Descriptive analyses of nailfold capillary haemodynamic features in controls, all patients with POAG and the following subgroups: patients with the high tension variant of POAG (HTG), patients with the normal tension variant of POAG (NTG), patients with POAG concurrently using topical beta-blocker medication and patients with POAG not concurrently using topical beta-blocker medication
| Blood speed in μm/s, mean (SD) | Capillary diameter in μm, mean (SD) | Blood flow in pL/s, mean (SD) | P values* for blood speed (controls as referent) | P values* for capillary diameter (controls as referent) | P values* for blood flow (controls as referent) | |
| Controls (n=63) | 574 (211) | 10.0 (1.5) | 50.1 (24.2) | – | – | – |
| All POAG (n=67) | 328 (201) | 9.7 (1.5) | 26.8 (17.6) | <0.0001 | 0.20 | <0.0001 |
| HTG (n=34) | 303 (172) | 9.9 (1.5) | 26.8 (18.8) | <0.0001 | 0.78 | <0.0001 |
| NTG (n=27) | 353 (240) | 9.5 (1.5) | 26.2 (16.7) | 0.0002 | 0.15 | <0.0001 |
| POAG using topical beta-blockers (n=27) | 322 (187) | 9.8 (1.4) | 26.4 (15.0) | <0.0001 | 0.49 | <0.0001 |
| POAG not using topical beta-blockers (n=40) | 328 (223) | 9.5 (1.6) | 27.3 (21.2) | <0.0001 | 0.17 | <0.0001 |
*Unpaired t-test.
HTG, high tension glaucoma; NTG, normal tension glaucoma; POAG, primary open-angle glaucoma.