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 …

Background Numerous studies have tried to determine the association between continuity
and outcomes. Studies doing so must actually measure continuity. If continuity and …

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 …

Background: Studies of hospitalized patients identify safety as a significant problem, but few
data are available regarding injuries occurring after discharge. Patients may be vulnerable …

Background: Comorbidity measures are necessary to describe patient populations and
adjust for confounding. In direct comparisons, studies have found the Elixhauser comorbidity …

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 …

Background: Adverse events (AEs) are adverse outcomes caused by medical care. Several
studies have indicated that a substantial number of patients experience AEs before or during …

OBJECTIVE: To describe the incidence of adverse drug events (ADEs), preventable ADEs,
and ameliorable ADEs occurring after hospital discharge and their associated risk factors …

Emergency department (ED) overcrowding is a common problem. Despite a widespread
belief that low hospital bed availability contributes to ED overcrowding, there are few data …

OBJECTIVE: In survival analysis,“baseline immeasurable” time-dependent factors cannot be
recorded at baseline, and change value after patient observation starts. Time-dependent …