Table 1.

Patient Characteristics and ACE2 Expression

		β Value	Standard Error	p Value
Thoracic surgery cohort	Age	0.0014	0.0086	0.8700
	BMI	−0.0199	0.0127	0.1193
	Smoking pack years	0.0081	0.0025	0.0015∗∗
	Race: Caucasian = 0; not Caucasian = 1	0.1910	0.1663	0.2527
	Sex: female = 0, male = 1	0.3335	0.1338	0.0138∗
Tracheal epithelium cohort	Age	−0.0027	0.0080	0.7364
	Smoking status: never smoker = 0; current smoker = 1	0.5638	0.1269	7 × 10−5∗∗∗
	Race: Caucasian = 0; not Caucasian = 1	0.1252	0.1331	0.3527
	Sex: female = 0; male = 1	0.2538	0.1328	0.0632

Multivariate regression between various patient characteristics, smoking status, and ACE2 expression. The thoracic surgery cohort is from GSE76925 and the tracheal epithelium cohort is from GSE13933. ^∗p < 0.05, ^∗∗p < 0.005, ^∗∗∗p < 0.0005.