1 citations · 1 across the 5 of their papers we have counts for
Showing stat.APShow all
3 papers · 1 filter
stat.AP2025
Performance of prior event rate ratio method in the presence of differential mortality or dropout
Yin Bun Cheung, Xiangmei Ma
Purpose: Prior event rate ratio (PERR) method was proposed to control for measured or unmeasured confounders in real-world evaluation of effectiveness and safety of medical treatme…
stat.AP2024
Strategy to control biases in prior event rate ratio method, with application to palliative care in patients with advanced cancer
Xiangmei Ma, Grace Meijuan Yang, Qingyuan Zhuang +1
Objectives: Prior event rate ratio (PERR) is a method shown to perform well in mitigating confounding in real-world evidence research but it depends on several model assumptions. W…
stat.AP2024★ 1 cited
Robust evaluation of vaccine effects based on estimation of vaccine efficacy curve
Ziwei Zhao, Xiangmei Ma, Paul Milligan +1
Background: The Cox model and its extensions assuming proportional hazards is widely used to estimate vaccine efficacy (VE). In the typical situation that VE wanes over time, the V…