Featured Publications
Effect of Physician Gender and Race on Simulated Patients’ Ratings and Confidence in Their Physicians
Solnick RE, Peyton K, Kraft-Todd G, Safdar B. Effect of Physician Gender and Race on Simulated Patients’ Ratings and Confidence in Their Physicians. JAMA Network Open 2020, 3: e1920511. PMID: 32083686, PMCID: PMC7043197, DOI: 10.1001/jamanetworkopen.2019.20511.Peer-Reviewed Original ResearchConceptsWhite male physiciansPatient satisfactionPhysician genderMale physiciansHistory of cancerAbdominal surgical proceduresEmergency department physiciansLower patient satisfactionSignificant differencesOnline symptom checkersBlack physiciansComposite outcomeControl physiciansPhysician diagnosisPatient evaluationDepartment physiciansPatient ratingsSurgical proceduresMAIN OUTCOMEPhysician confidenceClinical diagnosisPhysiciansWhite womenDiagnosisWhite menAssociation of renalase with clinical outcomes in hospitalized patients with COVID-19
Safdar B, Wang M, Guo X, Cha C, Chun HJ, Deng Y, Dziura J, El-Khoury JM, Gorelick F, Ko AI, Lee AI, Safirstein R, Simonov M, Zhou B, Desir GV. Association of renalase with clinical outcomes in hospitalized patients with COVID-19. PLOS ONE 2022, 17: e0264178. PMID: 35259186, PMCID: PMC8903289, DOI: 10.1371/journal.pone.0264178.Peer-Reviewed Original ResearchConceptsCOVID-19 patientsRenalase levelsIntensive care unit admissionHospitalized COVID-19 patientsMean age 64 yearsCOVID-19Cox proportional hazards modelCare unit admissionPrimary composite outcomeRetrospective cohort studyUse of vasopressorsSevere COVID-19IL-6 levelsAge 64 yearsRisk of deathCOVID-19 subjectsInitial disease severityProportional hazards modelCOVID-19 diseasePlasma renalaseUnit admissionICU admissionCohort studyComposite outcomeCytokine levelsIs microvascular dysfunction a systemic disorder with common biomarkers found in the heart, brain, and kidneys? — A scoping review
Nowroozpoor A, Gutterman D, Safdar B. Is microvascular dysfunction a systemic disorder with common biomarkers found in the heart, brain, and kidneys? — A scoping review. Microvascular Research 2020, 134: 104123. PMID: 33333140, DOI: 10.1016/j.mvr.2020.104123.Peer-Reviewed Original ResearchConceptsMicrovascular dysfunctionUnderlying systemic processC-reactive proteinLow-density cholesterolMulti-system involvementUric acidDifferent disease entitiesMulti-system manifestationsVon Willebrand factorNT-proBNPEndothelial dysfunctionTotal cholesterolClinical evidenceImmune activationSystemic disordersVitamin DIL-6Asymmetric dimethylarginineBlood biomarkersInforms cliniciansDisease entityCystatin CVital organsDysfunctionCommon biomarkersElevated renalase levels in patients with acute coronary microvascular dysfunction – A possible biomarker for ischemia
Safdar B, Guo X, Johnson C, D'Onofrio G, Dziura J, Sinusas AJ, Testani J, Rao V, Desir G. Elevated renalase levels in patients with acute coronary microvascular dysfunction – A possible biomarker for ischemia. International Journal Of Cardiology 2019, 279: 155-161. PMID: 30630613, PMCID: PMC6482834, DOI: 10.1016/j.ijcard.2018.12.061.Peer-Reviewed Original ResearchConceptsCoronary microvascular dysfunctionFramingham risk scorePET/CTChest painInflammatory markersMicrovascular dysfunctionEmergency departmentRisk scoreRb-82 PET/CTElevated renalase levelsAcute chest painCoronary artery diseaseC-reactive proteinVascular endothelial growth factorAnti-inflammatory proteinTumor necrosis factorEndothelial growth factorAngina historyCMD diagnosisRenalase levelsHypertensive crisisED presentationsHemodynamic instabilityArtery diseaseHeart failureSex Differences in the Presentation and Perception of Symptoms Among Young Patients With Myocardial Infarction
