Assessment & Research

The Intellectual Disability Mortality Disadvantage: Diminishing With Age?

Landes (2017) · American journal on intellectual and developmental disabilities 2017
★ The Verdict

The mortality gap between adults with and without ID narrows with age, especially for women, but medical risk factors still demand active care management.

✓ Read this if BCBAs writing transition or adult plans for clients 40-plus with ID.
✗ Skip if Clinicians focused only on early-intervention cases under 21.

01Research in Context

01

What this study did

Landes (2017) looked at death records for thousands of adults with and without intellectual disability (ID).

The team tracked how big the mortality gap was at each age group, from 25 up to 85-plus.

02

What they found

Adults with ID still die sooner, but the gap shrinks as both groups get older.

The narrowing is strongest in women: by the oldest ages, the extra risk is almost gone.

03

How this fits with other research

Eggleston et al. (2018) extends the story. They show that once adults with ID hit 50, having four or more chronic illnesses or taking five-plus meds doubles the chance of dying within five years. The age-gap shrink does not mean medical risk disappears; it just means the general population is also getting sicker.

Lin et al. (2011) is the predecessor warning. Managers already knew people with ID age earlier, but services were not ready. Landes (2017) now gives numbers that justify those early alarms.

Pitchford et al. (2019) seems to clash: they find higher hospital readmissions in older adults with ID for some body systems. If the mortality gap is closing, why more re-hospitalizations? The answer is method: Landes (2017) counts death, while A et al. count return visits. More trips to the hospital can happen even if ultimate survival evens out.

04

Why it matters

You can stop assuming every older client with ID is automatically at extreme end-of-life risk. Use the extra years to plan: teach health self-advocacy, schedule chronic-condition reviews, and push for lower pill counts when possible. The window for quality-of-life gains is wider than we once thought.

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Pull your 50-plus clients' med lists; flag anyone on five or more drugs for a pharmacist or physician review this month.

02At a glance

Intervention
not applicable
Design
other
Population
intellectual disability
Finding
not reported

03Original abstract

On average, adults with intellectual disability (ID) have higher mortality risk than their peers in the general population. However, the effect of age on this mortality disadvantage has received minimal attention. Using data from the 1986-2011 National Health Interview Survey-Linked Mortality Files (NHIS-LMF), discrete time hazard models were used to compare mortality risk for adults with and without ID by age and gender. Increased mortality risk was present for all adults with ID, but was most pronounced among younger age females. The mortality differential between those with and without ID diminished with increased age for both females and males. Findings support the argument that heterogeneity of frailty may explain differences in mortality risk between those with and without ID.

American journal on intellectual and developmental disabilities, 2017 · doi:10.1352/1944-7558-122.2.192