Reassessing Instrument Strength in Two-Sample Mendelian Randomization Analysis
Xiaonan Liu, Yu‐Jyun Huang, Yogesh Purushotham, Tamar Sofer
This study evaluates the impact of weak instrumental variables in two-sample Mendelian randomization, showing they can weaken effect estimates in small samples but are less harmful in large ones.
medRxiv · Jun 19, 2026 · PreprintGenetic & Genomic Medicine