Beyond inflammation and cholesterol: atherogenic index of plasma mediates the link between hsCRP/HDL-C ratio and depression in US adults NHANES 2015–2020
摘要
Dyslipidemia and inflammation play key roles in the pathophysiology of depression and are significantly associated with the plasma atherogenic index (AIP). However, a reliable biomarker for diagnosing depression remains elusive. The hsCRP/HDL-C ratio, combining C-reactive protein (hs-CRP) and high-density lipoprotein cholesterol (HDL-C), may serve as a potential composite indicator.
ObjectiveThis study aims to explore the relationship between the hsCRP/HDL-C ratio and depression.
MethodsNHANES data (2015–2020) from 10,357 participants were analyzed. Depression was assessed using the PHQ-9, and dyslipidemia with AIP. Participants were grouped based on their hsCRP/HDL-C ratio. Statistical methods included Student’s t-test, chi-square test, logistic regression, restricted cubic spline (RCS) model, and mediation analysis.
ResultsRCS regression analysis showed a nonlinear relationship between the hsCRP/HDL-C ratio and depression. The two-piece logistic regression model was used to calculate the threshold effect, and the likelihood ratio test (p < 0.05) indicated that the inflection point for hs-C/H was 11.608. When the hsCRP/HDL-C ratio was below this threshold, a positive correlation with depression was observed (OR: 1.04, 95% CI: 1.01–1.07). When the hsCRP/HDL-C ratio was equal to or greater than the threshold, a negative correlation was found (OR: 0.99, 95% CI: 0.97-1.00). Subgroup analysis showed consistent results, with marital status being the only factor that significantly influenced this relationship. Mediation analysis revealed that AIP partially mediated the relationship between hsCRP/HDL-C ratio and depression, explaining 11.2% of the total effect (95% CI: 2.26%-27.00%).
ConclusionsA higher hsCRP/HDL-C ratio is associated with increased depression risk. Interventions targeting CRP levels and lipid abnormalities may help reduce this risk.