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Table 1 Demographics of all specimens

From: Differences in bone mineral density of trajectory between lumbar cortical and traditional pedicle screws

Age

Sex

Number

Mean age (years)

Mean height (cm)

Mean weight (kg)

20–29

Male

20

24.27 ± 3.12

164.32 ± 10.48

63.14 ± 5.17

Female

20

25.25 ± 3.82

157.24 ± 7.14

50.45 ± 3.54

30–39

Male

20

33.82 ± 2.54

168.21 ± 8.17

66.78 ± 4.23

Female

20

35.35 ± 3.71

160.74 ± 7.98

52.17 ± 4.51

40–49

Male

20

44.88 ± 1.88

166.87 ± 7.54

70.79 ± 6.21

Female

20

46.46 ± 2.96

161.28 ± 6.19

61.67 ± 6.41

50–59

Male

20

54.06 ± 3.84

167.44 ± 7.46

69.18 ± 7.83

Female

20

55.00 ± 3.16

159.97 ± 7.17

58.47 ± 5.17

60–69

Male

20

64.37 ± 2.47

166.45 ± 5.86

64.14 ± 7.41

Female

20

64.33 ± 3.62

160.47 ± 5.24

56.71 ± 5.84

Above 70

Male

20

74.17 ± 5.47

167.32 ± 7.22

66.79 ± 5.17

Female

20

74.00 ± 4.13

158.15 ± 6.17

56.11 ± 4.69