Loss to Follow-up in Randomized Controlled Trials on Elbow Pathology: A Systematic Review and Meta-Analysis.
INTRODUCTION Loss to follow-up (LTFU) is a well-recognized source of bias in musculoskeletal research and may compromise the validity of randomized controlled trials (RCTs). Patients lost to follow-up may have different, often worse, outcomes, potentially leading to overestimation of treatment effects. Despite improved...