Table 4. The intensity of the absorption bands in the IR spectra of saliva of patients with breast cancer and the control group.

Wavelength, cm-1

Control (female), n=58

Breast Cancer, n=50

p-value

Δ, %

970

17.9 [12.1; 23.8]

9.3 [6.8; 17.5]

0.0001*

-48.1

1082

52.3 [42.9; 63.9]

31.7 [22.7; 42.9]

0.0000*

-39.4

1180

32.4 [25.3; 38.4]

20.7 [13.9; 29.6]

0.0000*

-36.1

1400

44.6 [36.8; 56.4]

44.8 [28.9; 60.7]

0.4957

+0.4

1460

31.2 [25.9; 37.5]

24.2 [15.7; 31.2]

0.0013*

-22.4

1735

13.8 [9.5; 18.9]

9.6 [7.6; 13.3]

0.0009*

-30.4

2850

38.0 [28.6; 47.9]

40.8 [30.7; 54.9]

0.2009

+7.4

2875

39.6 [29.9; 50.4]

41.9 [31.3; 58.1]

0.2492

+5.8

2930

49.2 [38.6; 60.6]

52.9 [36.5; 69.3]

0.3823

+7.5

2950

49.9 [38.8; 62.3]

52.8 [36.3; 70.4]

0.4704

+5.8

I2950/2875

1.24 [1.21; 1.27]

1.20 [1.17; 1.23]

0.0000*

-3.5

I1400/1460

1.45 [1.26; 1.77]

1.79 [1.59; 1.99]

0.0000*

+23.1

I2850/1735

2.71 [1.86; 3.85]

4.52 [2.79; 6.03]

0.0000*

+66.8

Note. *– the differences are statistically significant, р ˂ 0.05