Serum Extracellular Superoxide Dismutase Is Associated with Diabetic Retinopathy Stage in Chinese Patients with Type 2 Diabetes Mellitus

Table 1

The characteristics of subjects ().

Characteristics	NDR group ()	DR group ()	NPDR group ()	PDR group ()
Age (years)	56.5 ± 11.6	62.0 ± 10.8^∗	60.9 ± 9.7^∗	63.9 ± 12.6^∗
Gender (F/M)	121/150	38/34	22/24	16/10
Duration of T2DM (years)	6.8 ± 5.8	10.7 ± 7.4^∗	10.9 ± 7.4^∗	10.4 ± 7.5^∗
BMI (kg/m^2)	22.3 ± 3.3	22.8 ± 3.3	22.7 ± 3.4	22.9 ± 3.3
SBP (mmHg)	131.5 ± 16.1	138.6 ± 17.4^∗	136.1 ± 14.8	143.0 ± 20.9
DBP (mmHg)	82.6 ± 10.6	83.8 ± 9.9	83.1 ± 9.5	85.0 ± 10.6
FBG (mmol/L)	8.59 ± 3.45	9.66 ± 3.90^∗	9.38 ± 4.11	10.16 ± 3.51^∗
HbA1c (%)	8.8 ± 2.2	9.9 ± 2.4^∗	9.7 ± 2.4^∗	10.2 ± 2.3^∗
Cr (μmol/L)	67.8 ± 18.3	72.9 ± 26.7	70.8 ± 26.2	76.5 ± 27.4^∗
BUN (mmol/L)	5.63 ± 1.97	5.88 ± 1.86	5.82 ± 1.91	6.00 ± 1.78
CYS-C (mg/L)	1.01 ± 0.28	1.20 ± 0.41^∗	1.17 ± 0.40^∗	1.27 ± 0.42^∗
TG (mmol/L)	1.78 ± 1.45	1.67 ± 1.67	1.65 ± 1.61	1.70 ± 1.79
TC (mmol/L)	4.07 ± 1.05	3.88 ± 0.89	3.83 ± 0.89	3.96 ± 0.90
LDL-C (mmol/L)	2.22 ± 0.79	2.11 ± 0.67	2.07 ± 0.63	2.17 ± 0.73
HDL-C (mmol/L)	1.21 ± 0.32	1.21 ± 0.27	1.21 ± 0.27	1.20 ± 0.28

versus NDR.