The lung cancer mortality of welders was investigated using a cohort of 3,247 males from the International Brotherhood of Boilermakers, Iron Ship Builders, Blacksmiths, Forgers and Helpers in Seattle, Washington. The subjects had been union members for at least 3 years. The vital status of the men was determined as of January 1, 1977, and lung cancer deaths were coded according the Codes 162 and 163 of the Sixth, Seventh, and Eighth revisions of the International Classification of Diseases. A modified life table computer model was used to determine the standardized mortality ratios. The ratios were compared to the United States death rates for white males specific for age and calendar time and also to death rates among 5,432 nonwelders from the same union. A total of 16 percent of the cohort was deceased at the time of the study cutoff date. Fifty of these deaths were due to lung cancer as compared to an expected 37.95 deaths due to lung cancer in the general white, male population. Age of first employment and calendar time of employment were both positively correlated with cancer mortality. The welders showed a significantly greater incidence of lung cancer relative to nonwelders in the same union but only after 20 years from first exposure. The overall increase in risk for mortality attributable to lung cancer among welders relative to the general population was 32 percent, but this increased to 74 percent at 20 or more person years from first employment. The authors conclude that it appears that welders are exposed to carcinogenic fumes from their work, but this requires further study for possible confounding factors.
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.