Table 3.

Incidence and location of pulmonary embolisms in ICU patients stratified by ancestral strain and variants (n = 163).

	Total	Ancestral strain	Alpha variant	Delta variant	Omicron variant	P value
Frequency of pulmonary embolism	27/163 (17%)	16/102 (16%)	1/7 (14%)	7/31 (23%)	3/23 (13%)	.84*
Most proximal anatomical location
Main/lobar	8/27 (30%)	6/16 (37.5%)	1/1 (100%)	0 (0%)	1/3 (33%)	.16*
Segmental	14/27 (52%)	6/16 (37.5%)	0/1 (0%)	6/7 (86%)	2/3 (67%)
Subsegmental	5/27 (18%)	4/16 (25%)	0/1 (0%)	1/7 (14%)	0/3 (0%)

ICU = intensive care unit.

^*Fisher exact test was performed among ancestral strain, Alpha variant, Delta variant, and Omicron variant.