. Four groups: 100y 85y oldest old 75y oldold 65y middle old young old 2According WHO, elderly means Age more than 65 years. Four groups: The elderly 75y 65y y o u n g o l d m i d d l e o l d According WHO, elderly means Age more than 65 years. The elderly 85y 100y o l d e s t o l d 2 m i d d l e o l d o l d o l d o l d o l d