CST3 and diabetes mellitus: In contrast, diabetes status and logarithmized cystatin C levels associated significantly but negatively with AAA, with OR 0.437 (95% C.I.: 0.215–0.891, P = 0.023) and 0.356 (95% C.I.: 0.212–0.595, P<0.001) for diabetes and logarithmized plasma cystatin C levels, respectively (Table 2).