Blood flow velocities in the ophthalmic artery, central retinal artery, central retinal vein, lateral and medial posterior ciliary artery in 46 smokers and 189 non-smokers
|
Smoker Mean (SD) |
Non-smoker Mean (SD) |
t Test p Value | |
| Ophthalmic artery: | |||
| PSV (cm/s) | 41.7 (7.4) | 39.3 (5.3) | 0.009 |
| EDV (cm/s) | 10.4 (2.8) | 9.1 (2.5) | 0.001 |
| RI | 0.74 (0.05) | 0.77 (0.05) | 0.02 |
| Central retinal artery: | |||
| PSV (cm/s) | 11.4 (1.6) | 11.0 (1.7) | NS |
| EDV (cm/s) | 3.2 (0.9) | 3.3 (0.9) | NS |
| RI | 0.71 (0.05) | 0.71 (0.05) | NS |
| Central retinal vein: | |||
| Max (cm/s) | 4.7 (1.0) | 4.5 (1.0) | NS |
| Min (cm/s) | 3.6 (0.8) | 3.3 (0.7) | 0.01 |
| Lateral posterior ciliary artery: | |||
| PSV (cm/s) | 12.1 (2.4) | 11.2 (1.7) | 0.005 |
| EDV (cm/s) | 4.1 (1.3) | 3.7 (1.0) | 0.03 |
| RI | 0.67 (0.06) | 0.68 (0.06) | NS |
| Medial posterior ciliary artery: | |||
| PSV (cm/s) | 11.2 (1.9) | 11.2 (1.7) | NS |
| EDV (cm/s) | 3.7 (1.2) | 3.6 (0.9) | NS |
| RI | 0.68 (0.06) | 0.68 (0.05) | NS |
PSV = peak systolic velocity; EDV = end diastolic velocity; RI = resistivity index; NS = not significant.