Previous research has also found significantly lower concentrations of testosterone in middle-aged and elderly men who developed Alzheimer's disease.

BBC: NEWS | Health | Sex hormone boost for Alzheimer's

They were made up entirely of middle-aged and elderly men.

ECONOMIST: The republican rumble down under

Reporters from Hong Kong's South China Morning Post saw villages "abandoned" by the young and middle-aged, leaving children and the elderly behind.

FORBES: Magazine Article

After flubbing several more elementary inquiries, a middle-aged fan hits me with a conundrum involving an elderly father, a broken foot and emergency transportation.

FORBES: Magazine Article

External stressors such as joblessness play a role. (National figures on whether suicides increased in the 2008 recession are not in yet, but suicides generally go up in bad economic times.) The very elderly once had the highest suicide rate, but middle-aged men and women, 45 to 54 (see graph, below), have surged recently and surpassed them.

FORBES: Medicine's Suicide Problem, Part 2

This role which has been in the possession of middle-aged or elderly actresses in France from Sarah Bernhardt to Marie Bell (in England Glenda Jackson and Diana Rigg), is here transformed by the delicate and young Ms Blanc.

ECONOMIST: A radical must for anyone interested in the art of theatre

And elderly people unable to work should get the same benefits as young people and middle-aged people unable to work.

ECONOMIST: Letters