Fig. 2

Receiver operating characteristic (ROC) curves of traditional risk factors, acylcarnitine factors, and traditional risk factors plus acylcarnitine factors for diabetic retinopathy in type 2 diabetes patients

The blue curve stands for the traditional risk factor model; the red curve stands for acylcarnitine factors model; the green curve stands for the traditional risk factors plus the acylcarnitine factors model. The area under the operating characteristic curve was 0.6824 (95% CI 0.6409 to 0.7239) for the traditional risk factor model, 0.6558 (95% CI 0.6137 to 0.6980) for the acylcarnitine factors model, 0.7347 (95% CI 0.6969 to 0.7725) for the traditional risk factor plus acylcarnitine factors model (P < 0.05 for comparison of the traditional risk factor model with the traditional risk factor plus acylcarnitine factors model)