The predictors for re-bleeding after CE were analyzed using univariate analysis; wherein, the Cox proportional hazard model revealed that: a history of previous overt GI bleeding prior to CE study, hemoglobin (Hb) level < 7.0 g/dL at initial bleeding, liver cirrhosis as well as incomplete small bowel visualization of CE study were associated with re-bleeding episodes. This evidence concerns the gene GSTM1 and cholesteryl ester measurement.