Document Classification

Section Type: RESULTS

Text: After multivariate analysis, risk factors for ION after spinal fusion surgery included male sex (odds ratio [OR] 2. 53, 95 % CI 1. 35-4. 91, P = 0. 005), obesity (OR 2. 83, 95 % CI 1. 52-5. 39, P = 0. 001), Wilson frame use (OR 4. 30, 95 % CI 2. 13-8. 75, P < 0. 001), anesthesia duration (OR per 1 h = 1. 39, 95 % CI 1. 22-1. 58, P < 0. 001), estimated blood loss (OR per 1 l = 1. 34, 95 % CI 1. 13-1. 61, P = 0. 001), and colloid as percent of nonblood replacement (OR per 5 % = 0. 67, 95 % CI 0. 52-0. 82, P < 0. 001).