Key result
Higher atherogenic index of plasma linked to ~47% higher in-hospital mortality in STEMI.
Why the study?
Is higher atherogenic index of plasma (AIP) associated with increased in-hospital mortality in STEMI patients across different admission LDL-C levels?
Cohort (n=918,620)
Yes
Is higher atherogenic index of plasma (AIP) associated with increased in-hospital mortality in STEMI patients across different admission LDL-C levels?
Relative Risk: 1.47 (95% CI 1.31–1.64)
Higher atherogenic index of plasma (AIP) is associated with increased in-hospital mortality in STEMI patients, capturing residual risk even among those with well-controlled LDL-C levels (<1.4 mmol/L).
Background: In-hospital mortality after ST-segment elevation myocardial infarction (STEMI) remains high, even in patients with normal admission LDL-C levels. The atherogenic index of plasma (AIP) better reflects atherogenic dyslipidemia than conventional lipid markers, but its association with in-hospital mortality in STEMI patients is unclear. Aim: To investigate the association between AIP and in-hospital mortality in patients with STEMI across different admission LDL-C levels. Methods: We analyzed data from 918,620 adults with STEMI (mean age: 62.4 ± 13 years; 76.6% male) in the Chinese Cardiovascular Association (CCA) Database-Chest Pain Centre Registry study from 2015 through 2024. The primary outcome was in-hospital mortality. We examined the association between AIP and in-hospital mortality using log binomial regression models in the total population and across different admission LDL-C levels. The non-linear association between AIP and in-hospital mortality was assessed by using restricted cubic spline models. Results: A total of 19,190 in-hospital deaths was recorded. Higher AIP was associated higher risk of in-hospital mortality across all LDL-C levels and showed the highest risk ratio (RR: 1.47 [95% CI, 1.31-1.64]; per standard deviation increase) among those with LDL-C levels < 1.4 mmol/L. Similarly, when analyzed as categorical variable, patients in the highest AIP quartile have the highest risk of in-hospital mortality. In the LDL-C < 1.4 mmol/L group, patients in the highest quartile had 124% higher risk of in-hospital mortality (RR: 2.24, 95% CI, 1.63-3.07) after adjustment. Conclusion: Higher AIP levels are associated with higher in-hospital mortality in STEMI patients, even among patients with target LDL-C levels. This suggest that AIP captures residual risk beyond LDL-C and may contribute to risk assessment in this population.
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liang et al. (2026) conducted a cohort in ST-segment elevation myocardial infarction (STEMI) (n=918,620). Atherogenic index of plasma (AIP) vs. Lower AIP levels was evaluated on In-hospital mortality (RR 1.47, 95% CI 1.31-1.64). Higher atherogenic index of plasma was associated with increased in-hospital mortality in STEMI patients, peaking at RR 1.47 per SD increase among those with LDL-C <1.4 mmol/L.
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