GSTM1 and aneurysm: There were also significant differences between lowest MAP and lowest Hb for ruptured and intact aneurysm after exclusion of the aneurysm sac (MAP 68 (52–70) vs. 75 (68–82) mm Hg, p = .002 and Hb 93 (81–107) vs. 102 (93–113) g/L, p = .068).