Table 2.

Multivariable linear regression analysis between the QTc-AT (Bazett and Fredericia) and clinical variables.

	Model 1 (Bazett)			Model 2 (Fredericia)
	β-coefficient	CI 95%	P value	β-coefficient	CI 95%	P value
Age (year)	3047	0,092 - 0,428	0,003	2190	0,018–0,346	0,030
Gender (female)	2465	1401 - 12,654	0,015	1609	-1006–9877	0,109
QTc-B	10,455	0,503 - 0,737	<0,001	9764	0,486–0,732	<0,001
Potassium	-2009	−13,067 - −0,117	0,046	−1828	−12,046–0,461	0,069
SIRS criteria ≥2	2189	0,730 - 14,107	0,030	2268	0,934–13,483	0,025
Hydroxychloroquine	2687	2599 - 16,976	0,008	2120	0,514–14,398	0,035
Favipiravir	0,180	−6435 - 7724	0,858	0,111	−6450–7221	0,911
Congestive heart failure	−0,860	−30,961–12,163	0,391	0,128	−19,495–22,194	0,898
Myocardial injury	0,676	−8622–17,598	0,500	−0,701	−17,252–8207	0,484
Loop diuretic	−0,403	−23,927–15,079	0,688	−0,064	−19,828–18,589	0,949
Beta-blocker	1119	−4167–15,079	0,265	0,155	−8520–9969	0,877
Calcium	−1597	−10,811–1141	0,112	−0,843	−8265–3319	0,401

QTc-B: QTC baseline; CI: Confidence Interval; QTcAT: QTc after treatment; SIRS: Systemic Inflammatory Response Syndrome.