ACE and triple-A syndrome: ACE inhibitors (model 1 −0.243 mm/year, P = 0.00040; and model 2 −0.252 mm/year, P < 0.00004) and metformin (model 1 −0.38 mm/year, P = 0.00019; and model 2 −0.444 mm/year, P < 0.00001) exhibited a highly significant independent association with slower AAA growth, after Bonferroni correction.