Mean (SD) NA-AVR stratified by eye and sex (all, M and F) in normotension and hypertension
| Measure | Eye | Group | Normotension mean | n | Hypertension mean | n | P value | CI |
| NA-AVR (unity) | Left | All | 0.90 (0.10) | 289 | 0.82 (0.09) | 151 | < 0.005 | 0.06 to 0.10 |
| M | 0.91 (0.10) | 99 | 0.82 (0.09) | 94 | < 0.005 | 0.07 to 0.12 | ||
| F | 0.89 (0.11) | 190 | 0.81 (0.09) | 57 | < 0.005 | 0.04 to 0.11 | ||
| Right | All | 0.91 (0.09) | 289 | 0.86 (0.11) | 151 | < 0.005 | 0.03 to 0.07 | |
| M | 0.90 (0.11) | 99 | 0.86 (0.11) | 94 | 0.024 | 0.01 to 0.07 | ||
| F | 0.92 (0.09) | 190 | 0.86 (0.11) | 57 | < 0.005 | 0.03 to 0.08 | ||
| Arterioles (µm) | Left | All | 86.6 (10.9) | 289 | 78.5 (10.3) | 151 | < 0.005 | 6.0 to 10.2 |
| M | 87.3 (10.3) | 99 | 79.0 (10.1) | 94 | < 0.005 | 5.4 to 11.2 | ||
| F | 86.2 (11.2) | 190 | 77.7 (10.5) | 57 | < 0.005 | 5.2 to 11.8 | ||
| Right | All | 88.8 (10.2) | 289 | 83.0 (10.2) | 151 | < 0.005 | 3.8 to 7.8 | |
| M | 87.8 (11.0) | 99 | 83.5 (9.6) | 94 | < 0.005 | 1.4 to 7.3 | ||
| F | 89.3 (9.7) | 190 | 82.3 (11.0) | 57 | < 0.005 | 4.0 to 10.0 | ||
| Venules (µm) | Left | All | 97.3 (11.1) | 289 | 96.7 (11.1) | 151 | 0.577 | −1.6 to 2.8 |
| M | 96.5 (10.3) | 99 | 97.0 (10.8) | 94 | 0.733 | −3.5 to 2.5 | ||
| F | 97.7 (11.5) | 190 | 96.1 (11.5) | 57 | 0.346 | −1.8 to 5.1 | ||
| Right | All | 98.1 (10.0) | 289 | 97.0 (11.7) | 151 | 0.295 | −1.0 to 3.2 | |
| M | 98.3 (11.0) | 99 | 97.5 (11.9) | 94 | 0.624 | −2.5 to 4.1 | ||
| F | 98.0 (9.4) | 190 | 96.1 (11.4) | 57 | 0.212 | −1.1 to 4.8 |
The mean diameters of the arteriolar and venular components (µm) used to calculate NA-AVR are also given. Two-tailed Student’s t-tests were used to test the null hypotheses of equal means at the 5% significance level (p) and to obtain 95% CIs for the differences between the means. Significant p values are in bold.
F, female; M, male; NA-AVR, nasal–annular arteriole:venule ratio.