Spatial analysis of risk factors related to colorectal cancer in Iran: An ecological study.

BACKGROUND AND AIMS: Colorectal cancer is the third most common cancer worldwide, accounting for 10% of cancer deaths. Therefore, this study was performed with the aim of spatial analysis of risk factors for colorectal cancer in Iran.

METHOD: This study was conducted ecologically using STEPS information (The WHO Stepwise Approach to NCD Risk Factor Surveillance) in Iran. To analyze the data, the researcher used cluster analysis and Geographically Weighted Regression methods with the help of ArcGIS version 10.

RESULTS

The results of OLS analysis showed that there was a significant relationship between tobacco consumption (B = 0.571, p-value = 0.044) and smoking (B = 0.772, p-value = 0.010) and the incidence of colon cancer (CC). There was also a significant relationship between abdominal obesity and the incidence of rectal cancer (RC) (B = 0.061, p-value = 0.027).

CONCLUSION

This study showed that (CC) high-risk areas are located in central and northern parts of Iran, and the significant risk factors related to CC and RC were found to be tobacco use, cigarette smoking, and abdominal obesity. These findings are helpful to inform policymakers to plan screening services to reduce CC and RC, especially in high-risk populations.