investigating the incidence of gastric cancer and its relationship with geographical factors in lorestan province during 2013 – 2016

Introduction: gastric cancer is the fourth most common cancer in iran. this study aimed to determine the incidence of gastric cancer and its relationship with geographical factors in lorestan province between 2013-2016.materials & methods: all data related to gastric cancer was collected from the comprehensive cancer registration system and national population census data in lorestan province. to investigate the general characteristics, descriptive tables and graphs were used. pearson correlation and linear regression model were used to evaluate the relationship between the incidence of stomach cancer and geographical factors and arc gis.ver10.8 software was used to compare the incidence rate of cancer. p-value <0.05 was considered as significant in the spss v.18.results:  totally 907 patients with gastric cancer were registered during 2013-2016, of which 68.7% were men, 82.4% were from urban areas, and 17.6% from the rural areas. mean (standard deviation) of the age of patients was 66 (15) years. the cumulative incidence rate of gastric cancer in lorestan province was 51.5 per 100,000 populations. the annual incidence rate varied between 9.1 and 18 per 100,000 populations. the relationship between incidence of gastric cancer and geographical factors was insignificant (p>0.05).conclusion:  the cumulative incidence rate of gastric cancer in lorestan province was 51.5 per 100,000 that relatively is high in iran. there was no significant relationship between the incidence of gastric cancer and geographical factors.