Table 1 Characteristics of recruited patients in the study

Case number, n

57

39

Age, years

41.30 ± 4.86

39.63 ± 6.29

0.217

BMI, kg/m²

24.80(21.67–28.19)

24.47(21.37–25.34)

0.122

Dysmenorrhea

 < 0.001

 None/Mild

1

38

 Moderate

9

1

 Severe

47

0

NRS score for dysmenorrhea

7(8–9)

0

 < 0.001

Amount of menses

 Light

3

8

 < 0.001

 Moderate

11

25

 Heavy

43

6

Uterine size, cm³

280.22(192.05–402.39)

91.27(80.43–119.61)

 < 0.001

stain ratio

2.04(1.71–2.25)

1.02(0.96–1.09)

 < 0.001