2023
Association Between Intravenous to Oral Opioid Transition Time and Length of Hospital Stay After Posterior Spinal Fusion for Adolescent Idiopathic Scoliosis.
Hengartner A, Havlik J, David W, Reeves B, Freedman I, Sarkozy M, Maloy G, Fernandez T, Craft S, Koo A, Tuason D, DiLuna M, Elsamadicy A. Association Between Intravenous to Oral Opioid Transition Time and Length of Hospital Stay After Posterior Spinal Fusion for Adolescent Idiopathic Scoliosis. The International Journal Of Spine Surgery 2023, 17: 468-476. PMID: 37076256, PMCID: PMC10312154, DOI: 10.14444/8448.Peer-Reviewed Original ResearchPosterior spinal fusionAdolescent idiopathic scoliosisExtended LOSSpinal fusionIdiopathic scoliosisMultivariate analysisMultilevel posterior spinal fusionLength of hospitalPostoperative complication rateMajor academic institutionOral opioidsHospital LOSStudy patientsDischarge dispositionHospital lengthPostoperative complicationsPostoperative courseComplication rateIntraoperative variablesLonger LOSPatient demographicsReadmission ratesMedical recordsUnivariate analysisOdds ratio
2021
Race Is an Independent Predictor for Nonroutine Discharges After Spine Surgery for Spinal Intradural/Cord Tumors
Elsamadicy AA, Koo AB, David WB, Reeves BC, Freedman IG, Pennington Z, Ehresman J, Kolb L, Laurans M, Shin JH, Sciubba DM. Race Is an Independent Predictor for Nonroutine Discharges After Spine Surgery for Spinal Intradural/Cord Tumors. World Neurosurgery 2021, 151: e707-e717. PMID: 33940256, DOI: 10.1016/j.wneu.2021.04.085.Peer-Reviewed Original ResearchConceptsNonroutine discharge dispositionIndependent predictorsNonroutine dischargeDischarge dispositionCord tumorsAA raceSurgical interventionNational Inpatient Sample databaseMultivariable logistic regression analysisStepwise multivariable logistic regression analysisBackward stepwise multivariable logistic regression analysisAfrican AmericansPostoperative complication rateRetrospective cohort studyClinical Modification diagnosisLength of hospitalizationProcedural Coding SystemLogistic regression analysisHealth care costsRegression analysisMultivariate regression analysisAA/BlackPostoperative complicationsCohort studyComplication rate
2019
Reduced Influence of Affective Disorders on 6-Week and 3-Month Narcotic Refills After Primary Complex Spinal Fusions for Adult Deformity Correction: A Single-Institutional Study
Elsamadicy AA, Charalambous L, Adil SM, Drysdale N, Lee M, Koo AB, Chouairi F, Kundishora AJ, Camara-Quintana J, Qureshi T, Kolb L, Laurans M, Abbed K, Karikari IO. Reduced Influence of Affective Disorders on 6-Week and 3-Month Narcotic Refills After Primary Complex Spinal Fusions for Adult Deformity Correction: A Single-Institutional Study. World Neurosurgery 2019, 129: e311-e316. PMID: 31132486, DOI: 10.1016/j.wneu.2019.05.135.Peer-Reviewed Original ResearchConceptsPrimary complex spinal fusionComplex spinal fusionNarcotic refillsPain scoresSpinal fusionAffective disordersDeformity correctionNarcotic useDeformity patientsAD cohortPatient-reported pain scoresAdult spine deformity patientsAdult deformity correctionPostoperative pain scoresPostoperative complication ratePreoperative narcotic useHigher pain scoresSpinal deformity patientsSpine deformity patientsMajor academic institutionAmbulatory statusComplication ratePatient demographicsPrimary outcomePostoperative perceptionAssociation Between Preoperative Narcotic Use with Perioperative Complication Rates, Patient Reported Pain Scores, and Ambulatory Status After Complex Spinal Fusion (≥5 Levels) for Adult Deformity Correction
