Table 6

Hospital admissions before and after initiation of non-invasive ventilation

Type of ventilation/diagnosis (n)		No. of hospital admissions/patient years
Type of ventilation/diagnosis (n)		Pre-NIV	Post-NIV
Negative pressure
Poliomyelitis (25)	5/606^6-152	39/606^6-151 ^6-152
Non-Duchenne's myopathy (2)	0/8.3	0/8.3
Motor neurone disease (2)	1/46	0/46
Diaphragmatic paralysis (1)	0/11	0/11
Multiple sclerosis (1)	0/2.8	0/2.8
N/MIPPV
Poliomyelitis (20)	4/66	1/66
Duchenne's muscular dystrophy (15)	7/30	6/30
Other myopathies (2)	0/8.3	0/8.3
Motor neurone disease (2)	0/9.7	0/9.7
Peripheral neuropathy (1)	0/0.4	0/0.4
Multiple sclerosis (2)	0/2.8	0/2.8
Kyphoscoliosis (5)	0/12.6	0/12.6
S/P lobectomy/thoracoplasty (1)	0/2.7	0/2.7

NIV = non-invasive ventilation.
↵6-151 Significantly different from pre-NIV hospital admissions, p<0.01 (paired t test).
↵6-152 Significantly different from corresponding M/NIPPV-polio group, p<0.01 (Wilcoxon rank sum test).