Table 2.

Distribution of lung density measurements in normal ward and intensive care unit

Parameter	Normal ward	Intensive care unit	p
Overall lung volume (dl)	31.16 IQR: 9.99	22.22 IQR: 13.98	0.003*
Low-density volume (dl)	6.92 IQR: 2.61	3.14 IQR: 5.73	0.014*
Low-density percentage	0.22 IQR: 0.16	0.10 IQR: 0.08	0.076
Medium-density volume (dl)	27.92 IQR: 10.40	18.13 IQR: 6.76	0.012*
High-density volume (dl)	7.21 IQR: 4.40	11.96 IQR: 3.62	0.007*
Low-density index	0.22 IQR: 0.16	0.10 IQR: 0.08	0.076
PD15 (g/l)	62 IQR: 52	93 IQR: 22	0.301

Significant p-values are indicated by asterisks. PD15 – 15^th percentile of lung density