Generalizable Approach to Quantifying Guideline-Directed Medical Therapy

Area of Science:

• Cardiology
• Pharmacology
• Health Services Research

Background:

• Accurate quantification of guideline-directed medical therapy (GDMT) intensity is crucial for enhancing heart failure (HF) patient care.
• Current methods for measuring GDMT intensity often fail to account for dose intensity or utilize inconsistent weighting systems.

Purpose of the Study:

• To introduce and evaluate the Kansas City Medical Optimization (KCMO) score as a novel measure for quantifying GDMT intensity in heart failure.
• To compare the KCMO score with existing metrics like the HF collaboratory and modified HF Collaboratory scores in terms of their ability to reflect GDMT intensity variation.

Main Methods:

• The Kansas City Medical Optimization (KCMO) score was developed, averaging daily to target dose percentages for eligible GDMT.
• KCMO, HF collaboratory (0-7), and modified HF Collaboratory (0-100) scores were calculated at baseline and for 1-year changes in established GDMT.
• The coefficient of variation was used to compare score distributions and assess variability.

Main Results:

• At baseline (n=4532), mean scores were KCMO 38.8, HF collaboratory 3.4, and modified HF Collaboratory 42.2.
• Over 1 year (n=4061), mean changes were KCMO -1.94, HF collaboratory -0.11, and modified HF Collaboratory -1.35.
• KCMO demonstrated the highest coefficient of variation (0.66), indicating superior resolution of GDMT intensity variability among patients.

Conclusions:

• The KCMO score effectively measures GDMT intensity by considering both dosing and treatment eligibility.
• This score offers enhanced granularity and interpretability (as a percentage of ideal GDMT) compared to existing measures.
• Further research is warranted to explore the KCMO score's association with patient outcomes and its utility in quality assessment and improvement initiatives for HF care.