Demographic characteristics of a population of people with moderate, severe and profound intellectual disability (mental handicap) over 50 years of age: age structure, IQ and adaptive skills.

Workers knocked on doors and checked service lists to find every adult over 50 with moderate, severe, or profound intellectual disability in one county.

They gave each person a short IQ test and asked carers about daily skills like eating, dressing, and toileting.

The team also counted how many showed serious aggression, self-injury, or property destruction.

Most of the 50-plus group could walk, feed themselves, and use the toilet without help.

Very few showed hard-to-manage behavior that needed heavy medication or restraints.

Skills stayed steady across age bands; the 80-year-olds looked much like the 55-year-olds.

Poppes et al. (2010) saw the opposite picture: 8 in 10 adults with profound ID hurt themselves or others weekly. The gap is real. Jones et al. (1992) mainly found higher-functioning people still living at home, while P et al. drew from both homes and institutions where more severe behavior clusters.

McSweeney et al. (2000) followed the same county adults for 35 years and showed most live into their 60s, backing up the idea that stable skills can last decades.

Fahmie et al. (2013) later confirmed little drop in well-being four years on, echoing the 1992 message: ageing alone does not wreck adaptive skills.

If you serve older adults with ID, expect steady skills, not automatic decline. Use this to fight age-based low expectations when you write goals. Screen for hearing loss (M, 1995) and plan for longer life (K et al., 2000), but keep teaching daily living and community skills; the ceiling may be higher than staff assume.