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Total Laminectomy Without Fusion, n Laminectomy With Fusion, n Total, n Rate of Undergoing Fusion Procedures Cervical 311 72 383 19% Thoracic 801 67 868 8% Lumbar 734 42 776 5% Total 1846 181 2027 9% Laminectomy Without Fusion Laminectomy With Fusion Variable n % n % P Value Total 1846 181 Cervical 301 16% 72 40% <0.001 Thoracic 801 43% 67 37% Lumbar 734 40% 42 23% Age, y, mean 54.8 56.8 0.1118 Body mass index, mean 29.27 29.73 0.4186 Male 833 45% 91 50% 0.184 Female 1013 55% 90 50% American Society of Anesthesiologists classification 1 73 4% 4 2% 0.046 2 749 41% 66 36% 3 936 51% 94 52% 4 85 5% 16 9% Smoking 265 14% 31 17% 0.314 Functional status Independent 1722 93% 171 94% 0.617 Dependent 99 5% 9 5% Totally dependent 17 1% 0 0% Unknown 8 0% 1 1% Diabetes 239 13% 20 11% 0.466 Chronic obstructive pulmonary disease 49 3% 7 4% 0.342 Congestive heart failure 3 0% 0 0% 0.587 Hypertension 719 39% 85 47% 0.035 Renal failure 0 0% 0 0% Dialysis 2 0% 2 1% 0.004 Weight loss 19 1% 1 1% 0.536 Steroid use 116 6% 19 10% 0.03 Bleeding disorder 32 2% 3 2% 0.94 Dyspnea at rest 3 0% 1 1% 0.048 Dyspnea at moderate exertion 56 3% 11 6% Note: Data presented as n and % unless otherwise indicated.
Outcome Laminectomy Without Fusion Laminectomy With Fusion n % n % P Value Total 1985 42 Cardiac arrest 5 0.25% 0 0.00% 0.745 Myocardial infarction 2 0.10% 0 0.00% 0.837 Renal insufficiency 1 0.05% 1 2.38% <0.001 Deep vein thrombosis 28 1.41% 1 2.38% 0.6 Pulmonary embolism 19 0.96% 0 0.00% 0.524 Cerebral vascular accident or stroke 4 0.20% 0 0.00% 0.771 Mortality 20 1.01% 0 0.00% 0.513 Transfusion 87 4.38% 1 2.38% 0.529 Length of stay >5 d 739 37.23% 25 59.52% 0.001 Return to operating room 67 3.38% 23 54.76% <0.001 Risk Factor OR Lower CI Bound Upper CI Bound P Value Body mass index 1.05 1.01 1.09 0.01 Diabetes 1.14 0.49 2.65 0.769 Hypertension 1.88 0.88 4.05 0.105 Weight loss 12.23 3.27 45.75 <0.001
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