CRP and diabetes mellitus: Subgroup analyses were performed based on study arms and showed a significant CRP-lowering effect in placebo-controlled studies (SMD: −0.25; 95% CI: −0.47, −0.03, p = 0.02) but not in diabetes medication-controlled studies (SMD: 0.24; 95% CI: −0.20, 0.68, p = 0.29).