Table 5B.

Agreement estimates of measurements based on the whole fundus on photographs taken repeatedly under similar conditions.

	Good	Usable	Reject
Artery	n = 330	n = 35	n = 161
Arc	0.75 (0.70–0.79)*	0.55 (0.32–0.72)*	0.56 (0.46–0.64)*
Chord	0.76 (0.71–0.79)**	0.54 (0.31–0.71)*	0.56 (0.46–0.64)*
Length diameter ratio	0.80 (0.76–0.83)**	0.64 (0.44–0.78)*	0.59 (0.50–0.67)*
Mean diameter	0.78 (0.74–0.81)**	0.74 (0.58–0.85)*	0.65 (0.57–0.72)*
Weighted diameter	0.81 (0.78–0.84)**	0.80 (0.68-0.88)**	0.74 (0.68–0.80)*
Vein	n = 330	n = 34	n = 137
Arc	0.75 (0.71–0.79)**	0.68 (0.49–0.80)*	0.58 (0.48–0.66)*
Chord	0.76 (0.72–0.79)**	0.66 (0.46–0.79)*	0.59 (0.49–0.67)*
Length diameter ratio	0.78 (0.74–0.81)**	0.76 (0.60–0.86)**	0.63 (0.53–0.70)*
Mean diameter	0.80 (0.76–0.83)**	0.61 (0.40–0.76)*	0.73(0.66–0.79)*
Weighted diameter	0.82 (0.78–0.85)**	0.69 (0.51–0.82)*	0.74 (0.66–0.79)*

*Moderate: between 0.5 and 0.75, **Good: between 0.75 and 0.9, ***Excellent: >0.90. ICC, intraclass correlation; CI, confidence interval; CRAE, central retinal artery equivalent; CRVE, central retinal vein equivalent; Weighted diameter: mean diameter weighted by segment length.