Abstract
491 Background: Access to medical diagnostics and treatment might be limited for patients living in rural areas compared to urban residents. To evaluate the potential impact of urban/rural residence, we analyzed trends in RS for patients diagnosed with kidney cancer between 1998 and 2009 in Austria. Methods: All patients with kidney cancer aged ≥18 years, diagnosed from 1998-2009 were derived from the ANCR (n=14,576). Patients were categorized into two groups: rural (n=7,537) and urban (n=7,039) based on a complex algorithm considering infrastructure, commuter interrelations, accessibility of centers, and tourism at the time of diagnosis. Relative survival was calculated based on complete follow-up until December 31st, 2014. Poisson regression modeling was used to evaluate survival differences between the two groups and to calculate the relative excess risk of dying (RER). Analyses were performed for the total patient population and primary metastatic patients (M+). Results: Distribution of sex, age, stage of disease, year of diagnosis, and surgical treatment did not differ between rural and urban patients. Five-year RS was 74% for rural compared to 73% for urban patients (RER for rural: 0.88, 95% CI 0.81-0.95). In M+ patients, 5-year RS was 14% for both residence groups. On multivariate analysis, residence remained as an independent predictor for survival in the overall kidney cancer population (RER of rural patients 0.87, 95% CI 0.81-0.94). For M+ patients the RER was 0.90 ( 95% CI 0.81-1.00). For patients without surgery, rural patients were even stronger benefited in their survival than urban patients (overall population: RER 0.81, 95% CI 0.74-0.89; M+ patients: RER 0.84, 95% CI 0.73-0.97) wherereas in surgical patients RS did not differ between rural and urban patients. Conclusions: An advantage in RS was observed for kidney cancer patients living in rural areas. This advantage was evident in metastatic and non-metastatic patients, especially in patients who did not undergo surgery for (metastatic) kidney cancer. These results suggest that access to medical health care for kidney cancer patients in Austria is not limited by rural residence.
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