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A baseline profile of the Queensland Cardiac Record Linkage Cohort (QCard) study
Son Nghiem1, Clifford Afoakwah2, Paul Scuffham2,3
1Centre for Applied Health Economics, Griffith University, 117 Kessels Road, Nathan, Brisbane, QLD, 4111, Australia. s.nghiem@griffith.edu.au.
Insights
Recurrent hospital admissions for cardiovascular disease (CVD) in Australia are linked to higher costs and adverse outcomes. This study analyzed baseline data from the Queensland Cardiac Record Linkage Cohort (QCard) to understand these trends.
Area of Science:
- Public Health
- Epidemiology
- Health Services Research
Background:
- Cardiovascular disease (CVD) is a major cause of mortality in Australia.
- Longitudinal record linkage studies offer potential for improving cardiac care decisions.
- The Queensland Cardiac Record Linkage Cohort (QCard) study provides baseline data.
Purpose of the Study:
- To describe baseline characteristics of the QCard study cohort.
- To investigate factors influencing cardiovascular disease progression using linked administrative health data.
- To compare outcomes and costs between first-time and recurrent hospital admissions for CVD.
Main Methods:
- Utilized International Classification of Disease, 10th Revision Australian Modification (ICD-10-AM) codes to identify CVD and comorbidities.
- Compared costs and adverse health outcomes between first-time and recurrent admissions.
- Analyzed baseline data using descriptive statistics and standard tests.
Main Results:
- The cohort comprised 132,343 hospitalizations in 2010, with 47% being recurrent admissions.
- Recurrent admissions involved older patients (70 vs. 61 years) with a higher prevalence of multiple comorbidities (3.17 vs. 1.59).
- Cardiovascular disease hospitalizations were predominantly in metropolitan areas.
Conclusions:
- Linked administrative health data are effective for studying heart disease progression.
- Recurrent CVD admissions are associated with increased hospital costs.
- Recurrent admissions correlate with a higher risk of adverse health outcomes.
Background:
Cardiovascular disease (CVD) is one of the leading causes of death in Australia. Longitudinal record linkage studies have the potency to influence clinical decision making to improve cardiac health. This paper describes the baseline characteristics of the Queensland Cardiac Record Linkage Cohort study (QCard).
Methods:
International Classification of Disease, 10th Revision Australian Modification (ICD-10-AM) diagnosis codes were used to identify CVD and comorbidities. Cost and adverse health outcomes (e.g., comorbidities, hospital-acquired complications) were compared between first-time and recurrent admissions. Descriptive statistics and standard tests were used to analyse the baseline data.
Results:
There were 132,343 patients with hospitalisations in 2010, of which 47% were recurrent admissions, and 53% were males. There were systematic differences between characteristics of recurrent and first-time hospitalisations. Patients with recurrent episodes were nine years older (70 vs. 61; p < 0.001) and experienced a twice higher risk of multiple comorbidities (3.17 vs. 1.59; p < 0.001). CVD index hospitalisations were concentrated in large metropolitan hospitals.
Conclusions:
Our study demonstrates that linked administrative health data provide an effective tool to investigate factors determining the progress of heart disease. Our main finding suggests that recurrent admissions were associated with higher hospital costs and a higher risk of having adverse outcomes.
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