. 2021 Nov 9;5(21):4521–4534. doi: 10.1182/bloodadvances.2021005314

Table 4.

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

Variables	Patients 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).