Analysis of the incidence of gallbladder cancer in Qidong, Jiangsu Province from 1993 to 2012

ObjectiveTo analyze the incidence of gallbladder cancer in Qidong City from 1993 to 2012.

MethodsThe clinical data of gallbladder cancer from January 1993 to December 2012 for patients with census registration in Qidong were sorted out from the cancer registration center in Qidong. Annual percent change(APC) models were applied to describe the annual percent changes of disease incidence and the standardized incidence trend over time. The incidence was standardized with the age structure of standard population from a national census taken in 2000.

ResultsA total of 493 new cases were diagnosed from 1993 to 2012, occupying 0.81% of new-onset malignant tumors for the same period. The crude incidence rate of gallbladder cancer was 2.41/100 000 population and the standardized incidence thereof was 1.42/100 000 population. Both the crude incidence and the standardized incidence thereof increased on a yearly basis from 1993 to 2012(APC=12.83; APC=12.04) while the annual crude incidence thereof for females increased faster than that for males(APC=14.51; APC=10.60). Old people aged 65 years and above were a high-risk group for gallbladder cancer, occupying 63.49% of the incidence thereof for all ages.

ConclusionThe incidence of gallbladder cancer increases in Qidong, Jiangsu province of China on a yearly basis from 1993 to 2012, with the incidence thereof for females increasing faster than that for males.