Situation with cancer care in Russia. Kidney cancer (median survival, cumulative survival, and survival of patients depending on their disease stage). Population-based study at the federal district level. Part 2

Background. In the first part of our study, we described the dynamics of kidney cancer (С64) incidence and mortality, as well as reliability of kidney cancer surveillance in Russia. This study analyzed the effectiveness of cancer control measures in Russia by assessing patient survival using the data form the newly developed Population-based cancer registry of the North-Western Federal District. Materials and methods. We used the data from the Population-based cancer registry of the North-Western Federal District of Russia that has more than 1,350,000 records, including 35,629 kidney cancer patients. Standard methods of the European Network of Cancer Registries (EUROCARE program) were used for data processing and analysis. Results. Our findings confirmed that kidney cancer is characterized by a low death rate. Over the last 18 years, median survival of kidney cancer patients in the North-Western Federal District of Russia increased form 4 years to 6.5 years. The 1-year survival rate increased from 68 % to 78.5 % (by 16.5 %); 5-year cumulative observed survival increased from 47.3 % to 54.1 %; 5-year cumulative relative survival increased from 56.8 % to 61.8 %. Female kidney cancer patients demonstrated higher 5-year cumulative survival rates than male patients (65.8 % vs 43.9 %). Conclusion. We observed a positive dynamic of the main analytical indicators of cancer control, including an increase in the median survival and 5-year cumulative survival of kidney cancer patients.