Proficiency test performance and experience with College of American Pathologists' programs

Area of Science:

• Clinical Laboratory Science
• Medical Diagnostics
• Quality Assurance in Healthcare

Background:

• Interlaboratory comparison programs are crucial for assessing laboratory performance.
• Proficiency testing (PT) helps identify areas for improvement in clinical laboratories.
• Small hospitals, clinics, and physician offices rely on PT for quality control.

Purpose of the Study:

• To evaluate if laboratory experience in proficiency testing reduces unacceptable results.
• To determine the impact of consistent participation on laboratory performance.
• To analyze trends in unacceptable result rates over time.

Main Methods:

• Analysis of data from the College of American Pathologists' Excel Surveys (1987-1993).
• Examination of results across chemistry, hematology, immunology, and blood bank disciplines.
• Statistical assessment of performance improvement with increasing laboratory experience.

Main Results:

• Consistent participants showed statistically significant performance improvement in the first 3-4 years of PT.
• Laboratories with greater experience in PT demonstrated lower rates of unacceptable results.
• A trend of decreasing unacceptable results was observed with each year of experience.

Conclusions:

• Proficiency testing programs demonstrably improve laboratory performance.
• Increased experience in interlaboratory comparison programs correlates with enhanced accuracy.
• The findings support the established benefits of proficiency testing for clinical laboratory quality.