Prevalence-incidence bias, also called Neyman bias, is most relevant in which setting?

• A. Case-control studies or cross-sectional snapshots that include prevalent cases, where rapidly fatal cases may be underrepresented.
• B. Randomized trials with long follow-up.
• C. Cohort studies with complete follow-up.
• D. Ecological studies with aggregated data.

Answer: (B)