Table 2.
Mean Ambulatory Blood Pressures by Presence of Retinal Vein Occlusion
| RVO* (n = 20) |
Non-RVO (n = 20) |
Difference (95% CI) |
P-value† | |
|---|---|---|---|---|
| 24-h Ambulatory SBP, mean mmHg (± SD) | 144.3 (16.6) | 135.9 (12.0) | 8.4 (−0.8, 17.6) | 0.074 |
| 24-h Ambulatory DBP, mean mmHg (± SD) | 79.4 (8.6) | 76.8 (9.3) | 2.6 (−3.1, 8.3) | 0.37 |
| Awake SBP average, mean mmHg (± SD) | 146.2 (16.1) | 139.6 (11.3) | 6.65 (−2.3, 15.6) | 0.14 |
| Sleep SBP average, mean mmHg (± SD) | 138.4 (19.8) | 123.1 (15.2) | 15.3 (3.9, 26.6) | 0.010 |
| Awake DBP average, mean mmHg (± SD) | 81.0 (7.9) | 79.6 (9.8) | 1.4 (−4.3, 7.1) | 0.63 |
| Sleep DBP average, mean mmHg (± SD) | 74.4 (11.9) | 67.8 (8.6) | 6.7 (0.1, 13.3) | 0.047 |
| Average Systolic BP Dip, % (mean ± SD) | 6.1 (6.2) | 11.9 (5.8) | −5.8 (−9.7, −2.0) | 0.004 |
| Proportion of Non-dippers, % (n) | 85.0 (17) | 45.0 (9) | n/a | 0.008‡ |
| Adjusted proportion of Non-dippers, % (95% Confidence Interval) | 83.5 (57.9, 94.9) | 44.3 (23.3, 67.5) | n/a | 0.021** |
| Adjusted proportion of Non-dippers, % (95% Confidence Interval) | 84.4 (57.9, 95.5) | 45.2 (23.0, 69.5) | n/a | 0.026†† |
| Adjusted proportion of Non-dippers, % (95% Confidence Interval) | 80.8 (52.8, 94.1) | 50.4 (26.1, 74.5) | n/a | 0.102‡‡ |
*
Total, n = 40; RVO, n = 20; Control, n = 20. BP, blood pressure; SBP, systolic blood pressure; DBP, diastolic blood pressure; BP Dip, nocturnal blood pressure dipping ratio as we defined as the ratio of change in mean daytime and nighttime systolic blood pressures to mean daytime systolic blood pressure
†
Based on two-sample Student’s T-test by presence of RVO
‡
Based on Pearson’s Chi-square test
**
Adjusted for race, diabetes, and smoking status
††
Adjusted for race, diabetes, smoking status, and hypertension
‡‡
Adjusted for race, diabetes, smoking status, and continuous clinic SBP variable