Table 3.

Anticoagulation treatment and respiratory support^a during hospitalization.

	No oxygen		Oxygen		IMV/ECMO		Total number
Whole cohort	494	28.30%	943	54%	310	17.70%	1747
No treatment	479	34.7%	771	55.9%	130	9.4%	1380
Treatment	15	4.1%	172	46.9%	180	49.0%	367
No steroid therapy	459	37.6%	621	50.8%	142	11.6%	1222
No treatment	452	41.7%	555	51.2%	77	7.1%	1084
Treatment	7	5.1%	66	47.8%	65	47.1%	138
Steroid therapy	35	6.7%	322	61.3%	168	32.0%	525
No treatment	27	9.1%	216	73.0%	53	17.9%	296
Treatment	8	3.5%	106	46.3%	115	50.2%	229

IMV/ECMO, invasive mechanical ventilation/extracorporeal membrane oxygenation.

^aDefinitions are as reported previously (Matsunaga et al., 2020).