Predictors of Nonelective Surgery for Spinal Metastases

STUDY DESIGN Secondary analysis of a national all-payer database. OBJECTIVE Our objectives were to identify patient- and hospital-level factors independently associated with the receipt of nonelective surgery and determine whether nonelective surgery portends differences in perioperative outcomes compared to elective surgery for spinal metastases. SUMMARY OF BACKGROUND DATA Spinal metastases may progress to symptomatic epidural spinal cord compression that warrants urgent surgical intervention. Although nonelective surgery for spinal metastases has been associated with poor postoperative outcomes, literature evaluating disparities in the receipt of nonelective versus elective surgery in this population is lacking. METHODS The National Inpatient Sample (2012-2015) was queried for patients who underwent surgical intervention for spinal metastases. Multivariable logistic regression models were constructed to evaluate the association of patient- and hospital-level factors with the receipt of nonelective surgery, as well as to evaluate the influence of admission status on perioperative outcomes. RESULTS After adjusting for disease-related factors and other baseline covariates, our multivariable logistic regression model revealed several sociodemographic differences in the receipt of nonelective surgery. Patients of black (odds ratio [OR] = 1.38, 95% confidence interval [CI]: 1.03-1.84, P = 0.032) and other race (OR = 1.50, 95% CI: 1.13-1.98, P = 0.005) had greater odds of undergoing nonelective surgery than their white counterparts. Patients of lower income (OR = 1.40, 95% CI: 1.06-1.84, P = 0.019) and public insurance status (OR = 1.56, 95% CI: 1.26-1.93, P