Characterization of Medication-Related Errors and Prioritization of Patient-Safety Interventions in Hospital Care: A Retrospective Observational Study

A. Rationale: Medication-related incidents are an important patient-safety concern, particularly in critical-care and inpatient settings where polypharmacy, clinical complexity, frequent therapeutic modifications, and transitions of care increase the risk of medication errors. Systematic analysis of reported incidents can help identify predominant error patterns, potential contributing factors, and priority areas for quality improvement. The present study was undertaken to characterize medication-related incidents and identify areas requiring targeted patient-safety interventions. B. Research Question What are the predominant patterns and distribution of medication-related incidents across critical-care and inpatient units, what patient-care, process, communication, documentation, and system-level factors potentially contribute to their occurrence, and how can these findings be systematically translated into prioritized, evidence-based quality-improvement interventions to strengthen medication safety and reduce preventable medication-related harm? C. Study Design and Methods A retrospective descriptive observational study was conducted to assess the pattern of medication-related errors identified through medication audits conducted in inpatient and critical-care settings. A total of 74 medication audit records were retrospectively reviewed. Each record was evaluated for the presence and type of medication-related error, including transcription, administration, documentation, and dispensing errors. The identified medication errors were categorized based on the nature of the error documented in the audit records. As individual records could contain more than one type of medication-related error, the error categories were considered non-mutually exclusive. Consequently, the total number of error occurrences could exceed the number of records reviewed. Descriptive statistical analysis was performed using frequency distributions and percentages to determine the relative occurrence of each medication-error category. Pareto analysis was subsequently performed to identify the predominant error categories and establish priorities for quality-improvement interventions. The Pareto analysis demonstrated that transcription and administration errors constituted the major contributors to the observed medication-related errors. The identified error patterns were further evaluated using a process-based patient-safety approach to determine potential failure points within the medication-use process. Poka-Yoke (error-proofing) principles were applied to identify opportunities for preventing or detecting errors at the point of occurrence. Based on the findings, potential interventions included standardization of medication-ordering and transcription processes, mandatory verification of medication details, strengthening of independent verification for high-alert medications, and incorporation of technology-enabled safeguards such as electronic medication administration records and barcode-based medication administration. The findings were used to identify priority areas for targeted quality-improvement interventions aimed at reducing medication-related errors and strengthening the safety and reliability of the medication-use process. D. Results: A total of 91 medication-related error occurrences were identified across the 74 audit records reviewed. Transcription errors constituted the predominant error category (46; 50.5%), followed by administration-related errors (41; 45.1%). Documentation-related and dispensing-related errors accounted for 3 (3.3%) and 1 (1.1%) occurrences, respectively. Pareto analysis demonstrated that transcription and administration-related errors collectively accounted for 87 of the 91 identified occurrences (95.6%), indicating a substantial concentration of medication-related errors within these two categories. The cumulative frequency increased from 50.5% for transcription errors to 95.6% following inclusion of administration-related errors, while the remaining categories contributed only 4.4% of the total error occurrences. Accordingly, transcription and administration-related errors were identified as the principal priority areas for subsequent root cause analysis and quality-improvement interventions. Interpretation: The findings demonstrate that transcription errors (50.5%) and administration-related errors (45.1%) were the predominant medication-related errors, collectively accounting for 87 of the 91 identified error occurrences (95.6%). Documentation-related errors constituted 3.3%, while dispensing-related errors accounted for 1.1% of the observed occurrences. Pareto analysis revealed a marked concentration of medication-related errors within the transcription and administration domains, indicating that these two categories represented the principal areas requiring focused quality-improvement interventions. Subsequent Root Cause Analysis (RCA) and Poka-Yoke-based error-proofing approaches were therefore directed toward identifying and mitigating process vulnerabilities within these high-frequency error domains. Keywords: Medication-related incidents, Medication errors, Patient safety, Critical care, Inpatient care, Medication transcription errors, Medication omission, Medication administration, Root Cause Analysis, Pareto analysis, Poka-Yoke, Error-proofing, Quality improvement, Medication safety, PDSA.