Lichtman JH, Leifheit EC, Safdar B, Bao H, Krumholz HM, Lorenze NP, Daneshvar M, Spertus JA, D'Onofrio G. Sex Differences in the Presentation and Perception of Symptoms Among Young Patients With Myocardial Infarction. Circulation 2018, 137: 781-790. PMID: 29459463, PMCID: PMC5822747, DOI: 10.1161/circulationaha.117.031650.Peer-Reviewed Original ResearchConceptsAcute myocardial infarctionPerception of symptomsChest painCare-seeking behaviorSymptom presentationYounger patientsMyocardial infarctionST-segment elevation acute myocardial infarctionMultivariable hierarchical logistic regressionIndex AMI hospitalizationMajority of womenHierarchical logistic regressionStress/anxietyVIRGO StudyMuscle painPatient characteristicsPredominant symptomAMI symptomsPerceive symptomsProdromal symptomsPatient interviewsHeart diseasePainAMI hospitalizationUS hospitalsPrevalence and characteristics of coronary microvascular dysfunction among chest pain patients in the emergency department
Safdar B, D’Onofrio G, Dziura J, Russell RR, Johnson C, Sinusas AJ. Prevalence and characteristics of coronary microvascular dysfunction among chest pain patients in the emergency department. European Heart Journal Acute Cardiovascular Care 2018, 9: 5-13. PMID: 29543037, DOI: 10.1177/2048872618764418.Peer-Reviewed Original ResearchConceptsCoronary microvascular dysfunctionCoronary artery diseaseCardiac positron emission tomography/Positron emission tomography/Chest pain patientsArtery diseaseAcute myocardial infarctionEmission tomography/Chest painMyocardial infarctionMicrovascular dysfunctionPain patientsEmergency departmentTomography/General emergency department populationLower coronary flow reserveNon-obstructive coronary arteriesPrior emergency department visitsTraditional cardiac risk factorsCardiac risk factorsModerate-risk patientsEmergency department visitsEmergency department patientsCoronary flow reserveEmergency department populationPresentation, Clinical Profile, and Prognosis of Young Patients With Myocardial Infarction With Nonobstructive Coronary Arteries (MINOCA): Results From the VIRGO Study
Safdar B, Spatz ES, Dreyer RP, Beltrame JF, Lichtman JH, Spertus JA, Reynolds HR, Geda M, Bueno H, Dziura JD, Krumholz HM, D'Onofrio G. Presentation, Clinical Profile, and Prognosis of Young Patients With Myocardial Infarction With Nonobstructive Coronary Arteries (MINOCA): Results From the VIRGO Study. Journal Of The American Heart Association 2018, 7: e009174. PMID: 29954744, PMCID: PMC6064896, DOI: 10.1161/jaha.118.009174.Peer-Reviewed Original ResearchConceptsMI-CAD patientsNonobstructive coronary arteriesMI-CADYounger patientsClinical profileCoronary arteryMyocardial infarctionTraditional cardiac risk factorsAcute myocardial infarction patientsCardiac risk factorsGestational diabetes mellitusMyocardial infarction patientsTimes higher oddsMINOCA patientsSAQ qualityVIRGO StudyClinical characteristicsHypercoaguable stateDiabetes mellitusObstructive diseaseClinical outcomesInfarction patientsRisk factorsMINOCAPsychosocial status
2024
Severity of Respiratory Syncytial Virus vs COVID-19 and Influenza Among Hospitalized US Adults
