Using the SPSS software, the prevalence of colon polyps and colon cancer between the group age >80 years and < 80 years will be compared. Significant polyps will be defined as polyp > 1 cm in size, polyps with villous histology, three or more polyps and polyps with dysplasia. Hyperplastic polyps will be considered non-neoplastic. Smokers will be defined as people who smoked at least 1 pack per day for 10 years and who did not quit smoking in the past 10 years. Associations between the clinical and demographic variables will be examined using Spearman's correlation coefficients. Univariate analysis will be performed Chi-square or fisher's exact test for categorical variables and Wilcoxon sum test for continuous variables. A multivariate logistic regression will be performed to control for the covariates that may affect the prevalence of colonic neoplasia. All tests will be two-tailed. A p value of < 0.05 will be considered significant.