Incidence of glioma in a northwestern region of England, 2006–2010

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Abstract

Background

Gliomas are important because they affect disproportionately high numbers of people of working age and have a poor prognosis. Neurosurgeons were concerned about a possible recent cluster of glioma cases in a northwestern region in England.

Methods

All patients aged 18–89 years in Lancashire and South Cumbria with a histologically confirmed glioma diagnosed at the Royal Preston Hospital between January 1, 2006, and December 31, 2010, were ascertained. Clinical information was extracted from hospital records. Completeness of case referral to Royal Preston Hospital was checked against the National Cancer Registry and National Brain Tumour Registry records for the same period. For a comprehensive assessment of regional incidence, age-standardized incidence rates of all gliomas diagnosed in adults (aged 15 years and older) in the study area were then compared with those for the North West region and England as a whole. Rates for the North West region in defined small area-units (“Middle Super Output Areas”) were also investigated to assess any small-area variation in the region during the decade to 2010.

Results

There were 435 glioma patients from Lancashire and South Cumbria diagnosed at the Royal Preston Hospital between 2006 and 2010, with case ascertainment verified to be complete by the National Cancer Registration Service. The age-standardized incidence rate of gliomas in the study area was 7.10 per 100 000 in 2006–2010, which was minimally different from the rate for all cancer networks in England over the 10 years from 2001. Small-area analysis confirmed lack of major variation in glioma rates in the North West region of England.

Conclusion

Glioma incidence rates in England have remained stable by region and over time during the last decade.

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