TABLE 2

Blood gas and nocturnal gas exchange parameters at baseline situation and while using noninvasive ventilation (NIV) in NIV-group patients

	Baseline	Using NIV	p-value
P_aO₂ mmHg	74.32±11.95	84.06±11.42	<0.001
P_aCO₂ mmHg	50.34±8.68	42.11±4.32	<0.001
%sleepS_pO₂<90	30.96±28.74%	1.50±3.5%	<0.001
S_pO₂_mean	91.68±3.03%	95.56±1.50%	<0.001
S_pO₂_min	79.76±9.30%	92.41±3.39%	<0.001

Data are presented as mean±sd unless otherwise stated. P_aO₂: arterial oxygen tension; P_aCO₂: arterial carbon dioxide tension; %sleepS_pO₂<90: time spent with oxygen saturation measured by pulse oximetry (S_pO₂) <90%; S_pO₂_mean: mean S_pO₂; S_pO₂_min: minimum S_pO₂.