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Table 3 Demographic and Clinical Characteristics of the Women at the Time of Entry into the Study (n = 1200)

From: Monofrequency electrical impedance mammography (EIM) diagnostic system in breast cancer screening

 

Group 1 n = 196

Group 2 n = 319

Group 3 n = 393

Group 4 n = 292

p

Age (years)

29.82 ± 3.92

41.60 ± 2.66

50.22 ± 2.74

62.5 ± 4.75

P = 0.001

Electrical Conductivity Index

0.35 ± 0.11

0.41 ± 0.11

0.49 ± 0.12

0.54 ± 0.10

P = 0.001

BMI kg/m2

26.02 ± 5.78

28.94 ± 5.81

29.12 ± 5.70

29.37 ± 6.06

P = 0.001

% Fat

33.79 ± 7.67

37.41 ± 7.38

38.09 ± 6.76

38.40 ± 7.89

P = 0.001

Menopausal status

Postmenopausal (%)

6.12

12.5

58.77

96.23

P = 0.001

Hormone use (%)

46.93

35.42

34.86

34.24

P = 0.001

Smoking (%)

17.85

11.91

9.41

7.87

P = 0.001

Alcoholism (%)

15.81

11.91

7.88

5.13

P = 0.001

Previous history of breast cancer (%)

0

0

0

0

ns

Family history One first-degree relative with breast cancer (%)

6.63

8.46

8.90

10.27

P = 0.001

Palpable lesion(%)

19.38

22.88

18.06

13.01

P = 0.001

  1. The data are shown as the mean ± SD. The Mann-Whitney test was used to determine the differences