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Table 1 Mean flow density ± SD; (min- max) in the superficial OCT angiogram for each session; AD: Mean of the absolute difference between the first and second session; p Val.: P-value (paired t-test); CR: coefficients of repeatability (95% confidence intervals) and ICC: intraclass correlation coefficient (95% confidence intervals) with and without eye tracker

From: Quantification of macular perfusion using optical coherence tomography angiography: repeatability and impact of an eye-tracking system

  

Vessel density 1

p Value

Vessel density 2

p Value

AD

p Value

CR 95% CI

ICC 95% CI

Mean ± SD (min -max)

with vs. without eye tracker

Mean ± SD (min -max)

with vs. without eye tracker

Mean ± SD

density 1 vs. density 2

(lower limit-upper limit)

(lower limit-upper limit)

whole en face

with eye tracker

54.4 ± 1.9 (51.3–56.8)

0.79

54.2 ± 2.1 (48.5–57.3)

0.55

1.3 ± 0.9

0.50

3.07 (1.88–4.26)

0.70 (0.37–0.87)

without eye tracker

54.3 ± 2.0 (49.0–56.6)

54.4 ± 1.8 (51.5–58.0)

1.3 ± 1.1

0.81

3.33 (2.04–4.62)

0.62 (0.25–0.83)

fovea

with eye tracker

32.7 ± 4.1 (23.7–38.3)

0.61

32.7 ± 3.9 (21.9–39.6)

0.21

1.5 ± 1.2

0.98

3.88 (2.38–5.38)

0.88 (0.72–0.95)

without eye tracker

33.0 ± 4.0 (22.8–41.1)

33.2 ± 3.7 (22.6–38.6)

1.4 ± 1.1

0.61

3.50 (2.15–4.86)

0.89 (0.75–0.96)

parafovea

with eye tracker

56.2 ± 2.2 (52.5–60.0)

0.72

56.1 ± 2.4 (49.7–59.7)

0.99

1.4 ± 0.9

0.74

3.37 (2.06–4.67)

0.72 (0.41–0.88)

without eye tracker

56.1 ± 2.1 (52.0–59.1)

56.1 ± 2.1 (52.2–59.9)

1.5 ± 1.0

0.98

3.60 (2.20–4.99)

0.62 (0.25–0.83)

temporal

with eye tracker

54.5 ± 2.3 (50.8–59.1)

0.50

54.5 ± 2.7 (48.2–58.1)

.034

1.2 ± 1.1

0.97

3.31 (2.03–4.59)

0.77 (0.51–0.90)

without eye tracker

54.8 ± 2.5 (50.1–58.2)

54.9 ± 2.4 (50.9–59.5)

1.8 ± 1.3

0.79

4.36 (2.67–6.05)

0.59 (0.22–0.82)

superior

with eye tracker

57.6 ± 2.4 (54.6–63.0)

0.36

57.6 ± 2.2 (53.5–61.0)

0.44

1.4 ± 1.1

0.88

3.53 (2.17–4.90)

0.69 (0.36–0.86)

without eye tracker

57.2 ± 2.4 (52.0–61.0)

57.1 ± 2.9 (51.6–62.6)

1.5 ± 1.3

0.82

3.92 (2.40–5.44)

0.72 (0.41–0.88)

nasal

with eye tracker

55.1 ± 2.6 (50.3–59.9)

0.75

54.3 ± 2.4 (48.6–58.3)

0.17

1.5 ± 0.8

0.04

3.10 (1.90–4.30)

0.81 (0.57–0.92)

without eye tracker

54.9 ± 2.8 (49.9–58.8)

55.0 ± 2.0 (51.2–59.1)

2.5 ± 1.7

0.89

6.01 (3.68–8.33)

0.18 (− 0.27–0.57)

inferior

with eye tracker

57.8 ± 2.7 (52.0–61.6)

0.47

57.5 ± 3.5 (47.3–62.0)

0.74

1.9 ± 1.4

0.69

4.65 (2.85–6.45)

0.71 (0.39–0.87)

without eye tracker

57.5 ± 2.7 (53.2–61.6)

57.3 ± 2.9 (49.9–61.8)

2.4 ± 1.8

0.78

5.94 (8.25–3.64)

0.40 (− 0.04–0.71)