Table 4.

Factors associated with occurrence of AF in pneumonia related to COVID-19 infection

Variable	Univariate analysis		Multivariate analysis
	OR (95%CI)	P	OR (95%CI)	P
LAScd (for each 1% increase)	1.27 [1.10–1.47]	0.001	1.24 [1.04–1.48]	0.018
LASr (for each 1% increase)	0.89 [0.83–0.95]	0.002	NS
SOFA cv > 1	6.4 [1.96–20.9]	0.002	5.56 [1.41–22.11]	0.015
PEEP	0.86 [0.68–1.09]	0.86	NR	–

Bold indicates P < 0.05

The multivariable model showed a good calibration as assessed by the Hosmer and Lemeshow goodness of fit test [p = 0.98] and a fair discrimination as assessed by the receiver operating characteristics curve [area under the curve (AUC) 0.89; 95% CI 0.80–0.97; p < 0.001] (Fig. 4)

CI confidence interval, CV cardiovascular, LAScd left atrial strain during conduit phase, SOFA sequential organ failure assessment, PEEP positive end-expiratory pressure. NR not retained in the final model, NS not significant in the final model