Table 1

 Characteristics of the study groups (SD)

ControlNo-DRNo-PDRPDR
Number (male/female)108 (62/46)146 (70/76)78 (42/36)24 (13/11)
Age (years)55.9 (15.5)58 (13.3)60.0 (13.3)56.1 (10.1)
Duration of diabetes (years)8.1 (6.9)13.3 (7.2)14.5 (8.4)
HbA1c (%)7.5 (1.7)8.2 (1.8)7.6 (1.3)
Systolic blood pressure (mm Hg)124.0 (11.5)123.2 (15.3)131.2 (16.0)134.0 (14.2)
Diastolic blood pressure (mm Hg)75.8 (3.7)72.5 (4.6)70.9 (9.7)75.5 (9.9)