TABLE 2.

Average values (%) of the study variables per saturation level. Gender is expressed as the percentage of women. For better interpretation, image diagnostic variables are expressed in terms of deviation from the average healthy patient (hence, the 0% values in the adequate level).

	Saturation (%)	Age	Sex (%)	Pulmonary air density	Lung area	Opacity (%)
Adequate	96.0	59.6	52.1	0.0%	0.0%	0.0
Medium	92.7	64.9	32.1	−2.7%	−3.6%	18.8
Low	87.3	69.0	30.9	−13.2%	−5.9%	72.2
Extreme	77.8	78.3	25.0	−19.8%	−15.4%	89.9