Assessment & Research

Obesity and associated factors in adults with intellectual disability.

Hsieh et al. (2014) · Journal of intellectual disability research : JIDR 2014
★ The Verdict

Adults with ID—especially women and those with Down syndrome—carry markedly higher obesity risk; screen BMI and target modifiable factors (physical activity, soda intake).

✓ Read this if BCBAs serving adults with ID in residential, day-hab, or clinic settings
✗ Skip if Practitioners working solely with typically developing weight-loss clients

01Research in Context

01

What this study did

Hsieh et al. (2014) looked at how common obesity is among adults with intellectual disability. They used a survey design to collect height, weight, and lifestyle data from a large U.S. sample.

The team also asked about sex, Down syndrome status, medicines, exercise, and soda use. They compared the numbers to general population rates.

02

What they found

More than one in three adults with ID were obese. The rate was even higher for women and for people with Down syndrome.

Low exercise and daily soda each added extra risk. Medicines that cause weight gain also showed a clear link.

03

How this fits with other research

Sasson et al. (2022) pooled 17 exercise trials and found workouts alone did not shrink BMI in people with ID. This agrees with K et al.: if soda and drugs still sit on the table, activity by itself is not enough.

Bertapelli et al. (2016) saw the same pattern in kids with Down syndrome. Exercise-only plans failed there too, so the “move more” message needs food and behavior supports across the lifespan.

McQuaid et al. (2024) seems to clash: they report that obese adults with Down syndrome did not show worse blood sugar or cholesterol. The gap is likely about outcome choice: K et al. counts body weight as the danger signal, while A et al. looks inside the blood and finds less damage than expected. Both can be true—extra pounds show up, but metabolic harm may arrive later or differ in this group.

04

Why it matters

Start every intake by plotting BMI, especially for women and clients with Down syndrome. Pair the number with quick questions on soda, meds, and daily movement. When you write the behavior plan, fold in diet goals and pill reviews with exercise—single-prong programs waste hours. Track weight quarterly and loop in medical staff early; even if labs look fine today, extra weight still limits mobility and community access.

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Add two questions to your intake: 'How many sugary drinks per day?' and 'Which medicines are you on?'—then schedule a BMI check before the next session.

02At a glance

Intervention
not applicable
Design
quasi experimental
Sample size
1450
Population
intellectual disability
Finding
not reported

03Original abstract

BACKGROUND: We examined the prevalence of obesity in adults with intellectual disabilities (ID) compared with the general population, and the factors associated with obesity and weight management status, comparing individuals with ID who were overweight or obese to those who were not. METHODS: We analysed baseline data (n = 1450) from the ongoing 4-year Longitudinal Health and Intellectual Disabilities Study (LHIDS) using a multivariate approach. Measures included body mass index (BMI), demographics, level of ID, diagnoses related to ID, health behaviours (i.e. physical activity, dietary habits, smoking, and alcohol consumption), various health parameters (e.g. mobility limitation, medications), and residential type and location. RESULTS: Compared with the general population, adults (≥ 18 years) with ID had a higher prevalence of obesity (38.3% vs. 28%) and morbid obesity (7.4% vs. 4.2%). Being female (AOR = 1.40, 95% CI = 1.09-1.81), having Down syndrome (AOR = 2.53, 95% CI = 1.86-3.45), taking medications that cause weight gain (AOR = 1.80, 95% CI = 1.38-2.37), engaging in less moderate physical activity (AOR = 0.89, 95% CI = 0.79-0.99), and drinking greater amounts of soda (AOR = 1.20, 95% CI = 1.02-1.42) were associated with higher rates of obesity. CONCLUSION: Adults with ID, in general, have a high risk of developing obesity, and women with ID have a high risk of developing morbid obesity. Health promotion initiatives should target individuals with the greatest risk.

Journal of intellectual disability research : JIDR, 2014 · doi:10.1111/jir.12100