Background: We evaluated whether a catheter-to-vein ratio (CVR) of >45% increases the risk of venous thromboembolism [VTE] and catheter occlusion associated with peripherally inserted central catheters (PICCs). Methods: From August 2020 to April 2022, trained abstractors collected demographic and clinical data on patients receiving PICCs while admitted at 52 hospitals participating in the Michigan Hospital [...]