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Objective  The value of atherogenic index of plasma (AIP) as a predictive biomarker for coronary artery disease (CAD) remains controversial. In addition, whether AIP is associated with the risk of acute coronary syndrome (ACS) in very young adults has not been well established.    Methods  We consecutively collected very young adults (≤35 years of age) undergoing coronary angiography (CAG) at Anzhen Hospital, between January 2008 and December 2017. Total of 1, 478 very young participants, including 1, 059 ACS patients and 419 non-CAD subjects, were enrolled in the present study.    Results  Very young patients with ACS had higher AIP level compared with non-CAD participants (0.35 ± 0.30 vs 0.21 ± 0.33,  P  < 0.001). According to Gensini Score (GS) and number of lesion vessel, patients were divided into four groups, respectively. With the elevated GS score and number of lesion vessels, the AIP level increased gradually ( P  for trend  all< 0.05). Multivariate logistic regression analyses suggested that AIP remained to be independently associated with the presence of ACS and was superior to traditional lipid profiles (for AIP, OR = 2.930, 95% CI = 1.855–4.627,  P  < 0.001; for total cholesterol, OR = 1.152, 95% CI = 1.048–1.266,  P  = 0.003; for triglyceride, OR = 1.078, 95% CI = 0.991–1.172,  P  = 0.079; for low-density lipoprotein cholesterol, OR = 1.046, 95% CI = 1.015–1.078,  P  < 0.001), after adjustment for other traditional confounders. Moreover, the prevalence of ACS, acute myocardial infarction, unstable angina pectoris and the value of GS were also elevated as AIP quartiles increased ( P  for trend  < 0.001). Subgroup analysis based on gender revealed that AIP was only independently associated with the ACS risk in male.    Conclusions  AIP was independently associated with the presence and severity of ACS in very young patients in a gender-dependent manner, which might be superior to traditional lipid profiles.    Electronic supplementary material  The online version of this article (10.1186/s12944-019-1043-2) contains supplementary material, which is available to authorized users.

lipids in health and disease

Gender-specific associations between atherogenic index of plasma and the presence and severity of acute coronary syndrome in very young adults: a hospital-based observational study