1. Adult Dental Health Survey 2009 Methodology
Ian O’ Sullivan

2. Adult Dental Health Survey 2009
The NHS Information Centre commissioned the survey, with funding provided by the Department of Health in England, the Welsh Assembly Government and the Department for Social Services and Public Safety in Northern Ireland.
The Office for National Statistics (ONS) was the lead contractor working in partnership with the National Centre for Social Research, the Northern Ireland Statistic & Research Agency, and a team of academics from the Universities of Birmingham, Cardiff, Dundee, Newcastle and University College London

3. Outline: Design interviewer-administered questionnaire
clinical dental examination
Sample
13,400 households
SHAs, Wales & Northern Ireland
Performance
Household response
Interview response
Clinical conversion rate
Weighting
Issues

4. Design: Two stage cluster sample
Interview based questionnaire
Clinical dental examination – home-based
All adults 16 and over eligible to participate in the survey
All dentate adults only were invited to participate in the clinical examination

5. Sample:
253 Primary Sampling Units (PSUs) in England and Wales & 15 PSUs in Northern Ireland
50 addresses per PSU
13,400 households sampled
1,150 in each SHA and Wales
750 in Northern Ireland
Sample stratified by country; SHA; proportion of respondents 65+; proportion of respondents in household NS-SEC 1-3; PCT

6. Field work was conducted in two ten-week field periods
October to December 2009
January to March 2010
ONS and NatCen shared field work in England and Wales, NISRA managed all data collection in Northern Ireland

7. Performance:

8. Weighting: Two weights on the dataset iweight & eweight
Weighted for differential sample size
Weighted for non-response (interview and examination)
Output Area Classification (OAC code) used non-response weighting
Possible to adjust for non-response based on area household is in
Weighted to population totals for age-by-sex group for each SHA, Wales and Northern Ireland

9. Issues:
Calibration
Inter-examiner variability
Variations between SHAs

10.
(01633)