Incidence Trends of Urinary Bladder and Kidney Cancers in Urban Shanghai, 1973-2005 |
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| Authors: | Yang Yang Li Xie Jia-Li Zheng Yu-Ting Tan Wei Zhang Yong-Bing Xiang |
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| Institution: | 1. Department of Epidemiology, Shanghai Cancer Institute, Renji Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.; 2. State Key Laboratory of Oncogene and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.; 3. Biostatistics Department, College of Public Health, University of Nebraska Medical Center, Omaha, Nebraska, United States of America.; University of Campinas, Brazil, |
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| Abstract: | ObjectivesWe examined the incidence trends of bladder and kidney cancers using a population-based cancer registration data.MethodsAge-standardized incidence rates were analyzed using data from the Shanghai Cancer Registry during 1973 to 2005. Annual percentage changes and 95% confidence intervals were calculated to evaluate the incidence changes. Age-period-cohort analysis was further implemented to assess the contributions of age, period and cohort effects to the trends using the intrinsic estimator method.ResultsIn total, 12,676 bladder and 5,811 kidney cancer patients were registered in urban Shanghai. The age-standardized rates of bladder cancer in males increased from 6.39 to 7.66 per 100,000, or 0.62% per year, whereas the rates in females increased from 1.95 to 2.09 per 100,000, or 0.33% per year. For kidney cancer, the age-standardized rates in males increased from 1.20 to 5.64 per 100,000, or 6.98% per year. Similarly in females, the rates increased from 0.85 to 3.33 per 100,000, or 5.93% per year. Age-period-cohort analysis showed increasing curves of age and period effects but generally decreasing cohort effects for bladder and kidney cancers. ConclusionsOur results show increasing incidence trends of bladder and kidney cancers in Chinese men and women, especially for kidney cancer. |
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