Impact of location on appropriate use of NIV
| Location | Appropriately commenced on NIV | Inappropriately commenced on NIV | pvalue(Chi squared) |
| Accident & Emergency | 71%(n=66) | 29%(n=27) | 0.030 |
| Medical Assessment Unit | 50%(n=9) | 50%(n=9) | 0.002 |
| Respiratory specialist areas(Respiratory ward and Medical High Dependancy Unit) | 87%(n=121) | 13%(n=18) | 0.014 |
table2