Assessment & Research

Suicidal behavior in children and adolescents with developmental disorders.

Hardan et al. (1999) · Research in developmental disabilities 1999
★ The Verdict

One in five referred kids with developmental disabilities showed suicidal signs—screen harder when mood or trauma is on the chart.

✓ Read this if BCBAs doing intake or risk assessment with autistic or ID clients in clinic or school settings.
✗ Skip if Practitioners who only serve typically developing clients with no comorbid diagnoses.

01Research in Context

01

What this study did

Doctors looked back at charts of kids sent to a developmental clinic. They counted how many had notes about suicidal thoughts, threats, or tries. All children had autism, intellectual disability, or other delays.

The team wanted a quick picture of how often suicide signs show up in this group. No new tests or treatments were given.

02

What they found

One in five files mentioned suicidal ideas or acts. The number jumped higher when kids also had mood problems or trauma history. Kids with more than one diagnosis were the most likely to show these signs.

03

How this fits with other research

Anthony et al. (2020) later showed no autism-specific suicide screen exists; the 1999 count is still one of the few hard numbers we have.

Payne et al. (2020) pooled many studies and found wide ranges, but the 20% rate sits near the middle, so the old number still rings true.

Arwert et al. (2020) went deeper and found suicide talk and self-harm have different risk profiles. Their work adds detail, not doubt, to the 1999 warning.

04

Why it matters

You now have a fast rule: expect one suicidal sign for every five developmentally disabled clients you see. When intake shows mood or trauma history, raise that risk in your notes and share it with the team. Build this check into your intake form so nothing is missed.

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Add a single yes/no line to your intake form: 'Any mention of suicidal talk, threats, or acts?' and flag for supervisor follow-up if yes.

02At a glance

Intervention
not applicable
Design
case series
Sample size
47
Population
autism spectrum disorder, intellectual disability, developmental delay, mixed clinical
Finding
not reported

03Original abstract

Children and adolescents with developmental disorders exhibit a wide range of self-destructive behaviors. Interestingly, suicidal ideation and gestures have been underreported in this population. This study was designed to examine suicidality in a clinically referred sample. The medical records of all individuals assessed in a specialized program during a 1-year period were reviewed looking at the incidence, the type and the clinical characteristics of any suicidal behavior. Forty-seven patients (20%) experienced either suicidal ideation, threats, or attempts with hanging being the most frequent method considered. Suicidality was more often encountered in individuals diagnosed with oppositional defiant disorder, depressive disorders, and post traumatic stress disorder, and less often in the autistic and the severely/profoundly mentally retarded groups. Suicidal behaviors were frequently encountered in children and adolescents with developmental disabilities. Prospective studies should be conducted to examine rigorously the variables associated with suicidality in this population.

Research in developmental disabilities, 1999 · doi:10.1016/s0891-4222(99)00010-4