GSTM1 and ileus: However, there was no difference in differences in Hb level and the incidence of intra-or postoperative complications between the two groups (fever: CM, 29.4% vs CSO, 19.7%, p = 0.06; bladder injury: CM, 0.8% vs CSO, 1.2%, p = 1.00; ileus: CM, 5.0% vs CSO, 2.9%, p = 0.34).