Berkson's bias is characteristically associated with which study design?
- A Community-based cohort study
- B Randomized controlled trial
- C Hospital-based case-control study ✓
- D Ecological study
Correct answer: C. Hospital-based case-control study
Explanation
Berkson's bias (hospital admission bias) occurs when hospital-based case-control studies select cases and controls from admitted patients. Hospitalized individuals differ from the general population, and patients with combinations of diseases are over-represented, creating spurious associations. This is a form of selection bias.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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