Table 5 Univariate and multivariate analysis of risk factors for postoperative complication

 Right (Ref.)

0.039

0.020

 Left

0.709 (0.400–1.256)

0.238

0.659 (0.366–1.185)

0.163

 Bilateral

2.151 (0.943–4.907)

0.069

2.331 (0.989–5.490)

0.053

 Invasive cancer (Ref.)

0.939

0.921

 DCIS

0.894 (0.444–1.801)

0.754

1.188 (0.508–2.780)

0.691

 Other

0.866 (0.203–3.698)

0.846

1.079 (0.241–4.842)

0.921

 Yes

2.499 (1.469–4.250)

0.001

1.709 (0.946–3.085)

0.076

 No (Ref.)

 N0 (Ref.)

< 0.001

< 0.001

 N1

2.598 (1.417–4.766)

0.002

2.203 (1.163–4.172)

0.015

 N2

7.758 (3.379–17.808)

< 0.001

6.823 (2.845–16.361)

< 0.001

 N3

8.752 (2.677–28.612)

< 0.001

6.331 (1.831–21.886)

0.004

 0 & NRT (Ref.)

0.025

0.179

 I

1.443 (0.640–3.255)

0.377

1.232 (0.461–3.288)

0.677

 II

1.221 (0.513–2.905)

0.652

0.054 (0.170–1.713)

0.295

 III

3.769 (1.428–9.947)

0.007

0.564 (0.145–2.200)

0.410

 SLNB (Ref.)

 ALND

3.144 (1.826–5.414)

< 0.001

1.450 (0.674–3.123)

0.342

 Yes

2.731 (1.564–4.769)

< 0.001

1.101 (0.468–2.589)

0.825

 No (Ref.)

 No (Ref.)

0.067

0.775

 NAC

1.681 (0.564–5.015)

0.351

0.625 (0.168–2.328)

0.483

 Adjuvant CTx.

1.904 (1.101–3.295)

0.021

0.839 (0.384–1.833)

0.660