LCN2 and type 2 diabetes mellitus: Results from the multinomial logistic regression analysis between the T2DM group and the DN or CAP group indicated that serum LCN-2 was found to be independently associated with DN or CAP [OR 2.873 (95%CI 1.798-4.590), P < 0.001], together with age and the T2DM duration after the adjustment for basic factors (Model 1).