Prognostic factors associated with the main outcome measure (BCVA decrease≥0.3 logMAR) for all patients (CRAO+BRAO)
| Visual acuity decrease≥0.3 logMAR | P value |
| CRAO | 0.551 |
| BRAO | 0.551 |
| High blood pressure | 0.578 |
| Dyslipidaemia | 0.185 |
| Diabetes | 0.548 |
| Anticoagulants on referral | 0.622 |
| Antiplatelets on referral | 0.044 |
| Aetiology: | |
| Embolic heart disease | 0.576 |
| Carotid stenosis | 1.000 |
| High blood pressure on referral to the hyperbaric department | 0.693 |
| Hypertension during the first hyperbaric session | 1.000 |
| First hyperbaric session <12 hours after onset of symptoms | 1.000 |
| HBOT initiated during the first hour of arrival at the hyperbaric oxygen department | 0.232 |
| Barotrauma | 0.920 |
| Twice daily sessions | 0.232 |
| No of hyperbaric sessions | 0.488 |
| Treatment initiated (antiplatelet or anticoagulant) | 0.587 |
| BCVA on referral | 0.008 |
| Revascularisation at day 14 | 1.000 |
| Revascularisation at day 21 | 0.607 |
| CMT on referral | 0.798 |
| CMT at day 30 | 0.905 |
| SCT on referral on EDI | 0.598 |
| SCT at day 30 on EDI | 0.931 |
| VD on referral on OCT-A | 0.560 |
| VD at day 30 on OCT-A | 0.242 |
BCVA, best-corrected visual acuity; BRAO, branch retinal artery occlusion; CMT, central macular thickness; CRAO, central retinal artery occlusion; EDI, enhanced depth imaging; HBOT, hyperbaric oxygen therapy; logMAR, Logarithm of the Minimum Angle of Resolution; OCT-A, optical coherence tomography-angiography; SCT, subfoveal choroidal thickness; VD, vessel density.