视网膜病变程度分级

黄斑水肿组(n = 23, 29.9%)

非黄斑水肿组(n = 44, 70.1%)

χ2

总体P值

两两P值

无DR

5

41

22.840

P = 0.000

P1 = 0.005

轻、中度NPDR

8

10

P2 = 0.000

重度NPDR

0

3

P3 = 0.139