Discriminative ability of commonly used indices to predict adverse outcomes after poster lumbar fusion: a comparison of demographics, ASA, the modified charlson comorbidity index, and the modified frailty index

As research tools, the American Society of Anesthesiologist physical classification system (ASA), the modified Charlson Comorbidity Index (mCCI), and the modified Frailty Index (mFI) have been associated with complications following spine procedures. However, with respect to clinical utility for various adverse outcomes, no known study has compared the predictive performance of these indices specifically following posterior lumbar fusion (PLF).

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