Table 2. Unadjusted and adjusted 90-day... | American Society of Hematology

Table 2.

Unadjusted and adjusted 90-day post hospital VTE incidence by SARS-CoV-2 positivity and study period (n=63 920)

SARS-CoV-2 period	SARS-CoV-2 (−) n=50 393	COVID-19 Vaccine breakthrough n=3443		COVID-19 Unvaccinated n=10 084
SARS-CoV-2 period	(Reference)	Unadjusted	Adjusted HR (95% CI)	Unadjusted	Adjusted HR (95% CI)
Pre-Delta n=25 415	0.7% (144/20 644)	3.0% (1/33)	2.9 (0.4-20.9)∗	1.3% (60/4738)	2.1 (1.6-2.8)†
Delta n=19 296	0.7% (100/14 531)	1.7% (17/1029)	2.2 (1.3-3.6)‡	2.1% (79/3736)	4.1 (3.1-5.3)§
Omicron n=19 209	0.7% (99/15 218)	0.9% (22/2381)	1.5 (1.0-2.3)‖	1.3% (21/1610)	2.2 (1.4-3.4)¶

SARS-CoV-2 period	SARS-CoV-2 (−) n=50 393	COVID-19 Vaccine breakthrough n=3443		COVID-19 Unvaccinated n=10 084
SARS-CoV-2 period	(Reference)	Unadjusted	Adjusted HR (95% CI)	Unadjusted	Adjusted HR (95% CI)
Pre-Delta n=25 415	0.7% (144/20 644)	3.0% (1/33)	2.9 (0.4-20.9)∗	1.3% (60/4738)	2.1 (1.6-2.8)†
Delta n=19 296	0.7% (100/14 531)	1.7% (17/1029)	2.2 (1.3-3.6)‡	2.1% (79/3736)	4.1 (3.1-5.3)§
Omicron n=19 209	0.7% (99/15 218)	0.9% (22/2381)	1.5 (1.0-2.3)‖	1.3% (21/1610)	2.2 (1.4-3.4)¶

HRs with 95% CI and P-values presented for Cox regression of 90-day post hospital VTE in COVID-19 subgroups relative to SARS-CoV-2 negative patients.

P = .287.

P < .001.

P = .002.

P < .001.

P = .083.

P < .001.