Elsamadicy AA, Drysdale N, Adil SM, Charalambous L, Lee M, Koo A, Freedman IG, Kundishora AJ, Camara-Quintana J, Qureshi T, Kolb L, Laurans M, Abbed K, Karikari IO. Association Between Preoperative Narcotic Use with Perioperative Complication Rates, Patient Reported Pain Scores, and Ambulatory Status After Complex Spinal Fusion (≥5 Levels) for Adult Deformity Correction. World Neurosurgery 2019, 128: e231-e237. PMID: 31009775, DOI: 10.1016/j.wneu.2019.04.107.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedBone TransplantationDepressionFemaleHumansIntraoperative Neurophysiological MonitoringLaminectomyLength of StayMaleMiddle AgedMobility LimitationNarcoticsOsteotomyPainPain MeasurementPain, PostoperativePatient ReadmissionPatient Reported Outcome MeasuresPostoperative ComplicationsPreoperative PeriodSpinal DiseasesSpinal FusionConceptsComplex spinal fusionPain scoresPerioperative complication ratePreoperative narcotic useComplication rateSpinal fusionAmbulatory statusNarcotic usePatient demographicsDeformity correctionPatient-reported pain scoresPrimary complex spinal fusionAdult deformity correctionLast pain scoreNon-user cohortsPostoperative pain scoresPostoperative complication rateHigher pain scoresPhysical therapy regimensPrevalence of depressionGreater mean ageUse of narcoticsMajor academic institutionAmbulatory dayPreoperative useReduced Impact of Obesity on Short-Term Surgical Outcomes, Patient-Reported Pain Scores, and 30-Day Readmission Rates After Complex Spinal Fusion (≥7 Levels) for Adult Deformity Correction
Elsamadicy AA, Camara-Quintana J, Kundishora AJ, Lee M, Freedman IG, Long A, Qureshi T, Laurans M, Tomak P, Karikari IO. Reduced Impact of Obesity on Short-Term Surgical Outcomes, Patient-Reported Pain Scores, and 30-Day Readmission Rates After Complex Spinal Fusion (≥7 Levels) for Adult Deformity Correction. World Neurosurgery 2019, 127: e108-e113. PMID: 30876992, DOI: 10.1016/j.wneu.2019.02.165.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedBody Mass IndexComorbidityDiabetes MellitusDyslipidemiasElective Surgical ProceduresFemaleHeart DiseasesHumansHypertensionLaminectomyLength of StayMaleMiddle AgedObesityPain, PostoperativePatient ReadmissionPatient Reported Outcome MeasuresPostoperative ComplicationsPrevalencePulmonary Disease, Chronic ObstructiveRetrospective StudiesSpinal DiseasesSpinal FusionTreatment OutcomeUnited StatesYoung AdultConceptsPatient-reported pain scoresComplex spinal fusionPain scoresImpact of obesityReadmission ratesSurgical outcomesDeformity correctionSpinal fusionAmbulatory statusPatient demographicsComplication ratePreoperative body mass indexPrimary complex spinal fusionShort-term surgical outcomesAdult deformity correctionInferior surgical outcomesPostoperative complication profileLength of surgeryPostoperative complication ratePrevalence of obesityBody mass indexPatient-reported outcomesComplex spinal surgeryPaucity of dataMajor academic institutionRate of instrumentation changes on postoperative and follow-up radiographs after primary complex spinal fusion (five or more levels) for adult deformity correction.
