Modelling NORDCAN data of the age group specific incidence rates of gastric cancer with PLS-regression and with attention to age ('age effect') and year of the birth ('cohort effect').
PLS-regression
We examined in NORDCAN database how the annual age group-specific incidence rates (IR) of gastric cancer (GCA), and correspondingly the GCA risk, have declined in Finland during the twentieth century, and whether this decline corresponds to a decrease in the cohort-specific prevalence rate of Helicobacter pylori (Hp) gastritis that is considered an important precancerous risk condition for GCA.



NORDCAN database