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Table 3 Multivariate analysis of risk factors for PJK

From: Risk factors for proximal junctional kyphosis after posterior long-segment internal fixation for chronic symptomatic osteoporotic thoracolumbar fractures with kyphosis

Variable

β

SE

Wald

OR value

95%CI

P value

Age > 70 years

3.474

1.088

10.198

32.279

3.827–272.291

0.001

BMI > 28 kg/m2

2.064

0.803

6.608

7.876

1.633–37.993

0.010

BMD T value < -3.5SD

3.037

1.111

7.469

20.836

2.360–183.928

0.006

PLC injury

2.638

1.184

4.963

13.981

1.373–142.344

0.026

PI-LL > 20°

2.588

1.096

5.580

13.301

1.544–113.869

0.018

  1. PJK proximal junctional kyphosis, BMI body mass index, BMD bone mineral density, PLC posterior ligament complex, PI-LL pelvic incidence-lumbar lordosis mismatch, OR odds ratio, CI confidence interval