Plasma melatonin levels in patients with diabetic retinopathy secondary to type 2 diabetes

Figure 2 Plasma melatonin concentrations in healthy controls and diabetic retinopathy patients. A: Plasma melatonin in the healthy controls, without diabetic retinopathy (NDR), non-proliferative diabetic retinopathy (NPDR) and proliferative diabetic retinopathy (PDR) groups; B: The diagnostic effect of plasma melatonin on diabetic retinopathy was discovered using the receiver operating characteristic curve. ^aP < 0.001. NDR: Without diabetic retinopathy; NPDR: Non-proliferative diabetic retinopathy; PDR: Proliferative diabetic retinopathy; DM: Diabetes mellitus; AUC: Area under the receiver operating characteristic curve.