TABLE 2

Differences in in vitro functional residual capacity (FRC) measurements from the lung model functional residual capacity for four different lung volumes

Lung model FRC volume	Subjects	WIMR		EM		ndd v.2.00		ndd v.2.01
Lung model FRC volume	Subjects	Absolute	Relative	Absolute	Relative	Absolute	Relative	Absolute	Relative
2.31	9	−0.01±0.02	−0.2±0.8%	0.07±0.02	3.3±1.0%	−0.54±0.14	−23.4±6.1%	−0.15±0.04	−6.3±1.7%
2.11	9	−0.01±0.02	−0.43±0.9%	0.06±0.02	2.9±0.9%	−0.39±0.12	−18.5±5.7%	−0.11±0.03	−5.2±1.5%
1.81	9	0.03±0.02	1.6±1.4%	0.07±0.02	3.7±1.0%	−0.44±0.11	−24.1±6.4%	−0.09±0.03	−4.7±1.6%
1.51	9	0.02±0.03	1.7±13.1%	0.02±0.02	1.1±1.3%	−0.26±0.05	−17.1±3.0%	−0.08±0.02	−5.0±1.2%

Data presented as mean±sd, unless otherwise stated. Absolute measurements are in litres. WIMR: Woolcock in-house device; EM: Exhalyzer D device; ndd v.2.00: EasyOne Pro LAB device Version 2.00.01.05; ndd v.2.01: EasyOne Pro LAB device analysed in Version 2.01.00.09.