Long‐COVID Causal Impacts on Cognitive Ability of Mild‐cognitive Impaired Population from Large‐scale Electronic Health Record Using Heterogeneous Causal Effect Model

Identification of long‐COVID impacts on human cognitive ability is important but Randomized Controlled Trial (RCT) is not possible. Virtual RCT (VRCT) can be done from electronic health record (EHR) which requires to address heterogeneity appropriately.