Table 1.

Characteristics of Subject Groups.

Group	Non-Diabetic Controls	No Retinopathy	Moderate or Mild Non-proliferative Retinopathy
Number of subjects	22	23	20
Age (Years)	51.0 ±9.2	52.5 ± 9.5	58.2 ± 6.9
Gender	11M:11F	12M:11F	14M:6F
Blood Pressure (mm Hg)	117.3/73.8 ± (16.2/8.0)	121.2/75.4 ± (13.8/8.0)	125.2/75.1 ± (15.7/11.0)
Retinal thickness (microns)	245.2 ± 13.6	247.3 ± 12.2	244.9 ± 21.0
Duration of Diabetes (years)	N/A	8.2 ± 2.5	10.7 ± 5.9
HbA1c (%)	N/A	8.8 ± 1.6	9.0 ± 1.8

Values are means ± SD.