the clinical benefit of preventing cardiovascular events
by using statins in hypercholesterolemic patients is well
established.1,2 The benefit in hypercholesterolemic patients
with diabetes mellitus (DM) has also been demonstrated
in several randomized trials,3–5 but recent data showed that
statins are associated with an increased risk of new-onset DM6,7
and that the risk is dose dependent.8 Some reports suggested the
suppressive effect of statin on cardiovascular events outweighs
the risk of DM onset.9–11 The guidelines show the rationale for
statin therapy to prevent cardiovascular events based on risk
stratification for each patient, which includes DM.12,13 However,
few prospective, randomized, controlled studies have been conducted
to investigate the effect of statin therapy on glucose levels