assessment of autism in a survey of adults adult psychiatric morbidity survey 2007
TRANSCRIPT
Assessment of autism in a survey of adultsAdult Psychiatric Morbidity Survey 2007
Policy focus
More common among...• boys (4:1)• people with a learning disability
• 1% of children
What is already known?
Autism spectrum conditions
Characterised by difficulty with...• Social communication • Social interaction • Social imagination
4) A disorder that, although its presentation may change and moderate with age, has a childhood onset and is life-long
• Clinical setting• Developmental history• Involvement of parent
• Self-report screening tool?
Assessment of autism
Adult Household 1993
Institutional Residents 1994
Adult Household 2007
1993 2000 2007
Adult Household 2000
Homeless Persons 1994
Prisoners 1997
Adult Household Follow-up
2002
Children and Adolescent Follow-up
2002
Children and Adolescents 1998
Children and Adolescents 2004
Carers 2001
Looked After Children 2001
The Psychiatric Morbidity Survey Series
APMS 2007: ASD assessment phases
7,400 phase one interviewsAutism Quotient 20 (AQ20)
630 phase two clinical assessmentsAutism Diagnostic Observation Schedule (ADOS)
60 validation assessments with parents/carersDiagnostic Interview for Social and Communication
Disorders (DISCO)
Phase one AQ20 distribution (7,400 adults)
Probability of selection to phase two, by phase one AQ20 score
0
0.2
0.4
0.6
0.8
1
0 2 4 6 8 10 12 14 16 18 20
AQ score at phase one
Probability of selection to phase two
Phase two ADOS assessments (618)
• 618 ADOS assessments• 19 cases of ASD diagnosed• 5 had an AQ20 score of less than 10• Weighting corrects for sampling and non-response• Estimate 72 cases in phase one sample• 1% prevalence in adults• No association with age
Prevalence of ASD by sex
ASD by highest educational qualification
In conclusion...
• Poor screening tool• Few ASD cases diagnosed • Inclusion of people who scored low at phase one • Rates of ASD not increasing• Disadvantaged group
• Communal establishments
Acknowledgements
• NatCen• Susan Purdon, Katharine Sadler, Jenny Harris, Dhriti Jotangia
• University of Leicester• Terry Brugha, Howard Meltzer, Jane Smith
• ARU, Cambridge University • Fiona Scott
• NHS Information Centre for health and social care• Netta Hollings, Vicky Cooper, Andy Sutherland
• DH policy research Unit• Zoltan Bozoky
Thank you
www.natcen.ac.uk