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Effect of risk status on treatment criteria. Implications of hypertension trials
1Department of Epidemiology, University of California, San Francisco.
Insights
Individualized hypertension treatment is crucial. Higher risk factors amplify treatment benefits, necessitating lower blood pressure goals for high-risk patients, unlike low-risk individuals.
Area of Science:
- Cardiology
- Clinical Pharmacology
- Public Health
Background:
- Hypertension management requires balancing treatment benefits against adverse effects.
- The multiplicative risk model suggests increased risk factors enhance treatment benefits.
- Current treatment guidelines may not adequately address individual risk stratification.
Purpose of the Study:
- To evaluate the validity of the multiplicative risk model in hypertension treatment.
- To determine if a single treatment threshold is appropriate for all hypertensive patients.
- To advocate for individualized treatment goals based on absolute risk.
Main Methods:
- Analysis of subgroup data from clinical trials on hypertension treatment.
- Application of the multiplicative model to assess the relationship between risk factors and treatment benefit.
- Comparison of treatment thresholds and goals across different patient risk profiles.
Main Results:
- The multiplicative model of risk is generally valid for predicting the absolute benefit of hypertension treatment.
- Adverse effects of hypertension treatment are typically independent of other risk factors.
- A single, population-wide treatment threshold for hypertension is inappropriate due to varying individual risks.
Conclusions:
- Individualized treatment thresholds and goals for hypertension are essential.
- Patients with high absolute risk (e.g., due to prior cardiovascular disease) benefit from lower blood pressure goals (e.g., diastolic blood pressure of 90 mm Hg).
- Low-risk individuals may not require aggressive hypertension management, necessitating tailored therapeutic strategies.
Abstract:
When deciding whether to treat a patient with hypertension, clinicians must balance the benefit of treatment against its adverse effects. In the absence of an interaction, the multiplicative model of risk implies that the absolute benefit of treatment is related to the underlying risk of an adverse outcome. Thus, each additional risk factor multiplies the absolute benefit of treating hypertension. Analyses of data from subgroups in clinical trials of hypertension treatment suggest that this model is usually valid. In contrast, the adverse effects of treatment are usually unrelated to other risk factors. Thus, the cutoff point for treatment differs in different individuals: setting a single treatment threshold and goal for the entire population is not appropriate. Patients who are at high absolute risk because of prior coronary artery disease or other risk factors have a greater potential absolute benefit, and such patients deserve a low threshold and goal, such as a diastolic blood pressure of 90 mm Hg. Conversely, persons at low risk, such as white women without other risk factors, do not require such aggressive management.