| 2007 | 2008 | Relative risk (95% CI) | p Value | |
| Oxygen prescribed | 15/85 (17.6%) | 39/98 (39.8%) | 2.3 (1.3 to 3.9) | 0.001 |
| Oxygen prescribed adequately† | 5/85 (5.9%) | 36/98 (36.7%) | 6.2 (2.5 to 15.0) | <0.001 |
| Assessment‡ | ||||
| Ambulance | 22/99 (22.2%) | 9/70 (12.9%) | 0.6 (0.3 to 1.2) | 0.10 |
| Emergency | 25/66 (37.9%) | 18/41 (43.9%) | 1.2 (0.7 to 1.8) | 0.54 |
| Ward | 9/38 (23.7%) | 10/26 (38.5%) | 1.6 (0.8 to 3.4) | 0.20 |
| Monitoring§ | ||||
| Emergency | 137/148 (92.6%) | 104/107 (97.2%) | 1.1 (1.0 to 1.1) | 0.11 |
| Ward | 83/85(97.6%) | 96/98 (98.0%) | 1.0 (1.0 to 1.1) | 0.89 |
| Titration* | ||||
| Emergency | 14/16(87.5%) | 9/12 (75%) | 0.9 (0.6 to 1.3) | 0.39 |
| Ward | 8/12 (66.7%) | 4/9 (44.4%) | 0.7 (0.3 to 1.5) | 0.31 |
*Oxygen uptitrated in response to oxygen saturations ⩾92% on ⩾2 occasions.
†Device, flow rate or Fio2 stated.
‡Assessment of saturations on room air.
§Oxygen saturations recorded ⩾2 within a 24-hour period.