Stepwise multivariate ordinal logistic regression model of preoperative and surgical variables associated with pedicle screw accuracy.
Variable | Univariable | Multivariable | ||
OR | P | OR (95% CI) | P | |
Age | 1.00 | 0.67 | ||
Gender | ||||
Men | 1.89 | 0.03a b | 2.12 (1.10, 4.09) | 0.03b |
Race | ||||
White | 0.61 | 0.08a | 0.39 (0.07, 2.02) | 0.26 |
African American | 1.68 | 0.07a | 0.83 (0.16, 4.43) | 0.83 |
Asian | 1.53 | 0.69 | ||
Unreported/unknown | 0.73 | 0.76 | ||
BMI | 0.99 | 0.81 | ||
Cancer | 1.37 | 0.56 | ||
Frankel Grade | 0.89 | 0.59 | ||
Karnofsky Score | 1.39 | 0.21 | ||
CCI | 0.99 | 0.80 | ||
ASA status | 0.93 | 0.77 | ||
Diagnosis | ||||
Spondylolisthesis | 0.32 | 0.01a b | 0.62 (0.23, 1.69) | 0.35 |
Fracture | 0.72 | 0.34 | ||
Pseudarthrosis | 2.26 | 0.02a b | 1.51 (0.59, 3.82) | 0.39 |
Spondylosis | 0.90 | 0.83 | ||
Tumor | 1.34 | 0.55 | ||
Other | 1.67 | 0.08a | 0.96 (0.36, 2.57) | 0.93 |
Revision | 3.49 | <0.001a b | 2.43 (1.15, 5.11) | 0.02b |
Screw location | ||||
Cervical | <0.001 | 0.97 | ||
Thoracic | 2.62 | 0.00a b | 2.33 (1.22, 4.43) | 0.01b |
Lumbar | 0.80 | 0.42 | ||
Sacral | 0.26 | 0.06a | 0.33 (0.08, 1.45) | 0.14 |
Approach | ||||
Posterior | 0.46 | 0.12 | ||
Incision | ||||
Midline | 0.98 | 0.93 | ||
Bilateral | 1.34 | 0.30 | ||
Both | 0.55 | 0.21 | ||
Screw number | 1.07 | <0.001a b | 1.03 (0.96, 1.11) | 0.39 |
EBL | 1.00 | 0.10 | ||
Incision-to-extubation time | 1.00 | 0.03a b | 1 (0.99, 1.00) | 0.15 |