Elsamadicy AA, Lubkin DT, Sergesketter AR, Adil SM, Charalambous LT, Drysdale N, Williamson T, Camara-Quintana J, Abd-El-Barr MM, Goodwin CR, Karikari IO. Rate of instrumentation changes on postoperative and follow-up radiographs after primary complex spinal fusion (five or more levels) for adult deformity correction. Journal Of Neurosurgery Spine 2019, 30: 376-381. PMID: 30641841, DOI: 10.3171/2018.9.spine18686.Peer-Reviewed Original ResearchConceptsPrimary complex spinal fusionComplex spinal fusionSpinal fusionSpine surgeryDeformity correctionAdult deformity correctionCost-conscious healthcareMethodsThe medical recordsPostoperative complication rateMean lengthBody mass indexFollow-up radiographsRevision of surgeryComplex spine surgeryMajor academic institutionHospital stayAdult patientsComplication ratePatient demographicsReadmission ratesBlood lossPrimary outcomeMass indexEarly radiographsPostoperative radiographs
2018
Impact of Chronic Obstructive Pulmonary Disease on Postoperative Complication Rates, Ambulation, and Length of Hospital Stay After Elective Spinal Fusion (≥3 Levels) in Elderly Spine Deformity Patients
Elsamadicy AA, Sergesketter AR, Kemeny H, Adogwa O, Tarnasky A, Charalambous L, Lubkin DET, Davison MA, Cheng J, Bagley CA, Karikari IO. Impact of Chronic Obstructive Pulmonary Disease on Postoperative Complication Rates, Ambulation, and Length of Hospital Stay After Elective Spinal Fusion (≥3 Levels) in Elderly Spine Deformity Patients. World Neurosurgery 2018, 116: e1122-e1128. PMID: 29870850, DOI: 10.1016/j.wneu.2018.05.185.Peer-Reviewed Original ResearchConceptsChronic obstructive pulmonary diseaseElective spinal fusionPostoperative complication rateObstructive pulmonary diseaseSpine deformity patientsHospital stayCOPD cohortComplication rateSpinal fusionDeformity patientsPulmonary diseaseIncidence of durotomyModifiable risk factorsProportion of smokersLength of staySpinal deformity patientsHealth care resourcesHigh rateMajor academic institutionPostoperative feverPostoperative pneumoniaAmbulatory statusHospital lengthPostoperative complicationsElderly patients
2017
The Impact of Chronic Kidney Disease on Postoperative Outcomes in Patients Undergoing Lumbar Decompression and Fusion
Adogwa O, Elsamadicy AA, Sergesketter A, Oyeyemi D, Galan D, Vuong VD, Khalid S, Cheng J, Bagley CA, Karikari IO. The Impact of Chronic Kidney Disease on Postoperative Outcomes in Patients Undergoing Lumbar Decompression and Fusion. World Neurosurgery 2017, 110: e266-e270. PMID: 29109065, DOI: 10.1016/j.wneu.2017.10.147.Peer-Reviewed Original ResearchConceptsChronic kidney diseaseCKD groupPatient demographicsKidney diseaseLumbar arthrodesisPreoperative chronic kidney diseaseInferior perioperative outcomesLumbar spine decompressionPostoperative complication profileLength of surgeryPostoperative complication rateEpisode of deliriumUrinary tract infectionDeep vein thrombosisBody mass indexIntensive care unitMajor academic institutionPerioperative complicationsPerioperative outcomesPostoperative complicationsPrimary endpointAdult patientsComplication rateLumbar decompressionPostoperative outcomesImpact of alcohol use on 30-day complication and readmission rates after elective spinal fusion (≥2 levels) for adult spine deformity: a single institutional study of 1,010 patients
Elsamadicy AA, Adogwa O, Vuong VD, Sergesketter A, Reddy G, Cheng J, Bagley CA, Karikari IO. Impact of alcohol use on 30-day complication and readmission rates after elective spinal fusion (≥2 levels) for adult spine deformity: a single institutional study of 1,010 patients. Journal Of Spine Surgery 2017, 3: 403-410. PMID: 29057350, PMCID: PMC5637196, DOI: 10.21037/jss.2017.08.12.Peer-Reviewed Original ResearchElective spinal fusionReadmission ratesSpinal fusionAlcohol useAdult patientsComplication rateSpinal deformityPostoperative complication profilePreoperative alcohol usePostoperative complication ratePost-operative complicationsSingle institutional studyAdult spine deformitySpinal fusion surgeryHistory of alcoholSignificant differencesMajor academic institutionElective correctionBaseline characteristicsPostoperative complicationsIntraoperative variablesPrimary outcomeComplication profileSurgical outcomesFusion surgeryReduced Impact of Smoking Status on 30-Day Complication and Readmission Rates After Elective Spinal Fusion (≥3 Levels) for Adult Spine Deformity: A Single Institutional Study of 839 Patients
Elsamadicy AA, Adogwa O, Sergesketter A, Vuong VD, Lydon E, Behrens S, Cheng J, Bagley CA, Karikari IO. Reduced Impact of Smoking Status on 30-Day Complication and Readmission Rates After Elective Spinal Fusion (≥3 Levels) for Adult Spine Deformity: A Single Institutional Study of 839 Patients. World Neurosurgery 2017, 107: 233-238. PMID: 28790002, DOI: 10.1016/j.wneu.2017.07.174.Peer-Reviewed Original ResearchConceptsReadmission ratesSmoking statusComplex spinal fusionSpinal fusionPostoperative complicationsPatient demographicsComplication rateSimilar postoperative complication ratesAdult spinal deformity patientsPostoperative complication rateSingle institutional studyBody mass indexElective spinal fusionPatients' smoking statusAdult spine deformitySpinal deformity patientsComplex spinal surgeryMajor academic institutionHospital stayPostoperative outcomesPrimary outcomeWound drainageMass indexOperative timeDeformity patientsDepression as an independent predictor of postoperative delirium in spine deformity patients undergoing elective spine surgery.
