Central retinal vein occlusion | Branch retinal vein occlusion | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Ischaemic (n=18) | Non-ischaemic (n=50) | Ischaemic + non-ischaemic; (n=33) | ||||||||
Affected eye | Unaffected eye | Intragroup p value* | Affected eye | Unaffected eye | Intragroup p value** | Affected eye | Unaffected eye | Intragroup p value* | Intergroup p value** | |
Data expressed as mean (SD). | ||||||||||
*Wilcoxon signed rank sum test to compare affected and unaffected eyes. Tests performed within each group. | ||||||||||
**One way ANOVA to compare the mean value of affected eyes over the three groups. | ||||||||||
RI = resistance index in the central retinal artery; CRVmax = maximal venous flow velocity in the central retinal vein (cm/s); CRVmin = minimum venous flow velocity in the central retinal vein (cm/s); AVT = arteriovenous passage time measured by fluorescein angiography in seconds. | ||||||||||
RI (CRA) | 0.89 (0.11) | 0.79 (0.12) | 0.0002 | 0.84 (0.13) | 0.75 (0.08) | 0.00001 | 0.77 (0.10) | 0.73 (0.11) | 0.0532 | 0.001 |
CRVmin | 1.83 (0.94) | 2.43 (1.06) | 0.0247 | 2.28 (0.73) | 2.91 (1.04) | 0.00001 | 2.48 (0.60) | 2.57 (0.72) | 0.4787 | 0.013 |
CRVmax | 2.94 (1.34) | 3.82 (1.75) | 0.0412 | 3.66 (1.19) | 4.56 (1.49) | 0.00001 | 4.28 (1.18) | 4.47 (1.17) | 0.4012 | 0.001 |
AVT | 17.89 (3.84) | 14.27 (4.23) | 13.06 (4.17) | 0.001 |