Volume 18 Supplement 1

Danish Society for Emergency Medicine: Research Symposium 2010

Open Access

Mortality following acute medical hospitalization in Denmark - a population-based cohort study

  • Betina Hansen1, 3Email author,
  • Morten Schmidt1,
  • Sussie Antonsen1,
  • Jens Møller2,
  • Carsten Thordal2 and
  • Henrik Toft Sørensen1
Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine201018(Suppl 1):P21

DOI: 10.1186/1757-7241-18-S1-P21

Published: 17 September 2010

Background

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.

Methods

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, emigration, or 6 months after date of admission using data from the Civil Registration System. Using discharge diagnoses registered before 2008, we ascertained comorbidity and defined three levels of comorbidity index-score (low, medium, high). We examined mortality according to sex, age and comorbidity.

Results

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.

Conclusion

Mortality after admission with an acute medical disease was strongly associated with age and comorbidity, but did not vary by sex.

Authors’ Affiliations

(1)
Department of Clinical Epidemiology, Aarhus University Hospital
(2)
Department of Endocrinology and Internal Medicine, Aarhus University Hospital-Nørrebrogade
(3)
Center of Emergency Medicine Research, Aarhus University Hospital

Copyright

© Hansen et al; licensee BioMed Central Ltd. 2010

This article is published under license to BioMed Central Ltd.

Advertisement