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Frailty as a Predictor of Short-Term Outcomes for Elderly Patients with non-ST-Elevation Myocardial Infarction (NSTEMI)
Linköping University, Department of Medical and Health Sciences, Health Technology Assessment and Health Economics. Linköping University, Faculty of Health Sciences.
Linköping University, Department of Medical and Health Sciences, Cardiology. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Centre, Department of Cardiology UHL.ORCID iD: 0000-0002-2608-2062
Linköping University, Department of Medical and Health Sciences, Cardiology. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Centre, Department of Cardiology UHL.ORCID iD: 0000-0002-9375-5087
Linköping University, Department of Medical and Health Sciences, Cardiology. Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart and Medicine Centre, Department of Cardiology UHL.
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(English)Manuscript (preprint) (Other academic)
Abstract [en]

Background – For the large and growing population of elderly patients with cardiovascular disease it is important to identify clinically relevant measures of biological age and their contribution to risk. Frailty is an emerging concept in medicine denoting increased vulnerability and decreased physiologic reserves. We analyzed how the variable frailty predicts short-term outcomes for elderly NSTEMI patients.

Methods and Results – Patients, aged 75 years or older, with diagnosed NSTEMI were included at three centers, and clinical data including judgement of frailty were collected prospectively. Frailty was defined according to the Canadian Study of Health and Aging (CSHA) Clinical Frailty Scale (CFS). Of 307 patients, 150 (48.5%) were considered frail. Frail patients were slightly older and presented with a greater burden of comorbidity. By multiple logistic regression, frailty was found to be a strong independent risk factor for inhospital mortality, one-month mortality (OR 3.8, 95% CI 1.3 to 10.8) and the primary composite outcome (OR 2.2, 95% CI 1.3 to 3.7). Particularly frail patients with a high comorbidity burden manifested a markedly increased risk for the primary composite outcome. By multiple linear regression, frailty was identified as a strong independent predictor for prolonged hospital care (frail 13.4 bed days, non-frail 7.5 bed days; P<0.0001).

Conclusions - Frailty is a strong independent predictor of in-hospital mortality, one-month mortality, prolonged hospital care and the primary composite outcome. The combined use of frailty and comorbidity may constitute an ultimate risk prediction concept regarding cardiovascular patients with complex needs.

Keyword [en]
Elderly, frailty, NSTEMI, co-morbidity, outcomes
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-67638OAI: oai:DiVA.org:liu-67638DiVA: diva2:412158
Available from: 2011-04-20 Created: 2011-04-20 Last updated: 2013-09-11Bibliographically approved
In thesis
1. Micro Level Priority Setting for Elderly Patients with Acute Cardiovascular Disease and Complex Needs: Practice What We Preach or Preach What We Practice?
Open this publication in new window or tab >>Micro Level Priority Setting for Elderly Patients with Acute Cardiovascular Disease and Complex Needs: Practice What We Preach or Preach What We Practice?
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Demographic trends and other factors are expected to continue widening the gap between health care demands and available resources, especially in elder services. This growing imbalance signals a need for priority setting in health care. The literature has previously described problems in constructing useable means of priority setting, particularly when evidence is sparse, when patient groups are not satisfactorily defined, when interpretation of the term patient need is unclear, and when uncertainty prevails on how to weigh different ethical values. The chosen study object illustrates these problems. Moreover, the Swedish Government recently stated that care for elderly persons with complex health care needs remains underfunded. The general aim of this thesis is: to study micro-level priority setting for elderly heart patients with complex needs, as illustrated by those with non-ST-elevation myocardial infarction (NSTEMI); to relate the findings to evidence-based priority setting, e.g. guidelines for heart disease; and to analyse how complex needs could be appropriately categorised from a perspective of evidence-based priority setting.

Paper I presents a register study that uses data from the Patient Register to describe inpatient care utilization, costs, and characteristics of elderly patients with multiple diseases. Paper II presents a confidential survey study from a random sample of 400 Swedish cardiologists. Paper III presents a prospective, clinical, observational multicentre-study of elderly patients with myocardial infarction (NSTEMI). Paper IV presents a questionnaire study from a purposeful, stratified sample of Swedish cardiologists.

The results from Paper I show that elderly patients with multiple diseases have extensive and complex needs, frequently manifesting chronic and intermittently acute disease and consuming health care at various levels. A large majority have manifested cardiovascular disease. Results from Paper II indicate that although 81% of cardiologists reported extensive use of national guidelines in their clinical decision-making generally, the individual clinician’s personal clinical experience and the patient’s views were used to a greater extent than national guidelines, when making decisions about elderly multiple-diseased patients. Many elderly heart disease patients with complex needs manifest severe, acute or chronic, comorbid conditions that constitute exclusion criteria in evidence-generating studies, thereby limiting the generalisability of evidence and applicability of guidelines for these patients. This was indicated in papers I-IV. Paper III reports that frailty is a strong independent risk factor for adverse, short-term, clinical outcomes, e.g. one-month mortality for elderly NSTEMI patients. Particularly frail patients with a high comorbidity burden manifested a markedly increased risk.

In the future, prospective clinical studies and registries with few exclusion criteria should be conducted. Consensus-based judgments based on a framework for priority setting as regards elderly patients with complex needs may offer an alternative, estimating the benefitrisk ratio of an intervention and the time-frame of expected benefits in relation to expected life-time. Such a framework, which is tentatively outlined in this thesis, should take into account comorbidity, frailty, and disease-specific risk.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2011. 106 p.
Series
Linköping University Medical Dissertations, ISSN 0345-0082 ; 1240
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-67639 (URN)978-91-7393-188-5 (ISBN)
Public defence
2011-05-13, Berzeliussalen, Campus US, Linköpings universitet, Linköping, 13:00 (Swedish)
Opponent
Supervisors
Available from: 2011-05-11 Created: 2011-04-20 Last updated: 2011-07-05Bibliographically approved

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Ekerstad, NiklasSwahn, EvaJanzon, MagnusAlfredsson, JoakimLindenberger, MarcusCarlsson, Per

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