Surie D, Yuengling K, DeCuir J, Zhu Y, Lauring A, Gaglani M, Ghamande S, Peltan I, Brown S, Ginde A, Martinez A, Mohr N, Gibbs K, Hager D, Ali H, Prekker M, Gong M, Mohamed A, Johnson N, Srinivasan V, Steingrub J, Leis A, Khan A, Hough C, Bender W, Duggal A, Bendall E, Wilson J, Qadir N, Chang S, Mallow C, Kwon J, Exline M, Shapiro N, Columbus C, Vaughn I, Ramesh M, Mosier J, Safdar B, Casey J, Talbot H, Rice T, Halasa N, Chappell J, Grijalva C, Baughman A, Womack K, Swan S, Johnson C, Lwin C, Lewis N, Ellington S, McMorrow M, Martin E, Self W. Severity of Respiratory Syncytial Virus vs COVID-19 and Influenza Among Hospitalized US Adults. JAMA Network Open 2024, 7: e244954. PMID: 38573635, PMCID: PMC11192181, DOI: 10.1001/jamanetworkopen.2024.4954.Peer-Reviewed Original ResearchConceptsInvasive mechanical ventilationRespiratory syncytial virusSeverity of RSV diseaseInfluenza diseaseVaccinated patientsIn-hospital deathUnvaccinated patientsRSV diseaseSyncytial virusClinical decision-makingComposite of invasive mechanical ventilationOutcome of invasive mechanical ventilationSeverity of respiratory syncytial virusLaboratory-confirmed respiratory syncytial virusHospitalized US adultsInfluenza vaccination statusVaccination statusAcute respiratory illnessMultivariate logistic regressionCenters for Disease Control and PreventionSeverity of COVID-19Disease Control and PreventionInfluenza infectionInfluenza severityClinical outcomes
2023
Identification of White Matter Hyperintensities in Routine Emergency Department Visits Using Portable Bedside Magnetic Resonance Imaging
de Havenon A, Parasuram N, Crawford A, Mazurek M, Chavva I, Yadlapalli V, Iglesias J, Rosen M, Falcone G, Payabvash S, Sze G, Sharma R, Schiff S, Safdar B, Wira C, Kimberly W, Sheth K. Identification of White Matter Hyperintensities in Routine Emergency Department Visits Using Portable Bedside Magnetic Resonance Imaging. Journal Of The American Heart Association 2023, 12: e029242. PMID: 37218590, PMCID: PMC10381997, DOI: 10.1161/jaha.122.029242.Peer-Reviewed Original ResearchConceptsWhite matter hyperintensitiesMagnetic resonance imagingSevere white matter hyperintensitiesConventional magnetic resonance imagingResonance imagingRetrospective cohortEmergency departmentMatter hyperintensitiesVascular risk factorsProspective observational studyVascular cognitive impairmentTesla magnetic resonance imagingArea Deprivation IndexProspective cohortAdult patientsAcute careRisk factorsCardiovascular diseaseObservational studyCognitive impairmentPatientsCare magnetic resonance imagingIntermodality agreementCohortDeprivation indexRenin-Angiotensin System Modulation With Synthetic Angiotensin (1-7) and Angiotensin II Type 1 Receptor–Biased Ligand in Adults With COVID-19
Self W, Shotwell M, Gibbs K, de Wit M, Files D, Harkins M, Hudock K, Merck L, Moskowitz A, Apodaca K, Barksdale A, Safdar B, Javaheri A, Sturek J, Schrager H, Iovine N, Tiffany B, Douglas I, Levitt J, Busse L, Ginde A, Brown S, Hager D, Boyle K, Duggal A, Khan A, Lanspa M, Chen P, Puskarich M, Vonderhaar D, Venkateshaiah L, Gentile N, Rosenberg Y, Troendle J, Bistran-Hall A, DeClercq J, Lavieri R, Joly M, Orr M, Pulley J, Rice T, Schildcrout J, Semler M, Wang L, Bernard G, Collins S, Becker R, del Zoppo G, Henke P, Holubkov R, Johnson M, Kerr K, Lipman H, Lurie F, Pitt B, Vesely S, Fleg J, Aamodt D, Ayers J, Clark D, Collins J, Cook M, Dixon S, Graves J, Jordan C, Lindsell C, Lopez I, McKeel D, Orozco D, Prato N, Qi A, Qutab M, Stoughton C, Vermillion K, Walsh K, Winchell S, Young T, Franklin R, Wagner E, Walther T, Demitrack M, Johnson J, Walsh R, Bales B, Miller K, Torr D, Barot H, Landreth L, LaRose M, Parks L, Teixeira J, Cardenas S, Ceniceros J, Cunningham A, Kunkel S, Lovato D, Zimmerman B, Nguyen T, Zeger W, Nichols H, Wiedel N, Javaheri A, Stilinovic S, Brokowski C, Lu J, Solberg M, Lee D, Roach K, Tiffany B, Tanner C, Taylor A, Zumbahl J, Syed A, Mason J, Jackson P, Coleman R, Haughey H, Cherabuddi K, James N, Wakeman R, Duncan C, Montero C, Rogers A, Wilson J, Vojnik R, Perez C, Wyles D, Hiller T, Oakes J, Garcia A, Gong M, Mohamed A, Andrea L, Nair R, Nkemdirim W, Lopez B, Boujid S, Torres M, Garcia