Table 2.

Comparisons of expression of plasma miR-21 of patients in each group

Variable	Control	NDR	BDR	PDR
CtU6	27.05 ± 0.21	27.01 ± 0.17	27.36 ± 0.15	27.38 ± 0.16
CtmiR-21	29.27 ± 0.16	29.15 ± 0.18	28.82 ± 0.23*†	28.63 ± 0.20*†‡
2−ΔΔCt	1.00	1.06 ± 0.01	1.70 ± 0.09*†	1.96 ± 0.05*†‡

*, compared with the control group, P<0.05; ^†, compared with the NDR group, P<0.05; ^‡, compared with the BDR group, P < 0.05.