Characteristics of morbidity and mortality of colorectal cancer in Shanghai, 2011-2015

ObjectiveTo describe the patterns of incidence and mortality of colorectal cancer in Shanghai during 2011-2015, and to provide reference for prevention and control strategies on colorectal cancer and comprehensive evaluation of screening program.

MethodsThe data on colorectal cancer cases were collected from the Shanghai Cancer Registry.The distributions of incidences and mortality during 2011-2015 were described.The patterns were analyzed according to gender, age, basis of diagnosis, histological type, diagnostic stage in detail.

ResultsA total of 8 508 new cases of colorectal cancer were diagnosed on average per year during 2011-2015, accounting for 12.85% of all cancers; the incidence was 59.54/10⁵, and the ASR 24.68/10⁵.The average annual deaths due to colorectal cancer were 4 612, accounting for 12.18% of all cancers.The mortality was 32.28/10⁵, and the ASR 11.22/10⁵.The proportion of colon cancer in new cases was higher than that of rectal cancer.The histologically verified rate was 85.95%, the percentage of early stage being 8.11% in newly diagnosed cases (unknown stage cases were included).

ConclusionThe incidence and mortality of colorectal cancer in Shanghai are higher than the level in China.The proportion of colon cancer is higher than that of rectum cancer.Gender, age and location differences, changes of incidence and staging influenced by screening program deserve more attention.