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Table 2 Anthropometry, bone mineral parameters and biomechanical calculations of femoral neck.

From: A school-curriculum-based exercise intervention program for two years in pre-pubertal girls does not influence hip structure

 

Intervention

control

p-value

   Baselinea

(N = 42)

(N = 43)

 

Total body

   

Weight (kg)

27.8 (5.4)

26.5 (4.3)

0.22

Height (cm)

128.8 (5.1)

128.7 (7.5)

0.94

Lean mass (kg)

20.1 (2.3)

20.0 (2.6)

0.90

Fat mass (kg)

5.3 (3.7)

4.5 (2.4)

0.28

Femoral neck

   

BMC (g)

2.524 (0.468)

2.536 (0.497)

0.91

BMD (g/cm2)

0.722 (0.091)

0.701 (0.090)

0.30

Cross-sectional area (CSA, cm2)

0.909 (0.141)

0.889 (0.152)

0.54

Periosteal width (cm)

2.424 (0.162)

2.463 (0.225)

0.37

Section modulus (Z, cm3)

0.279 (0.064)

0.272 (0.082)

0.66

Cross-sectional moment of inertia (CSMI, cm4)

0.341 (0.096)

0.338 (0.130)

0.90

   Follow-Up

(N = 42)

(N = 43)

 

Total body

   

Weight (kg)

35.6 (8.0)

32.5 (5.7)

0.04

Height (cm)

141.0 (6.5)

139.7 (8.0)

0.45

Lean mass (kg)

24.6 (3.5)

23.6 (3.0)

0.18

Fat mass (kg)

8.9 (5.8)

6.3 (3.4)

0.01

Femoral neck

   

BMC (g)

3.146 (0.506)

3.030 (0.518)

0.30

BMD (g/cm2)

0.803 (0.080)

0.789 (0.103)

0.50

Cross-sectional area (CSA, cm2)

1.100 (0.175)

1.067 (0.187)

0.41

Periosteal width (cm)

2.640 (0.226)

2.593 (0.190)

0.30

Section modulus (Z, cm3)

0.377 (0.085)

0.368 (0.099)

0.66

Cross-sectional moment of inertia (CSMI, cm4)

0.506 (0.154)

0.483 (0.159)

0.49

   Annual Changes

(N = 42)

(N = 43)

 

Total body

   

Weight (kg)

3.9 (1.6)

3.0 (1.1)

0.006

Height (cm)

6.0 (1.1)

5.6 (0.9)

0.06

Lean mass (kg)

2.3 (0.8)

1.8 (0.5)

0.003

Fat mass (kg)

1.8 (1.3)

0.9 (0.7)

0.001

Femoral neck

   

BMC (g)

0.310 (0.234)

0.252 (0.236)

0.25

BMD (g/cm2)

0.040 (0.033)

0.045 (0.042)

0.62

Cross-sectional area (CSA, cm2)

0.095 (0.065)

0.091 (0.078)

0.77

Periosteal width (cm)

0.107 (0.107)

0.067 (0.113)

0.10

Section modulus (Z, cm3)

0.049 (0.030)

0.049 (0.042)

0.98

Cross-sectional moment of inertia (CSMI, cm4)

0.082 (0.057)

0.074 (0.067)

0.54

  1. Comparison between the intervention group (n = 42) and the control group (n = 43) in anthropometrics, bone mineral parameters and biomechanical calculations in femoral neck at baseline, at two year follow-up and in annual changes during the follow-up period. Data presented as mean ± SD.