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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

Lumbar SpineGeriatricsFrailty IndexSpinal FusionOutcomes ResearchDiscriminative AbilityFrailtyMedicineOrthopaedic SurgeryLogistic AnalysisPoster Lumbar FusionGeriatric Spine