Table 3.
Comparison of color Doppler ultrasonography parameters between groups.
| Parameters | Group 1 (n = 30) | Group 2 (n = 31) | Group 3 (n = 29) | p value | Pairwise Comparisons |
|---|---|---|---|---|---|
| mean± SD | |||||
| CRA PSV (cm/s) | 15.6 ± 3.5 | 15.2 ± 3.3 | 13.9 ± 3 | 0.181 | |
| (10.1 to 27.7) | (10.3 to 24.9) | (10.7 to 34.9) | |||
| CRA EDV (cm/s) | 6.8 ± 2.2 | 7.3 ± 3.5 | 5.7 ± 1.8 | 0.920 | |
| (3.5 to 12.6) | (1.67 to 17.3) | (3.25 to 10.8) | |||
| CRA RI | 0.6 ± 0.1 | 0.5 ± 0.2 | 0.6 ± 0.1 | 0.195 | |
| (0.2 to 0.9) | (0.2 to 0.9) | (0.4 to 0.8) | |||
| CRA PI | 0.9 ± 0.2 | 0.9 ± 0.3 | 1.0 ± 0.2 | 0.254 | |
| (0.4 to 1.2) | (0.3 to 1.6) | (0.7 to 1.5) | |||
| OA PSV (cm/s) | 59.3 ± 18.4 | 58.3 ± 19.7 | 70.8 ± 21.9 | <0.001 | 1.00a, 0.025b, 0.016c |
| (25.1 to 87.3) | (19.2 to 98) | (22 to 107) | |||
| OA EDV (cm/s) | 19±9.2 | 21.6 ± 9.6 | 24.2 ± 10.4 | 0.120 | |
| (4.5 to 37.4) | (6.8 to 43.7) | (5.7 to 52) | |||
| OA RI | 0.7 ± 0.1 | 0.6 ± 0.1 | 0.7 ± 0.1 | 0.127 | |
| (0.5 to 0.8) | (0.3 to 0.8) | (0.3 to 0.8) | |||
| OA PI | 1.3 ± 0.3 | 1.2 ± 0.4 | 1.3 ± 0.4 | 0.673 | |
| (0.8 to 1.8) | (0.5 to 2.2) | (0.5 to 2.4) |
CRA: Central retinal artery, OA: Ophthalmic artery, PSV: Peak systolic velocity, EDV: End-diastolic velocity, RI: Resistive index, PI: Pulsatility index.
a
: p value between Group 1 and Group 2.
b
: p value between Group 1 and Group 3.
c
: p value between Group 2 and Group 3. Boldfaced values are statistically significant.