To highlight large-scale lawyer-driven reporting distortions and their potential effects on disproportionality assessments.
Approach:
Analysis of Reporting Bias: The article examines the impact of lawyer reporting bias (LRB) on disproportionality analysis (DPA) in spontaneous reporting systems (SRS), focusing on both upward and downward biases.
Data Examination: Utilizes data from the World Health Organization Uppsala Monitoring Center Vigibase to illustrate the proportion of lawyer reports and their impact on adverse event reporting.
Key Findings:
Lawyer-driven reporting can distort SRS data, leading to biased statistical measures.
DPA outputs are uninterpretable when independence and spontaneity assumptions are violated, resulting in false-positive and false-negative signals.
Masking can occur when litigation-driven reports inflate background counts, potentially leading to missed causal associations.
Surges in lawyer reports can exacerbate LRB, especially with common medications and serious adverse events.
Interpretation:
The findings illustrate the complexities introduced by lawyer reporting in pharmacovigilance.
Limitations:
Research on lawyer report-induced masking is limited and requires further study.
The analysis may overlook important findings about specific drug-event pairs by averaging impacts.
Conclusion:
The article calls for further investigation into the effects of lawyer reporting on drug safety assessments.
