Table 5 Univariate and multivariate analyses of intraoperative endplate injury

OR

95% CI

p value

OR

95% CI

p value

sex (female)

2.715

1.493–4.939

0.001

2.393

1.289–4.446

0.006*

age

1.003

0.967–1.041

0.865

fusion level (2 levels)

1.131

0.657–1.949

0.656

osteopenia

0.898

0.432–1.868

0.774

osteoporosis

3.176

1.552–6.499

0.002

3.539

1.649–7.598

0.001*

Spine BMD (x10^3)

0.997

0.996–0.999

0.001

0.997

0.995–0.999

< 0.001*

femur BMD (x10^3)

0.997

0.995–0.999

0.002

0.997

0.994–0.999

0.010*

Ca

0.759

0.437–1.317

0.326

P

1.171

0.715–1.919

0.530

vit.D

0.992

0.974–1.009

0.355

PTH

1.008

0.997–1.018

0.142

osteocalcin

0.988

0.904–1.079

0.784

P1NP

1.007

0.999–1.016

0.100

CTX (x10^3)

1.003

1.001–1.004

< 0.001

1.003

1.002–1.005

< 0.001

P1NP/CTX

0.995

0.991–0.999

0.019

0.994

0.990–0.999

0.015†

preoperative disc height

0.689

0.576–0.824

< 0.001

0.698

0.551–0.885

0.003

Discrepancy between preoperative disc height and cage size

1.754

1.401–2.196

< 0.001

1.624

1.230–2.143

0.004