TABLE 3.

Multivariate analysis of factors independently associated with postoperative hematoma formation

Characteristic	Odds ratio (95 % confidence interval)	p
Female gender	0.92 (0.34–2.47)	0.86
Thyroid procedure	7.92 (1.78–35.16)	0.007
Extent of procedure
Bilateral	4.92 (1.42–17.00)	0.012
Extensive	4.27 (0.43–42.28)	0.21
Antiplatelet use
<325 mg aspirin	0.43 (0.06–3.38)	0.43
≥325 mg aspirin	2.75 (0.76–9.92)	0.12
Clopidogrel	5.60 (1.15–27.13)	0.033
Anticoagulant use
Oral	7.51 (2.00–28.24)	0.003
Injectable	29.45 (7.46–116.37)	<0.001