Elsamadicy AA, Adogwa O, Lydon E, Sergesketter A, Kaakati R, Mehta AI, Vasquez RA, Cheng J, Bagley CA, Karikari IO. Depression as an independent predictor of postoperative delirium in spine deformity patients undergoing elective spine surgery. Journal Of Neurosurgery Spine 2017, 27: 209-214. PMID: 28574333, DOI: 10.3171/2017.4.spine161012.Peer-Reviewed Original ResearchMeSH KeywordsAcademic Medical CentersAge FactorsComorbidityDecompression, SurgicalDeliriumDepressionElective Surgical ProceduresFemaleHumansLogistic ModelsMaleMiddle AgedMultivariate AnalysisOperative TimePostoperative ComplicationsPrognosisRetrospective StudiesRisk FactorsSpinal CurvaturesSpinal FusionSpineConceptsElective spine surgeryMultivariate logistic regression analysisPostoperative deliriumIndependent risk factorPostoperative complication rateSpine surgeryLogistic regression analysisPatient demographicsComplication rateIndependent predictorsDeformity patientsRisk factorsDepression groupAffective disordersSuperficial surgical site infectionSignificant between-group differencesInferior surgical outcomesPostoperative delirium rateResults Patient demographicsInitial hospital stayProportion of patientsRate of complicationsSurgical site infectionUrinary tract infectionDeep vein thrombosisAssociation of Intraoperative Blood Transfusions on Postoperative Complications, 30-Day Readmission Rates, and 1-Year Patient-Reported Outcomes
Elsamadicy AA, Adogwa O, Vuong VD, Mehta AI, Vasquez RA, Cheng J, Bagley CA, Karikari IO. Association of Intraoperative Blood Transfusions on Postoperative Complications, 30-Day Readmission Rates, and 1-Year Patient-Reported Outcomes. Spine 2017, 42: 610-615. PMID: 28399073, DOI: 10.1097/brs.0000000000001803.Peer-Reviewed Original ResearchConceptsPerioperative allogeneic RBC transfusionAllogeneic RBC transfusionElective spine surgeryPostoperative complication rateReadmission ratesRBC transfusionSpine surgeryPostoperative complicationsComplication rateThirty-day hospital readmission ratesAllogeneic red blood cell transfusionRed blood cell transfusionMultivariate logistic regression analysisMultivariate logistic regression modelPatient-reported outcome instrumentsHigher perioperative complicationsPostoperative hemoglobin levelsIntraoperative blood transfusionBlood cell transfusionHospital readmission ratesMajor academic medical centerLogistic regression analysisAcademic medical centerQuality of careLogistic regression modelsEffect of Social Support and Marital Status on Perceived Surgical Effectiveness and 30-Day Hospital Readmission
Adogwa O, Elsamadicy AA, Vuong VD, Mehta AI, Vasquez RA, Cheng J, Bagley CA, Karikari IO. Effect of Social Support and Marital Status on Perceived Surgical Effectiveness and 30-Day Hospital Readmission. Global Spine Journal 2017, 7: 774-779. PMID: 29238642, PMCID: PMC5721993, DOI: 10.1177/2192568217696696.Peer-Reviewed Original ResearchElective spine surgerySpine surgeryHospital stayReadmission ratesOutcome measuresLong-term clinical outcomesThirty-day readmission ratesLength of hospitalPostoperative complication rateRetrospective cohort reviewTime of surgeryMarital statusSocial supportMajor academic medical centerAcademic medical centerSignificant differencesBaseline characteristicsCohort reviewPatient demographicsComplication rateHospital readmissionClinical outcomesSurgical outcomesSurgical effectivenessMedical recordsIncreased 30-Day Complication Rates Associated with Laminectomy in 874 Adult Patients with Spinal Deformity Undergoing Elective Spinal Fusion: A Single Institutional Study
