| 2005–6, n (%) | 2006–7, n (%) | |
| Domiciliary NIV initiated | 86 | 98 |
| Age | 55.9 (range 13–85) | 54.2 (range 17–83) |
| Male | 40 (46.5) | 45 (45.9) |
| Female | 46 (53.5) | 53 (54.1) |
| Elective admission | 43 (50.6) | 53 (54.1) |
| Emergency admission | 42 (49.4) | 45 (45.9) |
| NIV initiated post weaning from mechanical ventilation | 9 (10.5) | 8 (8.2) |
| Diagnostic groups | ||
| Neuromuscular disease* | 31 (36.0) | 24 (24.7) |
| Obstructive airways disease | 21 (24.4) | 21 (23.8) |
| Chest wall disease | 10 (11.6) | 7 (7.2) |
| Obstructive sleep/obesity hypoventilation syndrome | 21 (24.5) | 40 (41.3) |
| Other* | 6 (7.0) | 3 (3.0) |
*Includes (in order of frequency) DMD, post polio syndrome, MND, myotonic dystrophy, idiopathic diaphragm paralysis, LGMD, SMA, acid maltase deficiency, FSH, HSMN, CIDP, inclusion body myositis and myasthenia gravis.
†Includes central hypoventilation, brainstem CVA, spina bifida, Cheyne-Stokes respiration, primary pulmonary hypertension.