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Communicating effectiveness of intervention for chronic diseases: what single format can replace comprehensive
Henrik Stovring1, Dorte Gyrd-Hansen, Ivar S Kristiansen
1Research Unit for General Practice, University of Southern Denmark, Odense, Denmark. hstovring@health.sdu.dk
BMC Medical Informatics and Decision Making
|June 21, 2008
Summary
Absolute risk reduction (ARR) best aligned patient decisions on cardiovascular treatments. While ARR showed the highest concordance, the differences between information formats were minimal, highlighting potential understanding gaps.
Area of Science:
- Cardiology
- Health Communication
- Decision Science
Background:
- General Practitioners (GPs) face challenges conveying cardiovascular disease treatment effectiveness.
- Uncertainty exists regarding optimal methods for presenting treatment efficacy data to patients.
Purpose of the Study:
- To assess decision concordance when patients receive cardiovascular treatment effectiveness information in various formats.
- To compare decisions made using single information formats versus a combined format with pictorial representation.
Main Methods:
- A randomized study of 1,169 participants (aged 40-59) in Denmark.
- Participants were presented with treatment effectiveness data using absolute risk reduction (ARR), relative risk reduction (RRR), number needed to treat (NNT), or prolongation of life (POL).
- Decisions were re-evaluated after presenting all four formats with a pictorial aid.
Main Results:
- Treatment consent rates ranged from 52% to 79% after full information presentation.
- Absolute risk reduction (ARR) demonstrated the highest decision concordance (94%) between initial and final choices.
- No statistically significant superiority was found for ARR over other formats.
Conclusions:
- Decisions informed by ARR showed the best concordance with a comprehensive information set.
- The small differences in concordance across formats suggest potential patient comprehension issues.
- Further research is needed to ensure patients fully understand treatment effectiveness information.
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