There are several limitations to this study. Firstly, we compared
laboratory data mainly as the outcome; in addition, the
long-term outcome is uncertain. Moreover, the differences in
glucose levels between the 2 statins were determined by the
changes in HbA1c levels, in addition to the treatment intensity
for DM. Secondly, our study used small dosages based on the
Japanese regulation, so the results might underestimate the
effects of statins. Besides, this was an open-label study in which
the possibility of bias cannot be entirely denied. However, both
groups were treated aggressively for DM, as the results for
HbA1c level at 12 months were similar between groups, although
they were different at 6 months. We believe our findings
would be close to the real clinical setting