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Table 1 Characteristics of the sample studied

From: Hand grip strength and maximum peak expiratory flow: determinants of bone mineral density of adolescent students

Variables

Males (n = 750)

Females (677)

Both sexes (n = 1427)

Mean

SD

Mean

SD

Mean

SD

Age (years)

15.67

2.04

15.45

2.18

15.59

2.09

Biological age (APHV)

14.98

0.93

11.78

0.48*

  

Anthropometry

 Weight (kg)

64.81

14.86

58.67

12.52*

62.66

14.38

 Standing height (cm)

165.41

17.45

152.84

28.81*

160.92

22.98

 Sitting height (cm)

86.93

6.17

83.02

4.28*

85.59

5.89

 BMI (kg/m2)

23.18

4.30

23.41

4.31

23.26

4.30

Body composition (DXA)

 Percentage of Fat (% G)

23.99

8.49

34.94

7.37*

27.7

9.64

 Fat Mass (kg)

15.34

8.18

20.23

8.19*

17.01

8.50

 Lean Mass (kg)

46.76

9.92

36.2

6.85*

43.18

10.29

BMD (g/cm2)

 Body total

1.051

0.160

0.941

0.110*

1.010

0.152

BMC (g)

 Body total

2.509

0.543

2.051

0.35*

2.348

0.532

Isometric strength (lbf)

 Right Hand

65.27

30.24

50.03

19.19*

59.01

27.31

 Left Hand

62.84

28.84

46.95

17.69*

56.32

26.07

 Maximum peak expiratory flow (L/min)

368.89

119.37

296.35

82.86*

346.02

114.18

  1. X Mean, SD Standard deviation, APHV Age at peak height velocity, BMI Body Mass Index, BMD Bone Mineral Density, BMC Bone Mineral Content, * = Significant difference (p < 0.001)