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December 1, 2025Open Access

Quantifying Structural Selection Bias in Observational Cohort Data: A Ponderation Analysis of Age- Specific Incidence Rates to Inform Vaccine Safety Verification

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Analysis quantifies risk and incidence in observational cohort data, indicating severe methodological flaws affecting validity.

The corrected hazard ratio revealed a significant reduction of nearly 70% in observed risk following methodological adjustments.
Incidence rates highlight discrepancies in cohorts, raising concerns about vaccine safety and true incidence of Vitiligo.
Stratified ponderation analysis assessed structural selection bias using established age-specific incidence data.
Findings emphasize the importance of correcting design flaws to improve the validity of safety evaluations in vaccine research.

Roccetti, Marco (2025) studied this question.

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