-There is increasing emphasis on prevention of emergency medical readmissions. The broad pattern of acute medical readmissions was studied over a seven-year period and the impact of any readmission on 30-day mortality was recorded. Significant predictors of outcome, including co-morbidity and illness severity score, were entered into a multivariate regression model, adjusting the univariate estimates of the readmission status on mortality. In total, 23,114 consecutive acute medical patients were admitted between 2002-8; the overall readmission rate was 27%. Readmission independently predicted an increased 30-day mortality; the odds ratio, was 1.12 (95% confidence interval (CI) 1.09 to 1.14). This fell to 1.05 (95% CI 1.02 to 1.08) when adjusted for outcome predictors including acute illness severity. The trend for readmissions was to progressively increase over time; the median times between consecutive admissions formed an exponential time series. Efforts to reduce or avoid readmissions may depend on an ability to modify the underlying chronic disease.KEY WORDS: chronic disease, hospital mortality, length of stay, medical admission, readmission
IntroductionThere has been an increasing trend of emergency medical admissions in recent decades. 1-2 Similar systems for managing acute medical admissions exist across the UK and Ireland. After discharge from hospital, unplanned readmission is relatively common, with reported rates of 15.1% at 28 days from North East Thames, 3 38% at six months in London, 4 and 19.5% at one year from the west of Ireland. 5 The rising trend in emergency readmissions is worrying, partly because of implied implications about quality of care, but also because of the burden placed on the provision of acute hospital services. The cost savings associated with shortened hospital stay are lost when patients are re-hospitalised.There is great interest in the concept of the 'avoidable' readmission; many are said to cluster close to the first few weeks after an index discharge. 6 Although some medical readmissions can be ascribed to factors, such as suboptimal healthcare delivery or lack of social supports, many patient-or disease-related factors also have an impact. 7 The hypothesis that many readmissions are preventable is not established and the contribution of fresh events, in patients with chronic illness and frequent co-morbidity, must be considered. The use of readmissions as a benchmark of quality is controversial; it may be a poor guide to quality of care without correction for medical, social and demographic factors. 8 Many studies are of limited duration with very little data on the mortality among readmitted patients. In an attempt to address some of these questions from a longer-term perspective the pattern of admissions to St James's Hospital Dublin, were examined. A 'readmission' was defined as any emergency medical readmission in the seven years from beginning of 2002 to end of 2008.
Methods
BackgroundSt James's Hospital (SJH) operates a continuous sectorised acute general ...