Table 3.

Crude odds and adjusted odds ratios and 95% confidence intervals of risk factors for COVID-19.

Variables		Crude Model		Adjusted Model 1		Adjusted Model 2
		Odds Ratio (95% CI)	p Value	Odds Ratio (95% CI)	p Value	Odds Ratio (95% CI)	p Value
Symptom	Headache	3.48 (1.20–10.10)	0.022	3.54 (0.93–13.48)	0.064	3.31 (0.98–11.20)	0.054
	Sore throat	1.46 (0.54–3.95)	0.452
	Dysgeusia	10.58 (3.25–34.47)	<0.001	0.44 (0.05–4.19)	0.478
	Anosmia	32.99 (10.34–105.22)	<0.001	29.3 (4.17–205.61)	<0.001	25.94 (7.15–94.14)	<0.001
	Nasal discharge	2.14 (0.72–6.30)	0.169
	Cough	3.21 (1.20–8.58)	0.02	1.90 (0.47–7.67)	0.367
	Sputum production	4.03 (1.50–10.86)	0.006	2.67 (0.70–10.19)	0.15	3.32 (1.01–10.90)	0.048
	Nausea/vomiting	0.68 (0.09–5.29)	0.710
	Diarrhea	0.63 (0.14–2.82)	0.545
	Stomachache	0.52 (0.07–4.01)	0.528
	Fatigue	1.23 (0.46–3.26)	0.410
	Shortness of breath	1.01 (0.22–4.58)	0.01
	Joint pain	1.39 (0.44–4.42)	0.56
	Myaglia	1.65 (0.52–5.24)	0.398
	Lack of appetite	0.65 (0.18–2.32)	0.507
Visited place	Close contact to patients with COVID-19	1.70 (0.37–7.84)	0.680
	Host club and/or hostess club	N/A	N/A
	Nightclub	9.01 (1.61–50.31)	0.012	0.86 (0.02–41.13)	0.938
	Pachinko parlor	2.62 (0.31–22.21)	0.880
	Karaoke	7.49 (1.39–40.25)	0.019	0.62 (0.01–32.21)	0.814
	Izakaya or Bar	6.08 (1.97–18.80)	0.002	7.06 (1.45–34.36)	0.016	4.23 (0.99–18.03)	0.051
	Amusement arcade	N/A	N/A
	Movie theater	N/A	N/A
	Theater	N/A	N/A
	Live music club	N/A	N/A
	Amusement park	N/A	N/A
	Hospital	1.01 (0.32–3.19)	0.984
	Dental clinic	N/A	N/A
	Beauty salon	0.76 (0.10–5.98)	0.796
	Elderly day care center	2.08 (0.25–17.27)	0.497
	Sports gym	N/A	N/A
	Sports club	2.32 (0.28–19.43)	0.438
	Church	N/A	N/A
	Welfare facility	N/A	N/A
	Train	3.91 (1.19–12.89)	0.025	0.39 (0.029–5.24)	0.476
	Taxi	2.62 (0.31–22.210	0.378
	Other place people gathered	2.27 (0.71–7.28)	0.169
	Outside the prefecture	1.37 (0.43–4.33)	0.595
	AUC (95% CI)			0.861 (0.75–0.97)		0.870 (0.77–0.97)

CI, Confidence interval.