Table 1 Clinical characteristics of participants

Age, years

8.15 ± 1.17

8.21 ± 1.20

0.259

BA-CA, years

1.89 ± 1.62

1.40 ± 1.03

0.243

Weight, kg

29.64 ± 5.74

28.41 ± 5.59

0.023

Height, cm

130.24 ± 7.79

132.09 ± 7.28

0.010

BMI, kg/m²

16.86 ± 2.09

16.62 ± 1.95

0.204

Tanner stage (breast)

2.56 ± 0.71

2.19 ± 0.56

< 0.001

Tanner stage (pubic hair)

1.29 ± 0.44

1.15 ± 0.43

0.824

Baseline LH, IU/L

1.04 ± 1.54

0.34 ± 0.64

< 0.001

Baseline FSH, IU/L

3.86 ± 2.48

2.86 ± 1.76

< 0.001

Baseline LH/FSH ratio

0.39 ± 1.42

0.10 ± 0.12

0.001

Baseline Estradiol, pg/mL

28.61 ± 17.80

24.84 ± 13.70

0.011

PRL, ng/mL

11.10 ± 5.74

10.83 ± 6.02

0.618

Pituitary

Height, mm

5.18 ± 1.11

4.93 ± 1.16

0.080

Volume, mm³

356.52 ± 113.41

343.92 ± 85.28

0.178

Shape grade

2.02 ± 0.60

1.96 ± 0.58

0.256

Uterine

Length, mm

22.50 ± 5.51

19.85 ± 4.35

< 0.001

Anteroposterior diameter, mm

14.88 ± 5.55

13.20 ± 4.95

< 0.001

Transverse diameter, mm

11.06 ± 4.60

8.81 ± 3.39

< 0.001

Uterus volume, mL

2.45 ± 2.95

1.48 ± 1.64

< 0.001

Cervical

Anteroposterior diameter, mm

11.09 ± 3.25

10.57 ± 3.04

0.085

FCR

1.34 ± 0.23

1.24 ± 0.23

< 0.001

Presence of endometrium, n (%)

180 (68.44)

101 (52.60)

< 0.001

Ovary

Length, mm

24.87 ± 4.33

23.91 ± 3.38

0.215

Width, mm

12.01 ± 2.75

11.50 ± 2.31

0.286

Height, mm

14.09 ± 3.32

14.37 ± 4.21

0.653

Average volume, mL

2.31 ± 1.09

2.03 ± 0.94

0.004