157940.fig.001a
(a)
157940.fig.001b
(b)
157940.fig.001c
(c)
157940.fig.001d
(d)
157940.fig.001e
(e)
157940.fig.001f
(f)
Figure 1: Prevalence of NDR, NPDR, and PDR for the related risk factors. All had P value < 0.01 by the trend test.