Analysis of UK home oxygen service serious events of adverse nature (SEANs) by region, 2010–2012
| Region | Level 3–5 SEAN | Patients | Patients per SEAN | Fires per patient % |
| Yorkshire and Humber | 18 | 9000 | 500 | 0.20 |
| West Midlands | 13 | 9500 | 725 | 0.13 |
| North London | 7 | 6500 | 925 | 0.11 |
| North West | 12 | 13 000 | 1075 | 0.09 |
| Wales | 6 | 7000 | 1150 | 0.09 |
| East Midlands | 6 | 8000 | 1325 | 0.08 |
| All regions | 62 | 53 000 | 1170 | 0.12 |
Annualised data: one level 3–5 SEAN per 1060 patients per annum (Air Products, Allentown, PA, USA).