In multivariate analysis , PRE was a significant predictor for hospital stay after surgery ( odds ratio , @ ; @ % confidence interval , @-@ @ ) , longer hospitalization ( count ratio , @ -LSB- @-@ @ -RSB- ) , higher excess costs ( cost ratio , @ -LSB- @-@ @ -RSB- ) , and indirect cost ( cost ratio , @ -LSB- @-@ @ -RSB- ) after adjusting for patient and anesthesia characteristics .