TABLE 2.

Demographics of patients according to development of postoperative hematoma

Characteristic	No hematoma	Hematoma	p
No. of patients	4492	22
Age (years)	54 ± 0.2	55 ± 4.2	0.44
Patient gender
Female	99.5 %	0.5 %	0.61
Male	99.4 %	0.6 %
Target organ
Thyroid	2375 (99.2 %)	20 (0.8 %)	<0.001
Parathyroid	2117 (99.9 %)	2 (0.1 %)
Extent of operation
Unilateral	2322 (99.9 %)	3 (0.1 %)	0.002
Bilateral	2049 (99.1 %)	18 (0.9 %)
Extensive	121 (99.2 %)	1 (0.8 %)
Reoperative neck	496 (99.4 %)	3 (0.6 %)	0.73
Antiplatelet use
None	3367 (99.5 %)	16 (0.5 %)	0.045
<325 mg aspirin	669 (99.9 %)	1 (0.1 %)
≥325 mg aspirin	369 (99.2 %)	3 (0.8 %)
Clopidogrel	87 (97.8 %)	2 (2.2 %)
Anticoagulant use
None	4331 (99.6 %)	16 (0.4 %)	<0.001
Oral	136 (97.8 %)	3 (2.2 %)
Injectable	25 (89.3 %)	3 (10.7 %)
Use of either medication type
None	3251 (99.7 %)	11 (0.3 %)	0.033
One	1199 (99.2 %)	10 (0.8 %)
Both	42 (97.7 %)	1 (2.3 %)

Data are expressed as mean ± SEM or as n (%)