Table 2:

Robust LASSO Logistic Regressions

Model	Main Effects	Interaction-Term Clusters	Hierarchical Clustering
Average Area under the Receiver Operating Curve	0.78	0.81	0.79
Variance of Area under the Receiver Operating Curve	0.0019	0.0027	0.0029
Average Sensitivity	0.64	0.67	0.64
Average Specificity	0.82	0.85	0.86
Total number of possible predictors	47	17,343	23
Number of robust predictors	11	23	10
Predictors	Coefficients of LASSO Regression Models
	Main Effect	Interaction-Term Clusters	Hierarchical Clustering
Intercept	−2.21	−1.77	−2.03
Cough	0.43
Chills	0.37
Headaches	1.06		0.61
Joint pain	0.35
Chest pain	0.69
Runny nose			−0.55
Loss of smell	0.17
Loss of taste	0.38		0.77
Loss of appetite	0.27
Difficulty breathing	0.20
Muscle aches			0.22
History of respiratory symptoms			0.24
Age 30+	−0.26		−0.55
White	0.11		0.38
Female			0.33
Cough, fever, runny nose & headaches			1.57
Chest pain, difficulty breathing, wheezing, chills & shortness of breath			2.22
Fever & age 30+		−0.44
Muscle aches & headaches		0.69
Numbness & non-Hispanic/ Latino		−0.57
Runny nose & non-Hispanic/ Latino		−0.91
Cough, fever & runny nose		0.54
Cough, loss of taste & fever		0.32
Headaches, cough & runny nose		0.59
Headaches, cough & White		0.64
Headaches, chills & White		0.63
Sore throat, fever & runny nose		0.47
Fatigue, chest pain & White		1.56
Cough, loss of taste & runny nose		0.06
Sore throat, chills & female		−0.21
Loss of appetite, cough & White		0.47
Loss of smell, cough & loss of taste		0.91
Cough, age 18 to 29 & female		0.36
Fatigue, cough & non-Hispanic/Latino		−0.26
Pinkeye, headaches & non-Hispanic/Latino		0.71
History of respiratory symptoms, cough & runny nose		0.20
History of respiratory symptoms, cough & White		0.60
History of respiratory symptoms, muscle aches & cough		−0.63
Headaches, loss of taste & non-Hispanic/Latino		0.39
History of respiratory symptoms, muscle aches & age 30+		−0.86