fig5

Figure 5. Risk of abnormal LDL-C among participants exposed to different combinations of PM_2.5 and O₃. Abnormal LDL-C is defined as LDL-C ≥ 4.1 mmol/L; the OR value represents the relative risk of participants being abnormal in LDL-C compared to the control group for each group. The model is as described in the methods section: logit(P) = $$ \ln \left(\frac{P}{1-P}\right) $$ = Group+ Age + Season + Year + T + RH + FBG + CK-MB + CK + ALT + AST + γ-GT + Cr + Urea. LDL-C: Low-density lipoprotein cholesterol; PM: particulate matter; O₃: ozone; T: temperature; RH: relative humidity; FBG: fasting blood glucose; CK-MB: creatine kinase-MB; CK: creatine kinase; ALT: alanine aminotransferase; AST: aspartate aminotransferase; γ-GT: γ-glutamyl transferase; Cr: creatinine; Urea: blood urea nitrogen.