Elsamadicy AA, Adogwa O, Warwick H, Sergesketter A, Lydon E, Shammas RL, Mehta AI, Vasquez RA, Cheng J, Bagley CA, Karikari IO. Increased 30-Day Complication Rates Associated with Laminectomy in 874 Adult Patients with Spinal Deformity Undergoing Elective Spinal Fusion: A Single Institutional Study. World Neurosurgery 2017, 102: 370-375. PMID: 28359921, DOI: 10.1016/j.wneu.2017.03.096.Peer-Reviewed Original ResearchConceptsElective spinal fusionSpinal fusionSpinal deformityAdult patientsComplication rateComplication Rates AssociatedAllogeneic blood transfusionPostoperative complication rateSingle institutional studyUrinary tract infectionHigh complication rateIntensive care unitMajor academic institutionPatient demographicsReadmission ratesTract infectionsBlood lossBlood transfusionPrimary outcomeWound drainageCare unitIntraoperative durotomyMedical recordsMental statusInstrumentation failureRisk Factors and Independent Predictors of 30-Day Readmission for Altered Mental Status After Elective Spine Surgery for Spine Deformity: A Single-Institutional Study of 1090 Patients
Elsamadicy AA, Adogwa O, Reddy GB, Sergesketter A, Warwick H, Jones T, Cheng J, Bagley CA, Karikari IO. Risk Factors and Independent Predictors of 30-Day Readmission for Altered Mental Status After Elective Spine Surgery for Spine Deformity: A Single-Institutional Study of 1090 Patients. World Neurosurgery 2017, 101: 270-274. PMID: 28192260, DOI: 10.1016/j.wneu.2017.02.001.Peer-Reviewed Original ResearchConceptsElective spine surgeryPostoperative complication rateIndependent predictorsSpine surgeryComplication rateSpine deformityRisk factorsAMS cohortPatient demographicsMental statusInferior surgical outcomesAltered mental statusMultivariate stepwise regression analysisIntensive care unitMajor academic institutionICU transferAdult patientsIntraoperative variablesPulmonary embolismPrimary outcomeCare unitSurgical outcomesMedical recordsReadmissionPatients
2016
Impact of Age on Change in Self-Image 5 Years After Complex Spinal Fusion (≥5 Levels)
Elsamadicy AA, Adogwa O, Sergesketter A, Behrens S, Hobbs C, Bridwell KH, Karikari IO. Impact of Age on Change in Self-Image 5 Years After Complex Spinal Fusion (≥5 Levels). World Neurosurgery 2016, 97: 112-116. PMID: 27713066, DOI: 10.1016/j.wneu.2016.09.095.Peer-Reviewed Original ResearchConceptsPatient-reported outcomesComplex spinal fusionImpact of ageSpinal fusionComplication ratePreoperative variablesSignificant differencesImportant patient-reported outcomeFusion levelsPostoperative complication rateTypes of complicationsDeformity correction surgeryStandard deviation numberSRS-22rAdult patientsBaseline characteristicsEffect of ageIntraoperative variablesPatient demographicsSelf-image scoresYounger patientsPrimary outcomeCorrective surgeryCorrection surgeryPatients' perceptionsImpact of Intraoperative Steroids on Postoperative Infection Rates and Length of Hospital Stay: A Study of 1200 Spine Surgery Patients
Elsamadicy AA, Wang TY, Back AG, Sergesketter A, Warwick H, Karikari IO, Gottfried ON. Impact of Intraoperative Steroids on Postoperative Infection Rates and Length of Hospital Stay: A Study of 1200 Spine Surgery Patients. World Neurosurgery 2016, 96: 429-433. PMID: 27667578, DOI: 10.1016/j.wneu.2016.09.057.Peer-Reviewed Original ResearchConceptsIntraoperative steroidsHospital staySpine surgeryInfection ratePostoperative complicationsPatient demographicsUse cohortSteroid useLong-term steroid useSuperficial surgical site infectionDuke University Medical CenterIntraoperative steroid useSpine surgery patientsPostoperative complication ratePostoperative infection rateShorter hospital staySurgical site infectionUrinary tract infectionUniversity Medical CenterLength of operationLower ratesLow infection rateAdult patientsComplication rateSurgery patientsPatient Body Mass Index is an Independent Predictor of 30-Day Hospital Readmission After Elective Spine Surgery