O, Martinez F, Baduashvili A, Bastman J, Chauhan L, Douin D, Finck L, Licursi A, ten Lohuis C, Zhang S, Bender W, Tovar S, Hayes S, Kurtzman N, Rosseto E, Scaffidi D, Shapiro N, Pak J, Allada G, Briceno G, Peña J, Oh M, Ali H, Beselman S, Eby Y, Klimov V, Hite R, Tanzeem H, Droege C, Winter J, Jackman S, Caudill A, Bayoumi E, Pascual E, Chen P, Mucha S, Thiruchelvam N, Siuba M, Mehkri O, Driver B, Hendrickson A, Kaus O, Ontiveros C, Riehm A, Laudun S, Hudock D, Ensley C, Shaner V, Gentile N, Isenberg D, Reimer H, Cincola P, Harris E, Callahan S, Yamane M, Barrios M, Desai N, Bharara A, Keller M, Majumder P, Dohe C, D’Armiento J, Goldklang M, Wagener G, Fonseca L, Valezquez-Sanchez I, Johnson N, Petersen E, Fuentes M, Newton M, Gundel S, Srinivasan V, Steel T, Robinson B. Renin-Angiotensin System Modulation With Synthetic Angiotensin (1-7) and Angiotensin II Type 1 Receptor–Biased Ligand in Adults With COVID-19. JAMA 2023, 329: 1170-1182. PMID: 37039791, PMCID: PMC10091180, DOI: 10.1001/jama.2023.3546.Peer-Reviewed Original ResearchConceptsAngiotensin II type 1 receptorII type 1 receptorRenin-angiotensin systemSevere COVID-19Type 1 receptorCause mortalityRAS agentsRAS modulationPlacebo groupAngiotensin IIIntravenous infusionOdds ratioSafety outcomesCOVID-19Renin-angiotensin system modulationSARS-CoV-2 infectionAcute COVID-19Key secondary outcomesAction of angiotensinKidney replacement therapySupplemental oxygen useCOVID-19 pathophysiologyContinuous intravenous infusionLast followSecondary outcomes
2022
Health status outcomes after spontaneous coronary artery dissection and comparison with other acute myocardial infarction: The VIRGO experience
Murugiah K, Chen L, Dreyer RP, Bouras G, Safdar B, Khera R, Lu Y, Spatz ES, Ng VG, Gupta A, Bueno H, Tweet MS, Spertus JA, Hayes SN, Lansky A, Krumholz HM. Health status outcomes after spontaneous coronary artery dissection and comparison with other acute myocardial infarction: The VIRGO experience. PLOS ONE 2022, 17: e0265624. PMID: 35320296, PMCID: PMC8942215, DOI: 10.1371/journal.pone.0265624.Peer-Reviewed Original ResearchConceptsSpontaneous coronary artery dissectionAcute myocardial infarctionAMI patientsCoronary artery dissectionYoung AMI patientsHealth status outcomesHealth status instrumentsSCAD patientsArtery dissectionMyocardial infarctionStatus outcomesPatientsOutcomesHousehold incomeCollege educationInfarction
2021
Use of peripheral arterial tonometry in detection of abnormal coronary flow reserve
Gaeta M, Nowroozpoor A, Dziura J, D'Onofrio G, Sinusas AJ, Safdar B. Use of peripheral arterial tonometry in detection of abnormal coronary flow reserve. Microvascular Research 2021, 138: 104223. PMID: 34256085, PMCID: PMC10227886, DOI: 10.1016/j.mvr.2021.104223.Peer-Reviewed Original ResearchConceptsLower coronary flow reserveCoronary flow reserveCoronary microvascular dysfunctionCoronary artery diseaseClinical screening toolPET/CTFlow reserveRubidium-82 positron emission tomography/Large vessel coronary artery diseaseNormal coronary flow reserveTraditional CAD risk factorsVessel coronary artery diseaseAbnormal coronary flow reservePositron emission tomography/Screening toolPeripheral arterial tonometryCAD risk factorsEmission tomography/Presence of calcificationLower RHIHyperemia indexArterial tonometryMicrovascular dysfunctionArtery diseaseAugmentation index
2020
National Trends in Emergency Department Care Processes for Acute Myocardial Infarction in the United States, 2005 to 2015
