Nested Case-Control Study of Leukemia and Ionizing Radiation at the Portsmouth Naval Shipyard A Nested Case-Control Study of Leukemia and Ionizing Radiation at the Portsmouth Naval Shipyard DEPARTMENT OF HEALTH AND HUMAN SERVICES Centers for Disease Control and Prevention National Institute for Occupational Safety and Health i Nested Case-Control Study of Leukemia and Ionizing Radiation at the Portsmouth Naval Shipyard A Nested Case-Control Study of Leukemia and Ionizing Radiation at the Portsmouth Naval Shipyard October 2004 i Nested Case-Control Study of Leukemia and Ionizing Radiation at the Portsmouth Naval Shipyard Disclaimer Mention of any company or product does not constitute endorsement by the National Institute for Occupational Safety and Health (NIOSH). In addition, citations to Web sites do not constitute NIOSH endorsement of the sponsoring organizations or their programs or products. Furthermore, NIOSH is not responsible for the content of these Web sites. Ordering Information To receive documents or other information about occupational safety and health topics, contact NIOSH at NIOSH—Publications Dissemination 4676 Columbia Parkway Cincinnati, Ohio 45226–1998 Telephone: 1–800–35–NIOSH (1–800–356–4675) Fax: 513–533–8573 E-mail:
[email protected] or visit the NIOSH Web site at www.cdc.gov/niosh HHS (NIOSH) Publication No. 2005-104 ii Nested Case-Control Study of Leukemia and Ionizing Radiation at the Portsmouth Naval Shipyard Preface Ionizing radiation and its sources are used every day in medical, industrial and governmental facilities around the world. Although some health risks from ionizing radiation exposures are widely recognized, the association of these exposures to specific diseases, especially various types of cancer, remains uncertain.