Table 3.

Functional residual capacity (FRC) and total lung capacity (TLC) in the reclined position

		Patients	Controls	Difference (95% CI)	p Value
	N	21*	30
FRC (L)	Median (IQR)	2.50 (2.32 to 3.60)	2.78 (2.26 to 2.90)	−0.27 (−0.71 to 0.12)	0.162†
FRC (% predicted)		76.0 (66.5 to 89.5)	90.0 (79.8 to 105.0)	−14.0 (−22.0 to −5.0)	0.003†
TLC (L)	Mean (SD)	4.40 (0.37)	6.22 (0.28)	−1.83 (−2.75 to −0.92)	0.002‡
TLC (% predicted)		75.3 (16.0)	103.7 (12.4)	−28 (−37.3 to −19.6)	<0.001‡

*6 of 27 patients were unable to complete two reclined FRC measurements.

†p Value calculated using Mann-Whitney U test.

‡p Value calculated using Student’s t-test.