WSPsignal - Weibull Shape Parameter Tests for Signal Detection
Implementation of Bayesian and frequentist Weibull Shape
Parameter (WSP) tests for signal detection in pharmacovigilance
based on right-censored time-to-event data to flag associations
between drugs and adverse events. The WSP test is based on the
assumption of constant hazard reflected by a Weibull type
distribution with shape parameters equal to one. Based on the
shape parameter estimates (posterior distribution or point
estimate), the WSP test method performs a hypothesis test on
each shape parameter and combines them to a decision on the
presence of a signal. Methods described in Sauzet and Cornelius
(2022) <doi:10.3389/fphar.2022.889088>, Sauzet et al. (2024)
<doi:10.1007/s40264-024-01460-2>, and Dyck and Sauzet (2025)
<doi:10.48550/arXiv.2412.05463>.