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Table 2 Risk factors for seroma formation derived from the multivariate logistic regression analysis

From: Seroma formation after surgery for breast cancer

  β (SE) Wald P OR (95% CI)
Age (years)     
<40 - -   1.00 (ref.)
40–49 0.68 (0.49) 1.92 0.16 1.99 (0.75–5.25)
>50 0.75 (0.48) 2.44 0.11 2.12 (0.82–5.44)
Tumor size (cm)     
<2 - -   1.00 (ref.)
2–5 0.38 (0.44) 0.74 0.38 1.46 (0.61–3.49)
>5 0.08 (0.52) 0.03 0.88 1.09 (0.39–3.00)
Nodal involvement (n = 152)     
No - -   1.00 (ref.)
Yes 0.35 (0.43) 0.66 0.41 1.42 (0.60–3.35)
Surgical procedure     
Breast conservation - -   1.00 (ref.)
Modified radical mastectomy 1.04 (0.52) 3.97 0.04 2.83 (1.01–7.90)
Surgical instrument     
Scalpel - -   1.00 (ref.)
Cautery 0.60 (0.51) 1.36 0.24 1.83 (0.66–5.07)
Neoadjuvant chemotherapy     
No - -   1.00 (ref.)
Yes 0.33 (0.55) 0.37 0.54 1.40 (0.47–4.13)
Pressure garment     
Yes - -   1.00 (ref.)
No 0.51 90.46) 1.28 0.26 1.67 (0.67–4.11)
Axillary drainage time (days/n= 152)     
>10 - -   1.00 (ref.)
5–10 0.13 (0.59) 0.04 0.76 1.17 (0.41–3.32)
<5 0.16 (0.53) 0.09 0.82 1.14 (0.35–3.66)