Assessment & Research

Psychiatric co-morbidity and gender differences in intellectual disability.

Tsakanikos et al. (2006) · Journal of intellectual disability research : JIDR 2006
★ The Verdict

Men with ID show more personality disorders; women show more dementia and adjustment reactions—tailor your intake questions and referral path accordingly.

✓ Read this if BCBAs completing intake assessments for adults with ID in community or forensic settings.
✗ Skip if Practitioners working solely with children or with clients who have no ID diagnosis.

01Research in Context

01

What this study did

Lancioni et al. (2006) looked at 590 adults with intellectual disability. They counted who had which psychiatric diagnosis and noted if the person was a man or woman.

Records came from community clinics in one English region. The team wanted to see if mental-health patterns differ by gender in the ID population.

02

What they found

Men were twice as likely to carry a personality-disorder label. Women showed higher rates of dementia and adjustment reactions.

Referral sources also split by gender. Men arrived more often via the criminal-justice system; women came through health or social-care routes.

03

How this fits with other research

Oliver et al. (2002) and English et al. (1995) tested the Reiss Screen, a checklist for mental-health problems in adults with ID. Both papers warn that inter-rater agreement is only modest. E et al. echo the caution: without a standard tool, gender differences could reflect clinician bias rather than true prevalence.

Heald et al. (2020) shift the lens to end-of-life care. Their register study shows older cancer patients with ID receive fewer specialist visits and mostly die at home. The gender split seen in E et al. helps explain why men might be under-referred for medical follow-up: they enter services through justice, not health, channels.

Lifshitz et al. (2016) add a cognitive twist. Their review finds visuospatial working memory is more intact than phonological loop skills in ID. If women present with adjustment reactions, assess memory load first; apparent anxiety might be task overload in verbal domains.

04

Why it matters

Screen men with ID for antisocial or impulsive traits early; channel them into positive behaviour support instead of justice loops. Screen women for mood or cognitive decline; ask about life changes and hearing status before labeling adjustment reaction. Always use a validated tool like the Reiss Screen and have two clinicians score independently to curb gender bias.

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Add a gender-sensitive mental-health checklist to your intake packet and double-score it with a colleague.

02At a glance

Intervention
not applicable
Design
other
Sample size
590
Population
intellectual disability
Finding
not reported

03Original abstract

BACKGROUND: Although gender differences in psychopathology among the general psychiatric population appear to be well documented, such differences have been either ignored or inconsistently investigated among people with intellectual disability (ID). METHODS: The study examined psychiatric co- morbidity in 295 men and 295 women with ID and significant social impairments living in community settings. The sample was drawn from consecutive clinical referrals to a specialist mental heath service of South-East London. Psychiatric diagnoses were based on ICD-10 criteria. RESULTS: Personality disorder was more common among men, although dementia and adjustment reaction were more common among women. There were also gender differences in marital status, with a larger percentage of women being either married or in a stable relationship. Gender differences in the source of referral were also observed, with more women being referred through primary care and more men being referred through generic mental health services. CONCLUSIONS: Female patients seem to have at some extent different mental health needs from male patients. Such differences should be taken into account in the design and delivery of clinical service for people with ID.

Journal of intellectual disability research : JIDR, 2006 · doi:10.1111/j.1365-2788.2006.00832.x