Confounding by Indication: Response

Abstract

We read with great interest the recently published paper ''The Prevalence of Symptomatic Deep Venous Thrombosis and Pulmonary Embolism After Anterior Cruciate Ligament Reconstruction,'' by Gaskill et al 2 in the November 2015 issue of The American Journal of Sports Medicine. The authors present the prevalence of venous thromboembolism (VTE) following anterior cruciate ligament (ACL) reconstruction. In addition, they report risk factors for VTE. Given the severity of the disease 3