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A population-based study of glioblastoma multiforme
L Paszat1, N Laperriere, P Groome
1Radiation Oncology Research Unit, Department of Oncology, Queen's University, Kingston, Canada. lawrence.paszat@tsrcc.on.ca
International Journal of Radiation Oncology, Biology, Physics
|August 23, 2001
Summary
Treatment for glioblastoma (GBM) in Ontario showed regional variations, but survival rates did not improve over time. Radiotherapy (RT) use and dosage varied significantly by patient age and location.
Area of Science:
- Neuro-oncology
- Cancer epidemiology
- Health services research
Background:
- Glioblastoma (GBM) is an aggressive brain tumor with poor prognosis.
- Treatment strategies for GBM often involve surgery and radiotherapy (RT).
- Understanding variations in treatment and outcomes is crucial for improving patient care.
Purpose of the Study:
- To describe the utilization of surgery and radiotherapy (RT) for glioblastoma (GBM) patients in Ontario.
- To analyze survival rates among GBM patients.
- To determine the proportion of survival time spent hospitalized post-diagnosis.
Main Methods:
- Population-based cohort study of GBM cases in Ontario (1982-1994).
- Linked Ontario Cancer Registry (OCR), hospital, and RT records.
- Multivariate logistic regression for treatment odds; life-table and Cox regression for survival analysis.
Main Results:
- Treatment patterns (surgery, RT use, RT dose) varied significantly by patient age, region of residence, and year of diagnosis.
- Median survival was 11 months with RT versus 3 months without RT.
- Hospitalization proportion was similar across different RT dose ranges.
Conclusions:
- Observed practice variations in GBM treatment based on patient demographics and geography.
- No improvement in survival was noted during the study period.
- RT dose variations did not correlate with survival or hospitalization time differences across regions.