Table 4.

Clinical characteristics and laboratory profiles of hospitalized patients with COVID-19 with confirmed HIT and patients with negative confirmatory tests

VariablesPatients with confirmed HIT (N = 19)Patients with negative confirmatory tests (N = 26)
Age (y) 62.0 (50.0, 64.0)* 62 (50, 68.75)* 
Sex (male; female) 14 (74%); 5 (26%) 21 (81%); 5 (19%) 
Type of heparins (UFH; LMWH) 17 (63%); 10 (37%) 15 (43%), 16 (46%) [4 N/A (11%)] 
Intensity of anticoagulants (prophylactic; therapeutic) 5 (26.3%); 13 (68.4%) [1 N/A (5.3%)] 9 (34.6%%); 9 (34.6%); [8 N/A (30.8%)] 
Duration of heparin to HIT diagnosis (d) 13.5 (10.75, 16.25)* 11 (6, 21)* 
Initial platelet counts (×109/L) 223 (160.5, 297)* 209 (145.5, 247.5)* 
Nadir platelet counts (×109/L) 56 (37, 73)* 59 (37.5, 91.75)* 
Thrombosis after heparin administration 12 (63%) 16 (61.5%) 
4T score 5.5 (4, 6)* 5 (4, 6)* 
VariablesPatients with confirmed HIT (N = 19)Patients with negative confirmatory tests (N = 26)
Age (y) 62.0 (50.0, 64.0)* 62 (50, 68.75)* 
Sex (male; female) 14 (74%); 5 (26%) 21 (81%); 5 (19%) 
Type of heparins (UFH; LMWH) 17 (63%); 10 (37%) 15 (43%), 16 (46%) [4 N/A (11%)] 
Intensity of anticoagulants (prophylactic; therapeutic) 5 (26.3%); 13 (68.4%) [1 N/A (5.3%)] 9 (34.6%%); 9 (34.6%); [8 N/A (30.8%)] 
Duration of heparin to HIT diagnosis (d) 13.5 (10.75, 16.25)* 11 (6, 21)* 
Initial platelet counts (×109/L) 223 (160.5, 297)* 209 (145.5, 247.5)* 
Nadir platelet counts (×109/L) 56 (37, 73)* 59 (37.5, 91.75)* 
Thrombosis after heparin administration 12 (63%) 16 (61.5%) 
4T score 5.5 (4, 6)* 5 (4, 6)* 

N/A, not available.

*

Median (interquartile range).

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