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Table 7 Comparisons of transvaginal 2D SWE outcomes between patients in proliferative phase and secretory phase, shown as mean ± SD, median (25th -75th percentile)

From: Evaluation of the stiffness of normal cervix and its change with different factors using transvaginal two-dimensional shear wave elastography under strict quality control

Menstrual cycle

Internal cervical os of midsagittal planes

External cervical os of midsagittal planes

Emean

Emax

Emin*

Emean*

Emax

Emin*

proliferative phase (n = 78)

44.80 ± 6.79

45.25 (42.21–49.71)

50.12 ± 6.80

50.85 (46.80-54.49)

38.82 ± 7.73

40.13 (35.13–43.69)

21.23 ± 9.56

18.90 (14.38–27.02)

28.02 ± 9.18

27.80 (21.65–34.05)

14.61 ± 9.19

12.50 (7.73–19.55)

secretory phase (n = 52)

45.64 ± 6.97

46.22 (41.99–50.46)

50.92 ± 6.65

50.56 (47.04–55.44)

39.61 ± 7.20

41.22 (35.66–44.60)

23.23 ± 8.74

24.03 (15.24–29.61)

30.41 ± 9.51

31.75 (22.90-38.01)

15.55 ± 7.34

15.13 (9.32–21.48)

t/Z

0.678

0.661

0.891

1.404

1.431

1.290

P

0.499

0.510

0.373

0.160

0.155

0.197

  1. * means non-normal distribution
  2. 2D SWE: two-dimensional shear wave elastography; SD: standard deviation; Emean: mean elasticity; Emax: maximal elasticity; Emin: minimal elasticity