Additional file 3: Table S3. of An updated re-analysis of the mortality risk from nasopharyngeal cancer in the National Cancer Institute formaldehyde worker cohort study

a Observed deaths and interval rate-based RRs or β coefficients by highest peak FA exposure. b Observed deaths and interval rate-based RRs or β coefficients by average intensity of FA exposure (ppm). c Observed deaths and interval rate-based RRs or β coefficients by cumulative FA exposure (ppm-years). d Observed deaths and interval rate-based RRs or β coefficients by duration of FA exposure (years). (DOCX 77 kb