POSTER PRESENTATIONOpen Access Download full-text
Mortality following acute medical hospitalization
in Denmark - a population-based cohort study
Betina Hansen1,3*, Morten Schmidt1, Sussie Antonsen1, Jens Møller2, Carsten Thordal2, Henrik Toft Sørensen1
From Danish Society for Emergency Medicine: Research Symposium 2010
Roskilde, Denmark. 20-21 May 2010
The age of the general population is increasing: It is
estimated that the population aged above 65 years will
increase by 400,000 over the next 30 years. A third of
this increment is comprised by persons older than 80
years. 45% of the general population and 88% of the
population aged above 65 years have at least one
chronic disease. Thus, aging of the population is
expected to cause an increase in morbidity and an
increase in number of hospitalizations. The increasing
number of hospitalizations will therefore involve an
increasing number of patients with more than one
chronic disease. The aim was to examine 1-, 3- and 6-
month mortality after acute medical hospitalization
according to sex, age, and comorbidity.
Using data from the Danish National Registry of
Patients, we conducted a population-based cohort study
including all patients with an admission in 2008 to the
Medical Admission Unit (MAU) at Aarhus University
Hospital-Nørrebrogade. Only first-time admissions were
included. The patients were followed until death, emi-
gration, or 6 months after date of admission using data
from the Civil Registration System. Using discharge
diagnoses registered before 2008, we ascertained comor-
bidity and defined three levels of comorbidity index-
score (low, medium, high). We examined mortality
according to sex, age and comorbidity.
We identified 4,494 patients with a first-time admission
in 2008 to MAU. 3,768 (84%) were classified as acute,
252 (6%) as non-acute, and 474 (11%) were unclassified.
Among the patients with acute admissions, 54% were
women and 45% men. The median age was 63 years for
women and 60 for men. 45% of the patients had a low
comorbidity index-score, 33% had a medium index-
score and 22% had a high index-score. Overall mortality
was 5.5% after 30 days, 9.3% after 90 days, and 12.6%
after 6 months. Mortality of patients older than 80 years
was 13.9%, 23.4%, and 29.5%, respectively. Patients with
the high comorbidity index-score had a mortality of
11.9%, 20.4%, and 26.9%, respectively.
Mortality after admission with an acute medical disease
was strongly associated with age and comorbidity, but
did not vary by sex.
1Department of Clinical Epidemiology, Aarhus University Hospital, Denmark.
2Department of Endocrinology and Internal Medicine, Aarhus University
Hospital-Nørrebrogade, Denmark.3Center of Emergency Medicine Research,
Aarhus University Hospital, Denmark.
Published: 17 September 2010
Cite this article as: Hansen et al.: Mortality following acute medical
hospitalization in Denmark - a population-based cohort study.
Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine 2010
* Correspondence: firstname.lastname@example.org
1Department of Clinical Epidemiology, Aarhus University Hospital, Denmark
Full list of author information is available at the end of the article
Hansen et al. Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine 2010, 18(Suppl 1):P21
© 2010 Hansen et al; licensee BioMed Central Ltd.