Suadicani 2012

Methods	Cohort Study Country: Denmark
Participants	Participants: 3,333 males, male participants were derived from 14 workplaces in Copenhagen: the air force, army, navy, emergency management agency, postal service, customs service, a railroad company, national bank, a telephone company, three municipal service centres (for electricity and engineering and a fire brigade), a pharmaceutical company, and a building contractor company. Name of parent cohort: Copenhagen male study Recruitment: from 1970‐1971/1985‐1986 Outcome assessment: 1985‐1986/2001 Number of cases: deaths for lung cancer: 167 Case definition: death for lung cancer Years of follow‐up: 16 years Type of selenium marker: serum selenium concentration
Interventions	d.n.a.
Outcomes	Statistical methods: Cox logistic regression Variables controlled in analysis: age, pack‐years of smoking, spirits intake and dietary markers
Risk estimates [95% CI]	Reference category: lowest exposure category: 0.4‐1.0 µmol.L^‐1 Results: Deaths for lung cancer highest exposure category: HR 1.43 (95% CI 0.96 to 2.14)
Selenium levels in exposure categories	lowest category: 0.4‐1.0 µmol.L^‐1 highest category: 1.3‐3.0 µmol.L^‐1
Notes