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Table 1 Demographic characteristics of training set and testing set

From: Risk factors for recollapse of new vertebral compression fractures after percutaneous kyphoplasty in geriatric patients: establishment of a nomogram

Characteristics

Training set(263)

Testing set(108)

P value

Gender

  

0.06

  Male

68

18

 

  Female

195

90

 

Age(year)

72.48 ± 7.29

72.10 ± 7.54

0.65

BMI(Kg/m2)

23.16 ± 3.32

22.73 ± 3.08

0.25

HU value

81.13 ± 24.51

79.76 ± 27.05

0.63

Cement volume

4.74 ± 0.79

4.73 ± 0.83

0.87

Cement leakage

  

0.25

  No

184

82

 

  Yes

79

26

 

TL junction

  

0.38

  No

99

46

 

  Yes

164

62

 

Preoperative angle

18.52 ± 5.77

18.91 ± 6.65

0.64

Postoperative angle

12.35 ± 4.65

12.67 ± 4.89

0.55

Change angle

6.25 ± 4.03

6.25 ± 4.51

0.99

Bisphosphonates

  

0.24

  No

83

41

 

  Yes

180

67

 
  1. BMI body mass index, HU Hounsfield unit, TL thoracolumbar