Characteristic	Univariate analysis		Multivariate analysis
	Odds ratio (95%CI)	P‐value	Odds ratio (95%CI)	P‐value
ABO group “Non‐O”	3.2 (0.925–11.28)	0.066	4.86 (1.26–18.65)	0.02
Volume of mediastinal lymphadenopathy ≥250 ml	6.3 (2.49–16.1)	0.0001	4.38 (1.59–12.1)	0.004
ICU hospitalization ≥2 days	3.6 (1.4–9.8)	0.01	2.92 (0.98–8.68)	0.053
Age ≥12 years	8.8 (2.5–30.8)	0.001	6.7 (1.8–24.9)	0.004