Pendyal A, Rothenberg C, Scofi JE, Krumholz HM, Safdar B, Dreyer RP, Venkatesh AK. National Trends in Emergency Department Care Processes for Acute Myocardial Infarction in the United States, 2005 to 2015. Journal Of The American Heart Association 2020, 9: e017208. PMID: 33047624, PMCID: PMC7763391, DOI: 10.1161/jaha.120.017208.Peer-Reviewed Original ResearchConceptsST-segment elevation myocardial infarctionAcute myocardial infarctionMedian ED lengthUS emergency departmentsEmergency departmentED visitsMyocardial infarctionED administrationED lengthAMI careNational Hospital Ambulatory Medical Care SurveyCare processesAmbulatory Medical Care SurveyEvidence-based medicationsNonaspirin antiplatelet agentsEarly invasive strategyAnnual ED visitsRegionalization of careED care processesReal-world trendsAntiplatelet therapyAnnual incidenceAntiplatelet agentsYearly incidenceCare SurveyRelationship Between Depressive Symptoms and Health Status in Peripheral Artery Disease: Role of Sex Differences
Jelani Q, Mena‐Hurtado C, Burg M, Soufer R, Gosch K, Jones PG, Spertus JA, Safdar B, Smolderen KG. Relationship Between Depressive Symptoms and Health Status in Peripheral Artery Disease: Role of Sex Differences. Journal Of The American Heart Association 2020, 9: e014583. PMID: 32781883, PMCID: PMC7660812, DOI: 10.1161/jaha.119.014583.Peer-Reviewed Original ResearchConceptsPeripheral artery diseaseDepressive symptomsHealth statusArtery diseaseEQ-5D visual analog scale scoresEQ-5D visual analog scaleVisual analog scale scoreGeneric health statusPeripheral Artery QuestionnaireVascular specialty clinicsAnalog scale scoreHealth status scoresPatient Health QuestionnaireSevere depressive symptomsVisual analog scaleHealth status outcomesWorse health statusAdjusted general linear modelSex differencesPORTRAIT registryPAD diagnosisPAD symptomsAnalog scaleConclusions WomenMean ageUtility of discovery approach using proteomics to create a biomarker profile for coronary microvascular dysfunction
Nowroozpoor A, Gutterman D, Safdar B. Utility of discovery approach using proteomics to create a biomarker profile for coronary microvascular dysfunction. Microvascular Research 2020, 129: 103985. PMID: 32007502, PMCID: PMC10291513, DOI: 10.1016/j.mvr.2020.103985.Peer-Reviewed Original ResearchConceptsCoronary microvascular dysfunctionCoronary flow reserveMicrovascular dysfunctionNormal coronary flow reservePositron emission tomography/Beta-blocker useAcute myocardial infarctionEmission tomography/Regional perfusion defectsSerum proteinsBaseline characteristicsCoronary calcificationMyocardial infarctionTomography/Perfusion defectsCMD patientsFlow reserveSerial measurementsBiomarker profilesAdvanced imagingPatientsPotential biomarkersPotential protein biomarkersSerum samplesObservation unit
2017
Ranolazine and Microvascular Angina by PET in the Emergency Department: Results From a Pilot Randomized Controlled Trial
Safdar B, D’Onofrio G, Dziura J, Russell RR, Johnson C, Sinusas AJ. Ranolazine and Microvascular Angina by PET in the Emergency Department: Results From a Pilot Randomized Controlled Trial. Clinical Therapeutics 2017, 39: 55-63. PMID: 28081848, PMCID: PMC10345862, DOI: 10.1016/j.clinthera.2016.12.002.Peer-Reviewed Original ResearchConceptsCoronary microvascular dysfunctionCoronary flow reserveCoronary artery diseaseChest painSymptomatic patientsArtery diseasePrimary outcomeEmergency departmentNonobstructive coronary artery diseaseRb-82 positron emission tomographyEffect of ranolazineRate-pressure productEmergency department patientsQTc-prolonging drugsRobust clinical trialsPositron emission tomographyHypertensive urgencyMicrovascular anginaMicrovascular dysfunctionUnderdiagnosed causeControlled TrialsDepartment patientsHeart failureAcute symptomsPressure product
2016
Women and Chest Pain: Recognizing the Different Faces of Angina in the Emergency Department.
