Table 2: General admission characteristics.

- Total NIPPV prior to IMV Only IMV
Variable n Out of % n Out of % n Out of %
All Patients 54 54 100.0% 27 27 100.0% 27 27 100.0%
How Patients Presented
ED
OSH Transfer
Another Provider
22
30
2		 54
40.7%
55.6%
3.7%		 11
15
1
27
40.7%
55.6%
3.7%
11
15
1		 27
40.7%
55.6%
3.7%
Ventilation Mode
Volume Control
Pressure Control
SIMV
Other
24
2
1
14		 41
58.5%
4.9%
2.4%
34.1%
11
1
0
8		 20
55.0%
5.0%
0.0%
40.0%
13
1
1
6		 21
61.9%
4.8%
4.8%
28.6%
Re-intubation[s]
0
1
2+
42
7
1		 50
84.0%
14.0%
2.0%
23
3
0		 26
88.5%
11.5%
0.0%
19
4
1		 24
79.2%
16.7%
4.2%
Tracheostomy 10 54 18.5% 5 27 18.5% 5 27 18.5%
Palliative Care Consultation 21 43 48.8% 11 21 52.4% 10 22 45.5%
Consideration for Lung Transplant 11 51 21.6% 6 25 24.0% 5 26 19.2%
Group n Mean [SD] n Mean [SD] n Mean [SD]
Initial pH 54 7.38 [0.1] 27 7.40 [0.1] 27 7.34 [0.1]
Initial pO2 54 128.4 [108.1] 27 116.7 [90.3] 27 140.2 [124.0]
Initial pCO2 54 49.8 [17.2] 27 47.9 [16.6] 27 51.8 [17.8]
Initial PaO2/FiO2 42 224.8 [114.7] 21 231.5 [162.2] 21 218.2 [128.5]

Legend: ED, Emergency Department; OSH, Outside Hospital; SD, Standard Deviation; SIMV, Synchronized Intermittent Mandatory Ventilation.