Table 1

Change in retrobulbar blood flow findings for all patients with OAG from baseline to 4 years

 Baseline4-yearChange from baseline to 4 yearsp Value
NMean (95% CI)NMean (95% CI)Mean (95% CI)
OA PSV11222.17 (19.96 to 24.62)7721.81 (19.50 to 24.38)−0.36 (−2.13 to 1.27)0.669
OA EDV1125.43 (4.90 to 6.02)774.55 (4.02 to 5.15)−1.05 (−1.62 to −0.53)0.000*
OA RI1120.755 (0.773 to 0.736)770.793 (0.811 to 0.773)0.044 (0.066 to 0.024)0.000*
CRA PSV1128.04 (7.43 to 8.65)787.94 (7.26 to 8.62)−0.10 (−0.59 to 0.39)0.688
CRA EDV1122.22 (2.04 to 2.43)782.04 (1.85 to 2.25)−0.20 (−0.41 to 0.00)0.046*
CRA RI1120.707 (0.690 to 0.725)780.733 (0.715 to 0.752)0.026 (0.008 to 0.044)0.006*
NPCA PSV1117.53 (7.01 to 8.05)787.81 (7.29 to 8.33)0.28 (−0.12 to 0.68)0.166
NPCA EDV1112.39 (2.21 to 2.59)782.37 (2.17 to 2.59)−0.02 (−0.22 to 0.16)0.804
NPCA RI1110.666 (0.648 to 0.684)780.686 (0.666 to 0.705)0.020 (0.001 to 0.039)0.043*
TPCA PSV1127.72 (7.19 to 8.24)788.02 (7.45 to 8.59)0.30 (−0.12 to 0.73)0.157
TPCA EDV1122.38 (2.20 to 2.57)782.35 (2.17 to 2.55)−0.02 (−0.21 to 0.15)0.785
TPCA RI1120.683 (0.701 to 0.664)780.701 (0.718 to 0.683)0.019 (0.039 to 0.000)0.049*
  • Baseline NPCA and 4-year follow-up OA measurements were unable to be obtained in one patient due to poor image quality.

  • *Denotes a statistically significant difference between baseline and 4-year follow-up for all patients (p<0.05).

  • CRA, central retinal artery; EDV, end diastolic velocity; NPCA, nasal posterior ciliary artery; OA, ophthalmic artery; OAG, open-angle glaucoma; PSV, peak systolic velocity; RI, resistive index; TPCA, temporal posterior ciliary artery.