Methodological variations and their effects on reported medication administration error rates.

Area of Science:

• Healthcare research methodology
• Patient safety science
• Clinical pharmacy

Background:

• Medication administration errors (MAEs) are a significant patient safety concern.
• Methodological inconsistencies across studies hinder a clear understanding of MAE rates and contributing factors.
• This study focuses on the UK as a case study to analyze variations in MAE research.

Purpose of the Study:

• To systematically summarize methodological variations in medication administration error (MAE) studies conducted in UK hospitals.
• To assess the impact of these methodological variations on reported MAE rates.
• To provide recommendations for future MAE research to enhance consistency and reliability.

Main Methods:

• Systematic review of quantitative observational MAE studies from nine healthcare databases.
• Analysis of methodological variations including MAE definitions, subcategories, and denominators.
• Meta-analysis of MAE rates and calculation of odds ratios (OR) for intravenous (IV) vs. non-IV and pediatric vs. adult doses.

Main Results:

• 16 studies were identified, reporting diverse MAE definitions, subcategories, and denominators.
• Overall adult MAE rates were 5.6% for non-IV and 35% for IV doses.
• MAEs were significantly more likely in IV than non-IV doses (OR 5.1).
• Inclusion of timing errors or dose omissions substantially altered reported MAE rates.

Conclusions:

• Significant methodological variations exist in MAE studies, even within a single country.
• These variations demonstrably affect reported MAE rates, complicating comparisons and safety assessments.
• Standardized methodologies are recommended for future MAE research to improve data comparability and inform safety interventions.