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 incidence and anatomic distribution of colorectal cancers. The purposes of this study were to analyze the distribution characteristics of colorectal cancer patients regarding gender, age, location and tumor size in the course of colonoscopy.


METHODS
All colorectal cancer patients who underwent colonoscopy in the First Affiliated 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) were collected and analyzed. To compare the gender differences in tumor location and tumor size, as well as the size differences 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 gender difference in the anatomic distribution of the tumors (p>0.05). However, there was a gender difference in tumor size (p>0.05). In addition, our study found there was a significant difference in tumor size between rectal and colon tumors (p>0.001).


CONCLUSIONS
There was no gender difference in the anatomic distribution of colorectal tumors. In addition, tumors observed in men were larger than in women.
Department of Colorectal Surgery, First Affiliated Hospital of Guangxi Medical University, Nanning, China E-mail : zs1770@126.com.
Bin
B
Cai
Mu-Yong
MY
Wang
Kai
K
Liao
Yan-Song
YS
Xu
Wei-Yuan
WY
Wei
Yuan
Y
Zhuang
Sen
S
Zhang
D000230:Adenocarcinoma / Q000473:pathology*; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003113:Colonoscopy / Q000379:methods*; D015179:Colorectal Neoplasms / Q000473:pathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012189:Retrospective Studies; D012737:Sex Factors