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. 2018 Jan 24;18:14. doi: 10.1186/s12890-018-0576-x

Table 2.

Changes of mean airway pressure and PCO2 in patients with baseline PCO2 > 55 mmHg under different experimental conditions

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Condition A B C D
Mechanically gene-rated flow rate (L/min) 20 40 40 40
Effective nasal flow rate (L/min) 20 40 20 40
Mean airway pressure (mbar ± SD) 0.57 ± 0.38
p = 0.03		 2.3 ± 1.6
p = 0.02		 1.63 ± 1.4
p = 0.08		 2.13 ± 1.7
p = 0.05
PO2 (% baseline PO2 ± SD) 99.2 ± 18.9
p = 0.2		 93.1 ± 15.7
p = 0.18		 93.8 ± 17.6
p = 0.12		 93.5 ± 11.9
p = 0.05
PCO2 (% baseline PCO2 ± SD) 94.2 ± 8.3
p = 0.01		 93.5 ± 4.4
p = 0.000		 90.5 ± 7.2
p = 0.005		 86.8 ± 3.8
p = 0.001

All values are mean ± SD. SD standard deviation