Table 1 Patient demographics

 Male

50.12 ± 17.85

103

167.74 ± 54.67

 Female

55.21 ± 13.46

97

156.47 ± 58.66

  < 40

29.02 ± 6.39

43

221.23 ± 40.06

 40 ~ 50

44.89 ± 2.86

37

192.09 ± 42.64

 50 ~ 60

54.78 ± 2.72

45

145.38 ± 39.30

 60 ~ 70

64.40 ± 2.91

47

131.47 ± 39.38

  ≥ 70

76.33 ± 4.44

28

120.59 ± 45.16

 Normal

43.25 ± 15.14

99

207.89 ± 39.25

 Osteopenia

59.24 ± 10.67

71

132.39 ± 14.06

 Osteoporosis

68.07 ± 8.08

30

79.92 ± 15.92

 Non-lumbar spondylolisthesis

63.14 ± 10.53

152

133.77 ± 42.87

 Lumbar spondylolisthesis

51.67 ± 3.44

48

181.62 ± 40.83

 Lumbar spondylolisthesis and osteoporosis

64.73 ± 6.21

16

86.45 ± 13.76

Total

52.57 ± 16.10

200

162.30 ± 56.76