Determining Risk Factors That Affect Progression in Patients with Nonproliferative Diabetic Retinopathy

Table 7

Estimated average transition rate matrix over time (±SD) for a non-Hispanic individual, assuming that other risk factors take their mean values.

From	To
	Mild NPDR	Moderate NPDR	Severe NPDR	PDR
No retinopathy	0.209 (±0.044)	0.068 (±0.026)	0.003 (±0.008)	<0.001 (±0.002)
Mild NPDR	—	0.142 (±0.026)	0.013 (±0.010)	0.027 (±0.010)
Moderate NPDR	—	—	0.097 (±0.020)	0.034 (±0.012)
Severe NPDR	—	—	—	0.172 (±0.036)

Estimated 0.0004; NPDR = nonproliferative diabetic retinopathy; PDR = proliferative diabetic retinopathy; SD = standard deviation.