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Arab Board Community Medicine Final Written Practice Questions - Arab Board Of Health Specializations (ABHS) Community Medicine Final Written Examination Exam

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A hospital-based case-control study explores the association between chronic coffee consumption and peptic ulcer disease. Patients admitted for gastrointestinal bleeding are chosen as cases, while patients admitted for orthopedic trauma serve as controls. The observed odds ratio is distorted because coffee consumption and peptic ulcers both increase the probability of hospital admission. What specific epidemiological bias is demonstrated?
Correct Answer:
Berkson's bias (admission rate bias)

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