Medical knowledge decline: the role of active usage.

Area of Science:

• Medical Education
• Continuing Professional Development
• Health Professions

Background:

• Physician assistants/associates (PAs) experience a decline in medical knowledge after initial certification.
• This decline may be linked to the frequency of knowledge application in daily clinical practice.
• Understanding knowledge retention patterns is crucial for effective continuing medical education and recertification.

Purpose of the Study:

• To investigate the reasons behind the decline in PA medical knowledge post-certification.
• To determine if the frequency of knowledge use in practice influences knowledge retention.
• To inform improvements in competency assessment and recertification strategies for PAs.

Main Methods:

• Analysis of data from Physician Assistant National Certifying Exam (PANCE) and Physician Assistant National Recertifying Exam – Longitudinal Assessment (PANRE-LA).
• Classification of medical knowledge subdomains into 'dominant', 'relevant', and 'distant' based on frequency of use, verified by expert PAs.
• Latent Transition Analysis (LTA) to model knowledge decay probabilities in relation to usage frequency.

Main Results:

• Knowledge decline is significantly influenced by practice profile and frequency of use.
• Less frequently used knowledge ('relevant' and 'distant') showed a higher likelihood of decline compared to 'dominant' knowledge (OR=2.31 and OR=2.26, respectively).
• Dominant knowledge demonstrated a greater probability of improvement over time compared to relevant and distant knowledge.

Conclusions:

• Medical knowledge decay is not uniform; it varies based on the specific knowledge domain and its clinical relevance.
• Recertification assessments should consider the differential decay rates of medical knowledge based on usage frequency.
• Tailoring continuing education and assessment strategies to address specific knowledge gaps can enhance PA competency maintenance.