Abstract
Background
Cancer was the second leading cause of death in Turkey. The aim of this study is to examine the changes in the incidence of cancer cases and survival analysis in a region.
Methods
This retrospective cohort study was carried out on data of 977 people had been diagnosed with cancer between the years 2013-2015 in Bingol province located in the east of Turkey. All cancer cases are included in the study. The data of the patients were obtained from the Ministry of Health Cancer Registry System and International Disease Classification Oncology (ICD-O) codes published by World Health Organization were used. Patients were evaluated topographically (tissue originating from the lesion) in 41 categories. Kruskal Wallis, Mann Whitney U test, Chi-square test and Cox regression analysis were used to analyze the data.
Results
The mean age of the patients was 58.73 ± 16.80 (min: 1-max: 107). It was observed that 28.7% of the patients died during the follow-up period and 71.3% of the patients were alive. 30% of the cancer cases digestive system, 11% respiratory system, 23% female breast- genitalia, 15% blood-lymph-thyroid, 11.8% muscle-bone, 15,4% other cancer species. In men, lung, stomach, colon, prostate; breast, thyroid and skin cancers are more common in women respectively. The incidence rate for all age groups was 97 per hundred thousand in 2013, 161 per hundred thousand in 2015. The increase trend did not differ by gender. The mean follow-up period of the patients who died was 388 days and 1541 days for the living patients. The risk of death is increased significantly in patients who cannot be operated (RR = 2.779, HR = 3.048). In patients not receiving chemotherapy, the risk of death is reduced significantly (RR = 0.656, HR = 0.340).
Conclusions
The incidence of cancer increases in the study area. Survival times vary according to treatment efficacy. Broad-based cohort studies evaluating the effects of treatment types on survival may be recommended.
Key messages
Cancer in the study area shows a significant increase from year to year. The average 5-year survival period of cancer patients was found is 71% as a good result.