The impact of staff initiated referral and intervention protocols on symptoms of depression in people with mild intellectual disability

It has been estimated that people with ID experience the same and possibly higher levels of depression than the general population. Referral to a General Medical Practitioner (GP) for primary care is recommended practice for people with depression and cognitive behavioural (CB) therapy is now an accepted evidence based intervention. A growing body of literature indicates that people with ID and depression may benefit from CB strategies. The aim of the current study was to compare (i) CB group intervention strategies with referral to a GP; (ii) CB group intervention strategies only; and (iii) referral to a GP only on symptoms of depression among people with mild ID. Staff from six participating agencies received training in (a) how to identify and screen individuals with mild ID for depressive symptoms and risk factors for depression, and (b) supportive referral of identified individuals to GPs for mental health services. In addition, staff from four of the agencies undertook (c) training on how to deliver group CB intervention strategies. Eighty-two participants were allocated to one of the three intervention groups. Depressive symptoms and negative automatic thoughts were assessed prior to the intervention, at the conclusion of the intervention, and at eight months follow-up. Compared to GP referral alone, those participants who received CB strategies both with and without GP referral displayed significant reductions in depressive symptoms. The use of CB strategies only also resulted in a significant reduction in frequency of negative automatic thoughts. The findings of this study support routine screening of individuals with mild ID for depression and the delivery of group CB intervention programmes by trained staff within community-based disability agencies.

► Cognitive behavioural strategies both with and without GP referral are effective.
► GP referral alone was the least effective strategy.
► Findings support the delivery of cognitive behavioural programmes by agency staff.
► Findings support routine screening for depression by agency staff.