AIP and diabetes mellitus: As demonstrated in Table 5, a higher AIP was significantly associated with a higher incidence of undiagnosed DM in ACS patients with an LDL-C level ≥ 1.8 mmol/L after adjustment in Model c; however, this trend became less significant in patients with an LDL-C level < 1.8 mmol/L after adjustment in Model c (patients with an LDL-C level < 1.8 mmol/L, ORc 1.523 (0.521–4.451), p = 0.442; T3 ORc 1.612 (0.807–3.219), p = 0.176; patients with an LDL-C level ≥ 1.8 mmol/L, ORc 2.028 (1.262–3.260), p = 0.004; T3 ORc 1.507 (1.156 0.964), p = 0.002].