Table 3. Multivariable analysis of influence factors associated with hematoma occurrence (n=293).

Variables	OR (95% CI)	P
Nodule size, mm		<0.001
<23.4	1
≥23.4	5.775 (2.752–12.121)
Number of nodules		0.011
Single	1
≥2	3.205 (1.311–7.834)
Efficacy time of bandage (h)		0.003
12–24	1
48–72	5.257 (1.792–15.421)
Menstrual period		0.191
No	1
Yes	3.056
Breast shape		0.341
Small and compact	1
Large and loose	2.301

CI, confidence interval; OR, odds ratio.