The tape contains eight files (listed below) of data collected for an EPA-sponsored case-control study of nasal and pharyngeal cancer and formaldehyde associations. The study was conducted by the Fred Hutchinson Cancer Research Center between December, 1982 and February, 1986 through a subcontract from Science Applications International Corporation. The study attempted to include all incident cases of cancer of the nasal cavity and sinus occurring between 1/1/79 - 12/31/83, and cancer of the pharynx occurring between 1/1/80 - 12/31/83. The study population included residents of 13 counties in western Washington who were between the ages of 20-74 at the time of diagnosis. The study data were collected through interviews, and include information on the demographic, chemical exposure, smoking, alcohol, and medical histories of the persons interviewed. Data Files: NASDB1 General interview data, including medical history, tobacco use, occupation, alcohol history, and background information. NASDBC Chemical exposure data. NASDBF Diet data. NASDBO Occupation data. NASDBR Residence data. NASCSS Cancer registry data. IDNUM List of numbers identifying the cases and controls analyzed for the study. FORMOCC Formaldehyde exposure - job linkage system data.