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

Table 3 Correlations between baseline information and laboratory data and plasma melatonin concentrations

Baseline information and laboratory data	Plasma melatonin concentrations
	r	P value
Age	-0.1018	0.078
Gender	-0.1428	0.013
Diabetes duration	-0.5623	< 0.001
SBP	-0.2224	< 0.001
DBP	-0.1326	0.022
MAP	-0.2146	< 0.001
Hypertension	0.1429	0.013
BMI	-0.09046	0.118
Smoking	-0.0543	0.349
Drinking	-0.06159	0.288
FBG (mg/dL)	-0.464	< 0.001
HbA1C (%)	-0.481	< 0.001
Triglycerides (mmol/L)	0.04224	0.466
Total cholesterol (mmol/L)	0.01544	0.790
LDL cholesterol (mmol/L)	0.02813	0.628
HDL cholesterol (mmol/L	-0.01587	0.784
Total bilirubin (mmol/L)	0.4386	< 0.001
AST (U/L)	-0.06536	0.259
ALT (U/L)	-0.06815	0.239

SBP: Systolic blood pressure; DBP: Diastolic blood pressure; MAP: Mean arterial pressure; FBG: Fasting blood glucose; HbA1C: Hemoglobin A1C; BMI: Body mass index; LDL: Low-density lipoprotein; HDL: High-density lipoprotein; AST: Aspartate transaminase; ALT: Alanine aminotransferase.