Table 2 Intra-group and inter-group comparison of FF values and S values.

FF_LL

3.10(2.88,3.78)

6.08 ± 0.82

6.85 ± 0.68

9.12(7.67,11.40)

22.347

0.000

FF_RL

2.05(1.69,2.65)

5.44 ± 1.00

5.82 ± 0.72

8.21(6.67,10.45)

22.166

0.000

FF_WL

2.15(2.14,3.05)

5.55 ± 0.93

6.37 ± 0.72

8.46(6.93,10.71)

22.246

0.000

F

0.774

7.284

6.439

4.442

–

–

P

0.701

0.001

0.004

0.019

–

–

FF_Sp

0.53(0.44,0.67)

1.13 ± 0.42

2.60 ± 0.46

0.95(0.78,1.23)

9.723

0.000

FF_PH

6.64 ± 0.52

7.75 ± 0.85

12.02 ± 1.04

14.17 ± 0.79

19.179

0.000

FF_PB

6.02 ± 0.35

7.01 ± 0.72

10.09 ± 0.76

12.86 ± 0.89

14.032

0.000

FF_PT

6.56 ± 0.42

7.68 ± 0.55

10.74 ± 0.79

13.24 ± 1.15

15.470

0.000

F

0.647

3.427

3.966

3.723

–

–

P

0.526

0.043

0.031

0.037

–

–

FF_LK

6.44 ± 0.25

6.01 ± 0.42

5.77 ± 0.34

7.27 ± 1.07

0.713

0.546

FF_RK

6.14 ± 0.29

6.07 ± 0.38

5.70 ± 0.40

7.01 ± 1.02

t

1.638

 − 0.848

0.298

1.279

–

–

P

0.110

0.408

0.768

0.207

–

–

FF_L3

39.29 ± 1.75

46.21 ± 1.80

50.21 ± 1.80

54.45 ± 0.98

21.869

0.000

FF_{left PM}

4.15 ± 0.36

4.67 ± 0.55

5.30 ± 0.53

6.11 ± 1.27

7.451

0.000

FF_{right PM}

3.97 ± 0.33

4.92 ± 0.61

4.91 ± 0.48

6.30 ± 1.28

t

 − 0.997

 − 0.756

 − 1.815

 − 1.868

–

–

P

0.325

0.460

0.084

0.070

–

–

S1

(× 10³mm²)

51.29 ± 1.91

57.43 ± 3.32

62.82 ± 4.81

68.68 ± 17.47

14.709

0.000

S2

(× 10³mm²)

20.42 ± 1.05

22.94 ± 2.16

27.82 ± 2.16

32.16 ± 1.07

12.256

0.000

S3(%)

39.38 ± 0.85

39.43 ± 1.9

44.74 ± 1.05

46.89 ± 1.02

12.386

0.000