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Reasons for variation in coverage in the NHS cervical screening programme.
C E McGahan1, R G Blanks, S M Moss
1Cancer Screening Evaluation Unit, Institute of Cancer Research, Section of Epidemiology, Sutton, UK.
Summary
Cervical screening coverage variations are mainly due to age and area. Adjusting the age range for performance indicators improves target achievement rates for cervical cancer prevention.
Area of Science:
- Public Health
- Health Services Research
Background:
- Cervical screening coverage varies significantly across health authorities.
- Accurate performance indicators are crucial for effective public health strategies.
Purpose of the Study:
- To investigate factors contributing to variations in cervical screening coverage.
- To evaluate the accuracy of current coverage performance indicators.
Main Methods:
- Analysis of Department of Health returns data for all Health Authorities (1998/1999).
- Statistical examination of age distribution and area classification as explanatory variables.
- Comparison of Health Authority and Office of National Statistics population figures.
Main Results:
- Age distribution and area classification explain approximately 80% of coverage variation.
- Discrepancies in population data suggest list inflation in specific London age groups.
- Using the 35-64 age range for coverage increased target achievement from 87% to 90%.
Conclusions:
- Age and area are primary drivers of cervical screening coverage variation.
- The 35-64 age range provides a more accurate measure of cervical screening performance.
- Refining performance indicators can better reflect public health efforts in cervical cancer prevention.