Table 1.

Distribution of patient characteristics

Parameter	All patients	Male	Female
Age	67.85 IQR: 14.73	67.2 IQR: 15.6	70.6 IQR: 15.5
n	30	17	13
Intensive care treatment	13	9	4
Mechanical ventilation	7	6	1
Overall lung volume (dl)	27.10 IQR: 12.54	26.87 IQR: 21.18	27.34 IQR: 6.46
Low-density volume (dl)	4.13 IQR: 5.36	4.39 IQR: 5.58	4.09 IQR: 4.01
Low-density percentage	0.16 IQR: 0.13	0.16 IQR: 0.14	0.16 IQR: 0.12
Medium-density volume (dl)	22.65 IQR: 12.91	22.58 IQR: 15.38	22.72 IQR: 9.72
High-density volume (dl)	10.23 IQR: 5.39	10.84 IQR: 4.99	6.77 IQR: 6.02
Low-density index	0.16 IQR: 0.13	0.16 IQR: 0.14	0.16 IQR: 0.12
PD15 (g/l)	77.0 IQR: 35.5	77 IQR: 34	76 IQR: 35

PD15 – 15^th percentile of lung density