Table 2—

Mean inspiratory(X̄_insp) and mean expiratory (X̄_exp) reactance and their difference (ΔX̄_rs) at the considered continuous positive airway pressure (CPAP) values in chronic obstructive pulmonary disease (COPD) and restricted patients in the seated and supine position

CPAP cmH₂O	Seated			Supine
CPAP cmH₂O	X̄_insp	X̄_exp	ΔX̄_rs	X̄_insp	X̄_exp	ΔX̄_rs
COPD
0	−3.70±1.96	−6.30±2.86	2.60±3.04	−4.42±1.54	−9.56±4.32	5.14±3.13
Min.÷max.	−6.92÷ −1.36	−9.01÷ −1.78	−1.01÷5.5	−5.86÷ −2.24	−13.47÷ −3.39	1.15÷8.79
4	−3.77±1.64	−4.55±2.79	0.78±1.56	−4.16±1.75	−6.92±3.87	2.77±2.29
Min.÷max.	−5.19÷ −0.87	−8.5÷ −0.42	−0.96÷3.88	−5.36÷ −1.55	−10.63÷ −1.64	0.09÷5.27
8	−3.71±2.03	−4.21±2.19	0.51±0.92	−3.62±1.74	−4.99±2.57	1.37±1.10
Min.÷max.	−5.75÷ −1.09	−7.27÷ −1.34	−0.22÷1.47	−5.67÷ −1.42	−7.28÷ −1.44	0.02÷2.68
12	−3.41±1.46	−4.36±3.41	0.95±2.86	−3.20±1.40	−3.92±1.96	0.72±0.63
Min.÷max.	−5.6÷ −1.07	−11.05÷ −0.76	−1.05÷7.10	−4.46÷ −1.26	−5.89÷ −1.21	−0.05÷1.43
Restricted
0	−5.66±3.72	−4.66±0.58	−0.89±3.56	−4.13±5.51	−3.31±3.50	−0.39±5.31
Min.÷max.	−11.14÷ −3.09	−5.39÷ −4.01	−8.22÷1.05	−12.02÷ −3.7	−12.86÷ −2.71	−8.26÷2.63
4	−2.84±0.79	−3.37±0.69	0.52±0.86	−2.23±3.08	−2.55±3.33	0.66±0.87
Min.÷max.	−3.52÷ −1.99	−3.95÷ −2.57	−0.5÷1.59	−13.51÷ −1.95	−12.61÷ −1.7	−0.89÷1.59
8	−3.81±1.42	−3.66±0.87	−0.15±0.60	−3.02±3.23	−2.75±3.23	0.20±0.82
Min.÷max.	−4.92÷ −1.79	−4.37÷ −2.51	−0.64÷0.72	−12÷ −1.73	−9.57÷ −1.77	−2.43÷0.04
12	−3.32±0.75	−3.15±1.13	−0.16±0.60	−2.12±3.21	−2.54±3.19	0.78±1.17
Min.÷max.	−3.91÷ −2.28	−4.55÷ −1.79	−0.6÷0.71	−12÷ −1.26	−8.78÷ −0.84	−3.22÷0.71

Data are presented as mean±sd in cmH₂O·s·L⁻¹, unless otherwise stated. Min.: minimum; max.: maximum.