A population-based health survey of maladaptive behaviours associated with dementia in elderly people with learning disabilities.
Older adults with learning disabilities plus dementia show sharp rises in agitation, feeding issues, and aggression that put placement at risk.
01Research in Context
What this study did
The team looked at older adults with learning disabilities. They asked which problem behaviors show up once dementia begins.
Caregivers filled out a survey about 22 common issues. These included hitting, yelling, refusing food, and wandering.
What they found
Seventeen of the 22 behaviors were more common in the dementia group. Agitation, feeding trouble, and aggression topped the list.
The results show dementia brings a heavy new load of behaviors that can threaten home placement.
How this fits with other research
Takenoshita et al. (2026) later found one in three Japanese adults with Down syndrome had dementia. They added high cholesterol and poor eyesight as new, treatable risk factors.
Leon et al. (2018) zoomed in on yelling and screaming. Their descriptive assessment caught clear triggers and attention pay-offs, giving you a road map for function-based help.
Williams et al. (2002) took the next step. After a quick functional check, they used non-contingent attention to cut disruptive yelling in two dementia patients.
Richardson et al. (2008) followed adults with learning disabilities for eleven years. Serious behaviors usually stayed, backing up the idea that dementia-related problems are here to stay without support.
Why it matters
You now know dementia in clients with learning disabilities rarely travels alone. Expect agitation, meal refusal, and wandering to spike.
Start with a short descriptive check like Leon et al. (2018). Then borrow the Williams et al. (2002) playbook: deliver calm, scheduled attention before trouble starts. Plan early for long-term support because these behaviors tend to linger.
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Run a 15-minute descriptive check on meal-time refusal or yelling, then give non-contingent attention every 10 minutes.
02At a glance
03Original abstract
Maladaptive behaviours are known to present as a feature of dementia amongst people from the general population, but there has been little research to examine whether this has implications for people with learning disabilities who develop dementia. Out of 143 people with learning disabilities aged 65 years and over living in Leicestershire, England, 134 (93.7%) participated in the study. Twenty-nine people diagnosed as having dementia were compared against 99 people without dementia; six people with possible dementia were excluded from the analysis. Comparisons were made on the results of a checklist of maladaptive behaviours. Seventeen out of the 22 maladaptive behaviours examined were found to be more prevalent amongst the people with dementia. The behaviours which were significantly more prevalent in the group with dementia included lack of energy, lack of sense of danger, sleep disturbance, agitation, incontinence, excessively uncooperative, mealtime/feeding problem, irritability and aggression. Dementia is becoming more prevalent amongst people with learning disabilities because of their increasing life span. Maladaptive behaviours are commonly associated with dementia. This can cause a significant burden for individuals and their carers, which may influence the viability of a person's residential placement.
Journal of intellectual disability research : JIDR, 1997 · doi:10.1111/j.1365-2788.1997.tb00740.x