TABLE 2.

Univariate and multivariate Cox regression analyses of factors associated with time to viral culture negativity

Characteristic	Univariate model			Multivariate model
	HR	95% CI	P value	HR	95% CI	P value
Age >40 yrs	0.75	0.38–1.49	0.410
Female	2.30	0.87–6.13	0.095	1.39	0.48–4.02	0.545
BMI >27.5 (kg/m2)	0.97	0.47–1.99	0.934
Pneumonia	0.60	0.28–1.31	0.202
Favipiravir	1.17	0.60–2.29	0.652
Steroid	0.28	0.09–0.83	0.022	0.30	0.09–0.98	0.047
2-dose vaccination	1.48	0.71–3.07	0.291
Virus strain
Alpha	0.36	0.11–1.16	0.088	0.47	0.14–1.57	0.219
Delta	0.65	0.22–1.95	0.445	0.81	0.27–2.43	0.707