Table 4.

Adjusted Odds of Reoperation Procedures, Complications, and Readmissions at 90 Days Post-operatively in Anterior Compared with Posterior Interbody Fusion

	Anterior	Posterior	OR	95% CI	p-value
Reoperation	1,547 (10.3%)	5,706 (15.6%)	0.63	0.59 – 0.66	<0.001
Deep vein thrombosis	65 (0.4%)	51 (0.1%)	2.53	1.74 – 3.70	<0.001
Ileus	350 (2.3%)	589 (1.6%)	1.43	1.25 – 1.64	<0.001
Acute kidney injury	421 (2.8%)	1,077 (2.9%)	0.84	0.75 – 0.95	0.0046
Cauda equina syndrome	67 (0.5%)	276 (0.8%)	0.53	0.40 – 0.69	<0.001
Transfusion	257 (1.7%)	944 (2.6%)	0.68	0.58 – 0.78	<0.001
Postoperative hematoma	125 (0.8%)	301 (0.8%)	0.95	0.77 – 1.17	0.64
Wound complication	793 (5.3%)	1,918 (5.2%)	0.90	0.83 – 0.98	0.01
Major medical complications	588 (3.9%)	1,376 (3.8%)	0.95	0.86 – 1.06	0.37
Readmission	1,345 (9.0%)	2,447 (6.7%)	1.28	1.19 – 1.38	<0.001
Total	14,971	36,648