© 2002 European Society of Cardiology
Factors influencing the length of hospital stay of patients with heart failure
a Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland Private Bag 92019, Auckland, New Zealand
b Department of Medicine, Sahlgrenska University Hospital/Östra, Göteborg University Goteborg, Sweden
* Corresponding author. Tel.: +64-9-307-4949x7654; fax: +64-9-302-2101 E-mail address: sp.wright{at}auckland.ac.nz
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Abstract |
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Introduction: Heart failure (HF) is characterised by frequent hospital admissions and prolonged length of hospital stay. Admissions for HF have increased over the last decade while length of stay has decreased; the reasons for this change in length of stay are uncertain. This study investigates the effect of patient-related variables, in-hospital progress and complications on length of stay.
Methods: Patients admitted to Auckland Hospital general medical service and randomised into the Auckland Heart Failure Management Programme were included in this study.
Results: One hundred and ninety-seven patients were included in this study. Mean age 73 years, mean left ventricular ejection fraction 32%; 52% had one or more previous HF admissions and 75% were New York Heart Association class IV at admission. Median length of hospital stay was 6 days (IQR 4, 9) which is comparable to the national average from New Zealand admission databases. Longer than average length of stay, defined as >6 days, was associated with the presence of peripheral congestion, duration of treatment with intravenous diuretic, the development of renal impairment, other acute medical problems at admission, iatrogenic complications during hospital stay, and social problems requiring intervention. Factors independently associated with length of stay in the top quartile (>10 days) on logistic regression included the presence of oedema at admission (OR 10.5), change in weight during stay (OR 1.3), duration of treatment with iv diuretic (OR 7.5), the development of renal impairment (OR 9.8), concurrent respiratory problems requiring specific treatment (OR 3.8), and social problems requiring intervention (OR 6.8).
Conclusions: Peripheral congestion, concomitant acute medical problems requiring specific treatment, the development of renal impairment and the presence of social problems were related to a longer than average length of hospital stay. Multivariate models only partly explained variance in hospital stay, suggesting the importance of pre-admission and post-discharge factors, including the healthcare environment, the availability of primary and secondary care resources, and the threshold for hospital admission.
Key Words: Heart failure • Length of stay • Healthcare use • Hospitalisation • Inpatient management
Received November 6, 2001; Revised July 9, 2002; Accepted October 4, 2002
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