Table 2.

Risk prediction of complements for DKD at different stages.

Significant risk factors	G1	G 2	G 3	G 4	G 5
C3 (+0.1 g/L)	Ref.	0.956, 0.910 to 1.003, p=0.068	0.885, 0.842 to 0.931, p<0.001	0.822, 0.767 to 0.880, p<0.001	0.646, 0.598 to 0.698, P<0.001
C4 (+0.1 g/L)	Ref.	1.323,1.132 to 1.546, P<0.001	1.627, 1.395 to 1.897, p<0.001	1.839, 1.521 to 2.224, p<0.001	1.689, 1.407 to 2.027, P<0.001
C1q (+10mg/L)	Ref.	1.044, 1.000 to 1.090, P=0.049	1.039, 0.998 to 1.082, p=0.063	1.041, 0.987 to 1.098, P=0.142	1.030, 0.978 to 1.084, P=0.261
After propensity score matching for age, gender, SBP, HbA1C, TG and ACR
C3 (+0.1 g/L)	Ref.	1.079, 1.000 to 1.160, P=0.038	0.960, 0.885 to 1.041, P=0.322	0.911, 0.813 to 1.021, P=0.110	0.722, 0.616 to 0.847, P<0.001
C4 (+0.1 g/L)	Ref.	1.830, 1.436 to 2.332, P<0.001	1.860, 1.433 to 2.413, P<0.001	1.879, 1.291 to 2.735, P=0.001	2.776, 1.670 to 4.610, P<0.001
C1q (+10 mg/L)	Ref.	1.038, 0.973 to 1.107, P=0.256	1.100, 1.022 to 1.183, P=0.011	1.101, 0.997 to 1.216, P=0.058	1.123, 0.973 to 1.296, P=0.111

C3, Complement 3; C4, Complement 4; C1q, Complement 1q. Data are expressed as odds ratio, 95% confidence interval, P value.