Predictors of identifying adenomas on the second withdrawal included older age ( odds ratio ( OR ) = 1.04 , 95 % confidence interval ( CI ) = 1.01-1 .08 ) , adenomas seen on initial withdrawal ( OR = 2.8 , 95 % CI = 1.7-4 .7 ) , and low endoscopist confidence in quality of first examination of the right colon ( OR = 4.8 , 95 % CI = 1.9-12 .1 ) .