Table 1 Covariates compared between low- and high-risk cognitively unimpaired older adults

Arteriole diameter

87.7 ± 12.1 µm

92.0 ± 14.5 µm

0.097

Venule diameter

113 ± 13.9 µm

116 ± 15.0 µm

0.29

Arteriole distance from the fovea

13.6 ± 2.38°

14.4 ± 2.33°

0.078

Venule distance from the fovea

14.9 ± 1.76°

15.2 ± 1.70°

0.47

Arteriole linear distance of sampling

6.39 ± 1.67 mm

6.29 ± 1.39 mm

0.73

Venule linear distance of sampling

6.05 ± 0.90 mm

5.88 ± 1.07 mm

0.37