This document prospectively records the procedures which will be used for handling losses to follow-up (LTF) in statistical analyses of WARSS data. They were developed by B Levin Ph.D. (WARSS senior statistical consultant) and JLP Thompson Ph.D. (WARSS statistician), and have been approved by the SOCC (Statistical Oversight and Coordinating Committee of the WARSS collaboration). They have been accepted by the WARSS Principal Investigator (JP Mohr M.D.), and also by the Principal Investigators of APASS, PICSS, HAS, and GENESIS for use in these collaborating studies.
Thompson, John L.P. and Levin, Bruce, "Losses To Follow-Up In WARSS Collaboration Datasets: A Detailed Statistical Presentation of the Imputation Procedures" (July 2000). Columbia University Biostatistics Technical Report Series. Working Paper 16.