Distribution Characteristics of 3,369 Chinese Colorectal Cancer Patients for Gender, Age, Location and Tumor Size During Colonoscopy

Background: Studies have shown the existence of gender- and age-related differences in the incidenceand anatomic distribution of colorectal cancers. The purposes of this study were to analyze the distributioncharacteristics of colorectal cancer patients regarding gender, age, location and tumor size in the course ofcolonoscopy. Materials and
Methods: All colorectal cancer patients who underwent colonoscopy in the FirstAffiliated Hospital of Guangxi Medical University from 2003 to 2012 were included in our retrospective study.Demographic information (age and gender) and colonoscopy report information (tumor size and location) werecollected and analyzed. To compare the gender differences in tumor location and tumor size, as well as the sizedifferences in tumor location, the chi-square test was used.
Results: A total of 3, 369 colorectal cancer patients(2, 007 men vs 1, 362 women) were included in our study. Statistical analysis showed there was no genderdifference in the anatomic distribution of the tumors (p>0.05). However, there was a gender difference in tumorsize (p<0.05). In addition, our study found there was a significant difference in tumor size between rectal andcolon tumors (p<0.001).
Conclusions: There was no gender difference in the anatomic distribution of colorectaltumors. In addition, tumors observed in men were larger than in women.