Referral trends of people with intellectual disabilities and psychiatric disorders.

Constantino et al. (2003) counted every referral to one London mental-health service for people with intellectual disability. They looked at 18 years of charts to see who got sent, why, and how the pattern changed.

The team noted age, level of ID, where the referral came from, and any extra psychiatric label.

Referrals kept climbing. Over time, more people arrived with mild ID, not severe. More came from GPs, not hospitals. More were from non-white families. And more carried a second diagnosis like depression or psychosis.

Martin et al. (1997) drew the earlier map: most UK regions had almost no specialist health slots for people with ID. The rise N saw fits that blank space finally getting filled.

Lancioni et al. (2006) zoomed in on the same clinic stream and found men sent for personality disorders, women for dementia. N’s count shows the front door; E shows where people walked after they entered.

Laugeson et al. (2014) widened the lens: only 2% of big medical trials include anyone with ID. N’s climb in referrals hints that doctors are ready to help, yet drug and therapy studies still leave this group out.

If you write behaviour plans, expect more clients with mild ID and mood or psychosis labels. They may need shorter teaching sessions, visual coping tools, and close liaison with psychiatry. Track referral source: GP-sent families often know little about behaviour services, so build plain-language welcome packs and invite the GP to the first meeting.