Newly Diagnosed Primary Lung in Patient Safety, Preventive & Ethics — Case | Epidemiology & Biostatistics | SMLE Q#12057
SMLE Question #12057
Patient Safety, Preventive & Ethics
Epidemiology & Biostatistics
Objective: OBJ-367
Last updated: February 2026
Researchers conduct a case-control study on cigarette smoking and lung cancer. They enroll 200 adults with newly diagnosed primary lung cancer (cases) and 200 age- and sex-matched adults without lung cancer (controls) from the same hospital. Smoking status is classified as ever-smoker or never-smoker. Among cases, 150 are ever-smokers and 50 are never-smokers. Among controls, 50 are ever-smokers and 150 are never-smokers. What is the odds ratio for the association between smoking and lung cancer?
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