Table 3.
Comparison of color Doppler ultrasonography parameters among groups.
| Parameters | Group 1 (n = 32) | Group 2 (n = 35) | Group 3 (n = 35) | p Value | Pairwise comparisons | |||
|---|---|---|---|---|---|---|---|---|
| CRA PSV (cm/s) | Mean ± SD | 19.9 ± 3.1 | 15.9 ± 4.1 | 12.3 ± 2.5 | <0.001 | 0.01 a | <0.001 b | <0.001 c |
| (Range) | (11.5–24.6) | (8.7–23.5) | (7.3–16.36) | |||||
| CRA EDV (cm/s) | Mean ± SD | 6.6 ± 1.5 | 4.8 ± 1.6 | 4.3 ± 1.6 | <0.001 | 0.01 a | <0.001 b | 0.11 c |
| (Range) | (3.7–9.1) | (2.0–9.4) | (2.3–7.63) | |||||
| CRA RI | Mean ± SD | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.6 ± 0.1 | 0.15 | |||
| (Range) | (0.57–0.79) | (0.52–0.82) | (0.42–0.80) | |||||
| CRA PI | Mean ± SD | 1.1 ± 0.2 | 1.2 ± 0.3 | 1.1 ± 0.3 | 0.45 | |||
| (Range) | (0.78–1.45) | (0.79–1.72) | (0.61–1.72) | |||||
| OA PSV (cm/s) | Mean ± SD | 44.6 ± 5.2 | 43.8 ± 4.0 | 36.5 ± 5.9 | <0.001 | 0.82 a | <0.001 b | <0.001 c |
| (Range) | (37–56.4) | (31.60–50.60) | (20.92–45) | |||||
| OA EDV (cm/s) | Mean ± SD | 12.5 ± 3.1 | 11.1 ± 2.6 | 9.7 ± 2.9 | <0.001 | 0.04 a | <0.001 b | 0.02 c |
| (Range) | (5.7–18.3) | (6.7–14.9) | (5.30–13.20) | |||||
| OA RI | Mean ± SD | 0.7 ± 0.9 | 0.7 ± 0.8 | 0.7 ± 0.1 | 0.46 | |||
| (Range) | (0.54–0.89) | (0.56–0.87) | (0.44–0.87) | |||||
| OA PI | Mean ± SD | 1.43 ± 0.4 | 1.5 ± 0.3 | 1.5 ± 0.3 | 0.52 | |||
| (Range) | (0.89–2.35) | (0.94–2.04) | (0.68–2.08) | |||||
Boldfaced values are statistically significant.
a
p Value between groups 1 and 2.
b
p Value between groups 1 and 3.
c
p Value between groups 2 and 3.
CRA, central retinal artery; EDV, end-diastolic velocity; OA, ophthalmic artery; PI, pulsatility index; PSV, peak systolic velocity; RI, resistive index.