[Incidence and mortality of stomach cancer in China, 2013]

Objective: To estimate the incidence and mortality of stomach cancer in China based on the cancer registration data in 2013, collected by the National Central Cancer Registry (NCCR). Methods: There were 347 cancer registries that submitted stomach cancer incidence and deaths occurred in 2013 to NCCR. After evaluating the data quality, 255 registries' data were accepted for analysis and stratified by areas (urban/rural), sex, and age group. Combined with data on national population in 2013, the nationwide incidence and mortality of stomach cancer were estimated. Chinese population census in 2000 and Segi's population were used for age-standardized incidence/mortality rates. Results: Qualified 255 cancer registries covered a total of 226 494 490 populations (111 595 772 in urban and 114 898 718 in rural areas). The percentage of cases morphologically verified and death certificate-only cases were 76.27% and 1.98%, respectively, and the mortality to incidence rate ratio was 0.72. It is estimated that there were 427 000 new cases for stomach cancer nationwide, with a crude incidence rate of 31.38 per 100 000 (42.85 per 100 000 in males, 19.33 per 100 000 in females). The age-standardized incidence rates by Chinese standard population (ASR China) and by world standard population (ASR world) were 21.40 per 100 000 and 21.32 per 100 000, respectively, with a cumulative incidence rate (0-74 age years old) of 2.66%. The crude and ASR China incidence rates of stomach cancer in urban areas were 27.80 per 100 000 and 18.48 per 100 000, respectively, whereas those were 35.54 per 100 000 and 24.93 per 100 000 in rural areas. It is estimated that there were 301 000 deaths for stomach cancer nationwide, with a crude mortality rate of 22.13 per 100 000 (29.85 per 100 000 in males, 14.03 per 100 000 in females). The ASR China and ASR world mortality rates were 14.68 per 100 000 and 14.54 per 100 000, respectively, with a cumulative mortality rate (0-74 years old) of 1.70%. The crude and ASR China mortality rates were 18.94 per 100 000 and 12.20 per 100 000 in urban areas, respectively, whereas those were 25.84 per 100 000 and 17.67 per 100 000 in rural areas. Conclusions: There is still a heavy burden of stomach cancer in China. The burden and patterns of stomach cancer shows different gender and urban-rural differences. Prevention and control strategies should be implemented referring to local status.