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Table 2 Multivariate logistic analysis of breast cancer-related factors compared with benign breast disease control

From: Family history and risk of ductal carcinoma in situ and triple negative breast cancer in a Han Chinese population: a case–control study

Variable

OR

95% CI

P

Age at diagnosis, years

≤30

Reference

  

31 to 40

6.14

2.58 to 14.64

<0.001

41 to 50

10.31

4.34 to 24.51

<0.001

51 to 60

14.46

6.02 to 34.69

<0.001

61 to 70

16.08

6.41 to 40.33

<0.001

71 to 80

31.12

11.69 to 82.89

<0.001

≥81

38.86

6.30 to 239.57

<0.001

Age at menarche, years

≤13

Reference

  

14 to 16

0.83

0.63 to 1.09

0.172

≥17

1.21

0.84 to 1.74

0.309

Childbearing

0

Reference

  

1

1.24

0.71 to 2.16

0.448

2

1.52

0.84 to 2.76

0.170

≥3

1.47

0.75 to 2.89

0.226

Family history

No

Reference

  

Yes

2.11

1.26 to 3.52

0.004

  1. CI, confidence interval; OR, odds ratio.