Comstock 1997
Methods | Matched, nested case‐control study Country: US |
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Participants |
Participants: number of participants n.r.; both genders Inclusion criteria: residents of Washington County Name of parent cohort: CLUE I and II Cohort Recruitment: 1974/75 or 1989 Outcome assessment: n.r. Number of cases: Lung cancer: 258 (male/female: 157/101) Case definition: incidence Years of follow‐up: n.r. Type of selenium marker: serum/plasma |
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Interventions | d.n.a. | |
Outcomes | Statistical methods: conditional logistic regression Variables controlled by matching: age, gender, race/ethnicity, year and month of sample collection, participant of Clue I or Clue II cohort | |
Risk estimates [95% CI] |
Reference category: lowest quintile Results: Lung cancer both genders: highest quintile: OR 0.65 (CI not reported) |
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Selenium levels in exposure categories | n.r. | |
Notes |