['To investigate serum beta2-glycoprotein I-low-density lipoprotein (β2-GPI-LDL) and oxidized low-density lipoprotein (ox-LDL) levels in type 2 diabetes mellitus (T2DM) patients, and to further evaluate the associations of β2-GPI-LDL with ox-LDL in vivo and with the presence of diabetic microvascular complications.', 'We determined β2-GPI-LDL, ox-LDL and small dense low density lipoprotein cholesterol (sdLDL-C) levels in 236 T2DM patients with or without microvascular complications and 75 controls. The correlation analyses, multiple linear regression analyses and logistic regression analyses were performed, respectively.', 'Compared with controls, β2-GPI-LDL and ox-LDL levels were significantly elevated in both groups of T2DM patients and those with microvascular complications exhibited the more significant increase than those without complications. Serum β2-GPI-LDL levels were positively correlated with ox-LDL as well as sdLDL-C levels in T2DM patients. Multiple linear regression analyses showed that ox-LDL was one of the independent determinants of β2-GPI-LDL levels. Logistic regression analyses indicated that elevated β2-GPI-LDL and ox-LDL levels had significant predictive values for diabetic microvascular complications.'] Are elevated beta2-glycoprotein I-low-density lipoprotein levels associated with the presence of diabetic microvascular complications?