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What constitutes controlled hypertension? Patient based comparison of hypertension guidelines
1Department of Social Medicine, University of Bristol.
Insights
Hypertension guidelines vary significantly, impacting patient classification. Clearer communication of treatment risks and benefits is essential for accurate hypertension management.
Area of Science:
- Cardiology
- Public Health
- Clinical Guidelines
Background:
- Hypertension management relies on clinical guidelines.
- Variations in these guidelines can affect patient care.
Purpose of the Study:
- To quantify the impact of differing hypertension guidelines on patient assessment.
- To identify inconsistencies in hypertension control criteria across international guidelines.
Main Methods:
- Cross-sectional study involving 876 patients with diagnosed hypertension.
- Assessment of hypertension control using guidelines from New Zealand, Canada, the US, Britain, and WHO.
- Analysis of the proportion of patients classified as having controlled hypertension under each guideline set.
Main Results:
- The proportion of patients with controlled hypertension ranged from 17.5% to 84.6% across different guidelines.
- Agreement on patient classification was only achieved for 31% of individuals.
- Specific guideline examples showed potential for unnecessary treatment or denial of beneficial treatment.
Conclusions:
- Significant inconsistencies exist among hypertension management guidelines.
- Guidelines require clearer articulation of absolute benefits and risks associated with treatment decisions.
Objectives:
To investigate and quantify the extent to which variations in guidelines influence assessment of control of hypertension.
Design:
Cross sectional study. Selected patients had hypertension assessed as controlled or uncontrolled with guidelines from New Zealand, Canada, the United States, Britain, and the World Health Organisation.
Setting:
18 general practices in Oxfordshire.
Subjects:
876 patients with diagnosed hypertension and taking antihypertensive drugs.
Main Outcome Measures:
Proportion of patients with controlled hypertension according to each set of guidelines.
Results:
The proportion of patients with controlled hypertension varied from 17.5% to 84.6% with the different guidelines after adjustment for the sampling method. All five sets of guidelines agreed on the classification for 31% (277) of the patients. The New Zealand guidelines calculate an absolute risk of a cardiovascular event. When this was taken as the standard half of the patients with uncontrolled hypertension by the United States criteria would be treated unnecessarily and 31% of those classified as having controlled hypertension by the Canadian guidelines would be denied beneficial treatment.
Conclusions:
Hypertension guidelines are inconsistent in their recommendations and need to make clear the absolute benefits and risks of treatment.