Amyotrophic lateral sclerosis. No increase among US construction workers in Guam.

The rate of amyotrophic lateral sclerosis (ALS) among stateside construction workers on Guam was similar to that of US resident white men. Of 12,601 men who worked on Guam for one year or more from 1945 to 1954, we were able to follow up 10,049 until 1970 through the Social Security Administration. Of these workers, 1,958 had died, and the cause of death was recorded for all but 335. There were three deaths from ALS. Residence on Guam as an adult did not predispose to a high rate of ALS.