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Cardiovascular and non-cardiovascular hospital admissions associated with atrial fibrillation: a Danish nationwide, retrospective cohort study.


ABSTRACT:

Objective

To examine the excess risk of hospitalisation in patients with incident atrial fibrillation (AF).

Design

A nationwide, retrospective cohort study.

Setting

Denmark.

Participants

Data on all admissions in Denmark from 1997 to 2009 were collected from nationwide registries. After exclusion of subjects previously admitted for AF, data on 4 602 264 subjects and 10 779 945 hospital admissions contributed to the study.

Primary and secondary outcome measures

Age-stratified and sex-stratified admission rates were calculated for cardiovascular and non-cardiovascular admissions. Temporal patterns of readmission, relative risk and duration of frequent types of admission were calculated.

Results

Of 10 779 945 hospital admissions, 729 088(6.8%) were associated with AF. Admissions for cardiovascular reasons after 1, 3 and 6 months occurred for 6.0, 14.3 and 28.4% of AF patients versus 0.2, 0.6 and 1.8 of non-AF patients. Admissions for non-cardiovascular reasons after 1, 3 and 6 months comprised 6.8, 16.1 and 33.3% of AF patients and 1.2, 3.2 and 9.7% of non-AF patients. When stratified for age, AF was associated with similar cardiovascular admission rates across all age groups, while non-cardiovascular admission rates were higher in older patients. Within each age group and for both cardiovascular and non-cardiovascular admissions, AF was associated with higher rates of admission. When adjusted for age, sex and time period, patients with AF had a relative risk of 8.6 (95% CI 8.5 to 8.6) for admissions for cardiovascular reasons and 4.0 (95% CI 4.0 to 4.0) for admission for non-cardiovascular reasons.

Conclusions

This study confirms that the burden of AF is considerable and driven by both cardiovascular and non-cardiovascular admissions. These findings underscore the importance of using clinical and pharmacological means to reduce the hospital burden of AF in Western healthcare systems.

SUBMITTER: Christiansen CB 

PROVIDER: S-EPMC3563138 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature

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Publications

Cardiovascular and non-cardiovascular hospital admissions associated with atrial fibrillation: a Danish nationwide, retrospective cohort study.

Christiansen Christine Benn CB   Olesen Jonas Bjerring JB   Gislason Gunnar G   Lock-Hansen Morten M   Torp-Pedersen Christian C  

BMJ open 20130124 1


<h4>Objective</h4>To examine the excess risk of hospitalisation in patients with incident atrial fibrillation (AF).<h4>Design</h4>A nationwide, retrospective cohort study.<h4>Setting</h4>Denmark.<h4>Participants</h4>Data on all admissions in Denmark from 1997 to 2009 were collected from nationwide registries. After exclusion of subjects previously admitted for AF, data on 4 602 264 subjects and 10 779 945 hospital admissions contributed to the study.<h4>Primary and secondary outcome measures</h4  ...[more]

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