Table 1.

Characteristics of patients with ARDS caused by SARS-CoV-2 or influenza A/B. For laboratory data, maximum values are shown. p value reported in bold if difference is significant (p < 0.05). Data are given as mean ± standard deviation or number of patients (percent of all patients in group). ^aStudent’s t test; ^bWelch t test, ^cchi-square test; ^dFisher’s exact test

	Influenza (N = 16)	COVID-19 (N = 20)	p
Age	54.31 ± 12.36	65.48 ± 10.99	0.007a
Female	5 (31.3%)	4 (20.0%)	0.470d
ICU stay (days)	19.85 ± 12.09	21.05 ± 11.77	0.765a
Death	0 (0%)	2 (10.0%)	0.492d
Severe ARDS	11 (68.8%)	9 (45.0%)	0.154c
Days of invasive ventilation	18.28 ± 15.61	15.47 ± 10.34	0.522a
TISS 10	16.63 ± 5.73	15.25 ± 6.77	0.521a
SAPS 2	40.38 ± 9.88	44.70 ± 11.13	0.232
Noradrenalin > 1 mg/h	8 (50.0%)	10 (50%)	1.000
Renal replacement therapy	4 (25.0%)	6 (30.0%)	1.000
Lactat mmol/l	3.35 ± 1.82	3.07 ± 2.23	0.369
CRP mg/dl	302.99 ± 96.89	257.34 ± 84.46	0.140
Procalcitonin ng/ml	59.22 ± 106.43	17.19 ± 33.46	0.159
Delirium	12 (75.0%)	13 (65.0%)	0.718
Delirium duration (days)	2.83 ± 2.44	5.08 ± 4.29	0.126
NuDesc score at maximum	3.67 ± 1.78	5.15 ± 2.58	0.109
Delirium onset after extubation (days)	0.80 ± 1.55	0.50 ± 1.08	0.622