Systematic Changes in the National Surgical Quality Improvement Program Database Over the Years Can Affect Comorbidity Indices Such as the Modified Frailty Index and Modified Charlson Comorbidity Index for Lumbar Fusion Studies
Shultz BN, Ottesen TD, Ondeck NT, Bovonratwet P, McLynn RP, Cui JJ, Grauer JN. Systematic Changes in the National Surgical Quality Improvement Program Database Over the Years Can Affect Comorbidity Indices Such as the Modified Frailty Index and Modified Charlson Comorbidity Index for Lumbar Fusion Studies. Spine 2018, 43: 798-804. PMID: 28922281, DOI: 10.1097/brs.0000000000002418.Peer-Reviewed Original ResearchConceptsNational Surgical Quality Improvement Program databaseQuality Improvement Program databaseCharlson Comorbidity IndexImprovement Program databaseComorbidity indexFrailty indexNSQIP databaseProgram databaseSurgeons National Surgical Quality Improvement Program databaseElective posterior lumbar fusionModified Charlson Comorbidity IndexModified Frailty IndexAdverse postoperative outcomesRetrospective cohort studyMean American SocietyMean ASA scorePosterior lumbar fusionAnesthesiologists (ASA) scoreASA scoreCohort studyPostoperative outcomesLumbar fusionBACKGROUND DATAAmerican CollegePatients