Analysis on mortality of digestive system cancer from 1988 to 2005 in Kaifeng county,China

Objective To investigate characteristic distribution and time trend of cancer mortality in Kaifeng county.Methods The cancer mortality was analyzed using the data from registry on malignant tumors deaths in Kaifeng county during 1988 to 2005.Age-standarized mortality rate adjusted by standard population with direct methods,and annual percentage change(APC) of mortality were estimated by a linear r…