2001
Risk adjustment for older hospitalized persons A comparison of two methods of data collection for the Charlson index
van Doorn C, Bogardus S, Williams C, Concato J, Towle V, Inouye S. Risk adjustment for older hospitalized persons A comparison of two methods of data collection for the Charlson index. Journal Of Clinical Epidemiology 2001, 54: 694-701. PMID: 11438410, DOI: 10.1016/s0895-4356(00)00367-x.Peer-Reviewed Original ResearchConceptsICD-9 dataCharlson indexMortality predictionComorbid conditionsOlder general medical patientsYale-New Haven HospitalRisk adjustmentOriginal Charlson indexSpecific comorbid conditionsGeneral medical patientsGeneral medicine wardsHospital admission dateCharlson scoreIndividual comorbiditiesConsecutive patientsMedicine wardsClinical evidenceMedical patientsAdmission dateChart-based dataMortality riskICD-9PatientsChart dataLow agreement
1996
Factors associated with successful implantation of nonthoracotomy defibrillation lead systems
Schwartzman D, Concato J, Ren J, Callans D, Gottlieb C, Preminger M, Marchlinski F. Factors associated with successful implantation of nonthoracotomy defibrillation lead systems. American Heart Journal 1996, 131: 1127-1136. PMID: 8644591, DOI: 10.1016/s0002-8703(96)90087-3.Peer-Reviewed Original ResearchConceptsNonthoracotomy defibrillation lead systemsDefibrillation lead systemsClinical factorsDefibrillation thresholdImplantation failureBiphasic shock waveformLead-related factorsShock waveformHigh defibrillation thresholdMonophasic shock waveformsLower defibrillation thresholdLead systemMonophasic groupConsecutive patientsBiphasic groupIncidence of successEndovascular SystemPatientsSuccessful implantationIncidenceImplantationFailureFactorsGroup