Front Matter -- Committee on the Longitudinal Study of Astronaut Health -- Independent Report Reviewers -- Preface -- Contents -- List of Tables -- Executive Summary -- 1 Introduction -- 2 Findings to Date -- 3 Issues with Design and Implementation of the Current Longitudinal Study -- 4 Recommendations for Changes in Study Design and Execution -- 5 Recommendations for Changes in Health Care Policy -- References -- Appendix A: Biographical Sketches of Committee and Staff -- Appendix B: Variables in the LSAH Database -- Appendix C: Health Lifestyle Questionnaire.