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Derivation and validation of an index to predict early death or unplanned readmission after discharge from hospital to the community
Background: Readmissions to hospital are common, costly and often preventable. An easy-to-use index to quantify the risk of readmission or death after discharge from hospital would help cliniciansExpand
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A Modification of the Elixhauser Comorbidity Measures Into a Point System for Hospital Death Using Administrative Data
Background:Comorbidity measures are necessary to describe patient populations and adjust for confounding. In direct comparisons, studies have found the Elixhauser comorbidity system to beExpand
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Selecting Patients With Atrial Fibrillation for Anticoagulation: Stroke Risk Stratification in Patients Taking Aspirin
Background—The rate of stroke in atrial fibrillation (AF) depends on the presence of comorbid conditions and the use of antithrombotic therapy. Although adjusted-dose warfarin is superior to aspirinExpand
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Effect of study setting on anticoagulation control: a systematic review and metaregression.
BACKGROUND For patients receiving therapy with oral anticoagulants (OACs), the proportion of time spent in the therapeutic range (ie, anticoagulation control) is strongly associated with bleeding andExpand
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Proportion of hospital readmissions deemed avoidable: a systematic review
Background Readmissions to hospital are increasingly being used as an indicator of quality of care. However, this approach is valid only when we know what proportion of readmissions are avoidable. WeExpand
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Oral anticoagulants vs aspirin in nonvalvular atrial fibrillation: an individual patient meta-analysis.
CONTEXT Patients with nonvalvular atrial fibrillation (AF) have an increased risk of stroke and other vascular events. OBJECTIVE To compare the risk of vascular and bleeding events in patients withExpand
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Predicting the risk of unplanned readmission or death within 30 days of discharge after a heart failure hospitalization.
BACKGROUND The accuracy of current models to predict the risk of unplanned readmission or death after a heart failure (HF) hospitalization is uncertain. METHODS We linked four administrativeExpand
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Effect of Age on Stroke Prevention Therapy in Patients With Atrial Fibrillation: The Atrial Fibrillation Investigators
Background and Purpose— Stroke risk increases with age in patients who have nonvalvular atrial fibrillation. It is uncertain whether the efficacy of stroke prevention therapies in atrial fibrillationExpand
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Time-dependent bias was common in survival analyses published in leading clinical journals.
OBJECTIVE In survival analysis, "baseline immeasurable" time-dependent factors cannot be recorded at baseline, and change value after patient observation starts. Time-dependent bias can occur if suchExpand
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Maternal age and risk of stillbirth: a systematic review
Background: The number of women who delay childbirth to their late 30s and beyond has increased significantly over the past several decades. Studies regarding the relation between older maternal ageExpand
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