Safdar B, D'Onofrio G. Women and Chest Pain: Recognizing the Different Faces of Angina in the Emergency Department. The Yale Journal Of Biology And Medicine 2016, 89: 227-38. PMID: 27354848, PMCID: PMC4918863.Peer-Reviewed Original ResearchConceptsCoronary artery diseaseAcute coronary syndromeChest painEmergency departmentMicrovascular dysfunctionED patientsCoronary artery endothelial dysfunctionCause of anginaCoronary artery dissectionCoronary artery spasmPersistent chest painRecurrent chest painSex-specific causesQuality of lifeArtery spasmArtery dissectionCoronary syndromeEndothelial dysfunctionMyocardial bridgingArtery diseasePoor functionCardinal symptomsAnginaPainPatientsMicrovascular Dysfunction as Opposed to Conduit Artery Disease Explains Sex-specific Chest Pain in Emergency Department Patients With Low to Moderate Cardiac Risk
Safdar B, Ali A, D’Onofrio G, Katz SD. Microvascular Dysfunction as Opposed to Conduit Artery Disease Explains Sex-specific Chest Pain in Emergency Department Patients With Low to Moderate Cardiac Risk. Clinical Therapeutics 2016, 38: 240-255.e1. PMID: 26778090, DOI: 10.1016/j.clinthera.2015.12.010.Peer-Reviewed Original ResearchConceptsChest painControl subjectsMicrovascular dysfunctionArtery diseaseObstructive coronary artery diseaseCommon emergency department presentationConduit vessel functionCoronary artery vasomotionTransient forearm ischemiaAcute chest painCardiac risk factorsPersistent chest painAcute coronary syndromeBrachial artery diameterFramingham risk scoreProspective cohort studyChest pain centerSystolic blood pressureAsymptomatic healthy volunteersCoronary artery diseaseEmergency department presentationsBrachial artery reactivityPeripheral microvascular dysfunctionHigh-resolution ultrasoundArtery dysfunction
2015
Sex Differences in Reperfusion in Young Patients With ST-Segment–Elevation Myocardial Infarction
D'Onofrio G, Safdar B, Lichtman JH, Strait KM, Dreyer RP, Geda M, Spertus JA, Krumholz HM. Sex Differences in Reperfusion in Young Patients With ST-Segment–Elevation Myocardial Infarction. Circulation 2015, 131: 1324-1332. PMID: 25792558, PMCID: PMC4652789, DOI: 10.1161/circulationaha.114.012293.Peer-Reviewed Original ResearchConceptsST-segment elevation myocardial infarctionMyocardial infarctionReperfusion therapyAcute ST-segment elevation myocardial infarctionProspective observational cohort studyYoung AMI Patients (VIRGO) studyTime guidelinesYoung womenObservational cohort studyProportion of patientsElevation myocardial infarctionPercutaneous coronary interventionYears of ageSex differencesPatients 18Reperfusion strategyCohort studyCoronary interventionFibrinolytic therapyNeedle timeYounger patientsReperfusion delayRatio of womenReperfusion guidelinesSex disparities
2014
Differential Survival for Men and Women from Out‐of‐hospital Cardiac Arrest Varies by Age: Results from the OPALS Study
Safdar B, Stolz U, Stiell IG, Cone DC, Bobrow BJ, deBoehr M, Dreyer J, Maloney J, Spaite DW. Differential Survival for Men and Women from Out‐of‐hospital Cardiac Arrest Varies by Age: Results from the OPALS Study. Academic Emergency Medicine 2014, 21: 1503-1511. PMID: 25491713, DOI: 10.1111/acem.12540.Peer-Reviewed Original ResearchMeSH KeywordsAge FactorsAgedAged, 80 and overArrhythmias, CardiacCardiopulmonary ResuscitationElectric CountershockEmergency Medical ServicesFemaleGender IdentityHumansMaleMiddle AgedOdds RatioOntarioOut-of-Hospital Cardiac ArrestRegression AnalysisRisk FactorsSex CharacteristicsSex FactorsSurvival AnalysisSurvival RateTime FactorsConceptsHospital dischargeEmergency medical servicesProbability of survivalOHCA patientsOPAL studyInitial ventricular fibrillation/ventricular tachycardia rhythmMultivariable logistic regression modelAge 47 yearsAge 65 yearsHospital cardiac arrestSex-stratified regression modelsPrimary risk factorRegression modelsLogistic regression modelsFractional polynomialsOHCA populationHospital admissionSpontaneous circulationAdult OHCACardiac arrestRapid defibrillationLife Support ProgramRisk factorsFavorable outcomeOHCA survival