Analysis of UK home oxygen service serious events of adverse nature (SEANs) by severity
| SEAN level | Smoking | Fire | Total |
| Level 5: fatal | 2 (50%) | 2 (50%) | 4 |
| Level 4: hospitalisation | 6 (46%) | 7 (54%) | 13 |
| Level 3: medical attention | 35 (78%) | 10(22%) | 45 |
Data are from October 1, 2009 to November 8, 2010 (Air Products, Allentown, PA, USA).