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Table 2 summary of inter-visit variability in healthy young subjects

From: The inter-visit variability of retinal blood flow velocity measurements using retinal function imager (RFI)

Characteristics 1st Visit 2nd Visit P CCC CV
Mean ± SD Mean ± SD
BFV of arterioles (mm/s) 3.6 ± 0.8 3.5 ± 0.8 0.44 0.72 10.8%
BFV of venules (mm/s) 3.0 ± 0.7 3.0 ± 0.7 0.96 0.67 11.0%
No. of the segments of arterioles 30 ± 7 29 ± 7 0.43 0.35 16.9%
No. of the segments of venules 32 ± 9 32 ± 10 0.83 0.64 14.6%
Systolic blood pressure (mmHg) 109.5 ± 12.1 109.9 ± 12.6 0.81 0.82 3.7%
Diastolic blood pressure (mmHg) 65.2 ± 8.1 67.6 ± 10.0 0.56 0.69 6.2%
Heart rate (beats per min) 66.6 ± 10.3 67.8 ± 10.4 0.43 0.59 6.8%
IOP (mmHg) 13.5 ± 2.9 13.3 ± 2.8 0.59 0.79 7.0%
  1. BFV = blood flow velocity; IOP = intraocular pressure; CCC = concordance correlation coefficient; CV = coefficient of variance