The results of this meta-analysis showed that during this short-term follow up period (<1 year), insulin-treated DM patients had significantly higher cardiovascular outcomes: All-cause mortality (OR 1.69, 95 % CI 1.40–2.04, p < 0.00001), MI (OR 1.40, 95 % CI 1.16–1.70, p = 0.0005), TLR (OR 1.37, 95 % CI 1.06–1.76, p = 0.02), TVR (OR 1.41, 95 % CI 1.13–1.76, p = 0.003), MACEs (OR 1.46, 95 % CI 1.22–1.76, p < 0.0001) and, Stent thrombosis (OR 1.66, 95 % CI 1.16–2.38, p = 0.005) compared to non-insulin treated DM patients after PCI. Here, INS is linked to diabetes mellitus.