In conclusion, our study suggests only a slight increased
risk of lung cancer for subjects who ever held an occupation
in the construction industry. In the analyses of
agents within the construction industry, there were suggestions
of increased risks among workers exposed to
soil dust, asbestos, crystalline silica, Portland cement,
calcium oxide, and calcium sulfate. For asbestos and silica
exposure in the construction industry, this provides
stronger evidence than previous studies which included
many industries; for the other agents, it signals the need
for corroborative evidence.