Table 3 Association between nipple-areola complex ischemia necrosis and risk factors by the logistic regression (n = 441)

Odds ratio

95% CI

p-value

Odds ratio

95% CI

p-value

 Upper outer oblique

1

-

-

1

-

-

 Peri-areolar

3.81

1.42–10.98

< 0.01

1.71

0.80–3.67

0.17

 Single axillary

1.03

0.36–2.92

0.96

0.47

0.22–1.03

0.06

 Infra-mammary + axillary

-

-

0.99

-

-

0.99

Age

1.04

1.01–1.07

0.01

1.02

1.00–1.05

0.10

Specimen

 < 180

1

-

-

1

-

-

 180–320

1.63

0.44–5.95

0.46

2.22

0.63–7.89

0.22

 320–450

2.89

0.78–10.68

0.11

3.74

1.04–13.44

0.04

 > 450

4.46

1.23–16.24

0.02

6.99

1.98–24.70

< 0.01

Odds ratio

95% CI

p-value

Odds ratio

95% CI

p-value

 Upper outer oblique

1

-

-

1

-

-

 Peri-areolar

5.33

1.81–15.67

< 0.01

2.30

1.02–5.17

0.04

 Single axillary

1.22

0.41–3.60

0.72

0.56

0.25–1.26

0.16

 Infra-mammary + axillary

-

-

0.99

Age

1.04

1.01–1.08

0.02

1.02

0.99–1.05

0.21

 < 180

1

-

-

1

-

-

 180–320

1.36

0.36–5.22

0.65

2.15

0.59–7.86

0.25

 320–450

2.28

0.58–8.89

0.24

3.45

0.92–12.910

0.07

 > 450

4.60

1.20–17.71

0.03

6.99

1.91–25.64

< 0.01