Elsamadicy AA, Adogwa O, Vuong VD, Mehta AI, Vasquez RA, Cheng J, Karikari IO, Bagley CA. Patient Body Mass Index is an Independent Predictor of 30-Day Hospital Readmission After Elective Spine Surgery. World Neurosurgery 2016, 96: 148-151. PMID: 27593714, DOI: 10.1016/j.wneu.2016.08.097.Peer-Reviewed Original ResearchMeSH KeywordsAdultAgedBody Mass IndexCase-Control StudiesComorbidityDecompression, SurgicalElective Surgical ProceduresFemaleHumansLength of StayLogistic ModelsLumbar VertebraeMaleMiddle AgedMultivariate AnalysisObesityPatient ReadmissionPneumoniaPostoperative ComplicationsRadiculopathyRisk FactorsSpinal DiseasesSpinal FusionSpinal StenosisSpondylolisthesisSurgical Wound InfectionUrinary Tract InfectionsConceptsElective spine surgeryBody mass indexPreoperative body mass indexMultivariate logistic regression analysisDays of dischargeIndependent risk factorHospital readmissionSpine surgeryLogistic regression analysisPreoperative obesityReadmission ratesIndependent predictorsMass indexRisk factorsEarly unplanned hospital readmissionPatient body mass indexUnplanned hospital readmissionPostoperative complication rateAppropriate risk stratificationPrevalence of obesityMajor academic medical centerAcademic medical centerRegression analysisHealth care climateIndex surgeryPreoperative Nutritional Status is an Independent Predictor of 30-day Hospital Readmission After Elective Spine Surgery
Adogwa O, Elsamadicy AA, Mehta AI, Cheng J, Bagley CA, Karikari IO. Preoperative Nutritional Status is an Independent Predictor of 30-day Hospital Readmission After Elective Spine Surgery. Spine 2016, 41: 1400-1404. PMID: 26953667, DOI: 10.1097/brs.0000000000001551.Peer-Reviewed Original ResearchConceptsElective spine surgeryPreoperative serum albumin levelDays of dischargeIndependent risk factorSerum albumin levelHospital readmissionSpine surgeryRisk factorsReadmission ratesPreoperative malnutritionMalnourished patientsAlbumin levelsIndependent predictorsThirty-day hospital readmission ratesNutritional statusMultivariate logistic regression analysisPre-operative malnutritionPreoperative nutritional statusUnplanned hospital readmissionModifiable risk factorsPostoperative complication rateRetrospective cohort reviewHospital readmission ratesIdentification of patientsMajor academic medical centerRace as an Independent Predictor of Temporal Delay in Time to Diagnosis and Treatment in Patients with Cervical Stenosis: A Study of 133 Patients with Anterior Cervical Discectomy and Fusion
Elsamadicy AA, Adogwa O, Fialkoff J, Mehta AI, Vasquez RA, Cheng J, Bagley CA, Karikari IO. Race as an Independent Predictor of Temporal Delay in Time to Diagnosis and Treatment in Patients with Cervical Stenosis: A Study of 133 Patients with Anterior Cervical Discectomy and Fusion. World Neurosurgery 2016, 96: 107-110. PMID: 27567581, DOI: 10.1016/j.wneu.2016.08.070.Peer-Reviewed Original ResearchMeSH KeywordsAdultAge FactorsAgedAnxietyBlack or African AmericanCervical VertebraeDecompression, SurgicalDelayed DiagnosisDepressionDiskectomyEthnicityFemaleHumansLogistic ModelsMaleMiddle AgedMultivariate AnalysisRetrospective StudiesRisk FactorsSex FactorsSpinal FusionSpinal StenosisTime-to-TreatmentWhite PeopleConceptsAnterior cervical discectomyVisual analog scaleCervical stenosisIndependent predictorsCervical discectomyPatient demographicsMultivariate analysisElective anterior cervical discectomyVAS neck pain scoresPatient-reported outcome measuresSignificant cervical stenosisSymptomatic cervical stenosisVAS neck painIndependent risk factorPostoperative complication rateWorse postoperative outcomesBody mass indexStandard deviation ageMajor academic medical centerHistory of depressionAcademic medical centerPreoperative painNeurological sequelaePain scoresPostoperative outcomes