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Generalizability of guidelines and physicians' adherence. Case study on the Sixth Joint National Commitee's
Claudio Pedone1, Kate L Lapane
1Centro di Medicina dell'Invecchiamento, Università Cattolica del Sacro Cuore. Roma, Italia. claudio_pedone@rm.unicatt.it
Insights
Physicians showed poor adherence to hypertension guidelines, with only 69% following recommendations. Guideline generalizability to the broader population was weak, suggesting patient characteristics impact treatment decisions.
Area of Science:
- Cardiology
- Clinical Practice Guidelines
- Hypertension Management
Background:
- Clinical practice guidelines (CPG) aim to improve healthcare efficiency and outcomes.
- Physician adherence to CPG is often suboptimal.
- This study investigates the link between hypertension guideline generalizability and physician adherence to treatment recommendations.
Purpose of the Study:
- To evaluate the relationship between the generalizability of hypertension guidelines and physician adherence.
- To assess how well clinical trial populations represent the general hypertensive population.
- To identify factors influencing physician adherence to hypertension treatment guidelines.
Main Methods:
- Utilized the Sixth Joint National Committee (JNC VI) hypertension guidelines.
- Compared evidence from clinical trials underpinning JNC VI recommendations with the American hypertensive population (NHANES III data).
- Assessed physician adherence rates to CPG for pharmacological hypertension treatment.
Main Results:
- 11% of the NHANES population required drug treatment per JNC VI guidelines.
- Only 50% of the treated population would have met criteria for inclusion in at least two clinical trials.
- Physician adherence to CPG was 69%, with a weak association between guideline generalizability and adherence; baseline risk was the primary treatment determinant.
Conclusions:
- JNC VI hypertension guidelines may lack generalizability to the target patient population.
- Physician adherence to hypertension CPG was relatively poor.
- Failure to fully consider patient clinical characteristics may contribute to low guideline adherence.
Background:
Clinical practice guidelines (CPG) are thought to be an effective tool in improving efficiency and outcomes of clinical practice. Physicians' adherence to guidelines is reported to be poor. We evaluated the relationship between generalizability of guidelines on hypertension and physicians' adherence to guidelines' recommendations for pharmacological treatment.
Methods:
We used the Sixth Joint National Committee's (JNC VI) guidelines on hypertension to evaluate our hypothesis. We evaluated the evidence from controlled clinical trials on which the JNC VI bases its recommendation, and compared the population enrolled in those trials with the American hypertensive population. Data on this population came from the National Health and Nutritional Examination Survey III.
Results:
Twenty-three percent of the NHANES population had a diagnosis of hypertension, 11% had hypertension requiring drug treatment according to the JNC VI. Only half of the population requiring treatment would have been enrolled in at least two trials. Rate of adherence to CPG was 69%. We found a weak association between generalizability and physicians' adherence to guidelines. Baseline risk was the major determinant of the decision to treat.
Conclusion:
JNC VI guidelines may not be generalizable to their target population. We found a relatively poor adherence rate to these guidelines. Failing of completely taking into account the clinical characteristics of the patients may be partly responsible for this lack of adherence.