FrontMatter -- Acknowledgments -- Contents -- Glossary -- Summary -- 1 Introduction and Background -- 2 Trial Designs to Reduce the Frequency of Missing Data -- 3 Trial Strategies to Reduce the Frequency of Missing Data -- 4 Drawing Inferences from Incomplete Data -- 5 Principles and Methods of Sensitivity Analyses -- 6 Conclusions and Recommendations -- References -- Appendix A: Clinical Trials: Overview and Terminology -- Appendix B: Biographical Sketches of Panel Members and Staff -- Committee on National Statistics.