Which statement best reflects ethical considerations in cohort studies?

• A. Only consent is needed; no IRB.
• B. Informed consent, data privacy, protection of confidentiality, and minimizing harm; ensure IRB approval.
• C. Data privacy is unnecessary if data are de-identified.
• D. Ethical considerations apply only to interventional studies.

Answer: (B)

Ethical considerations in cohort studies center on protecting participants and ensuring responsible conduct of research. The best statement reflects obtaining informed consent, safeguarding data privacy and confidentiality, minimizing potential harm, and obtaining approval from an Institutional Review Board. Informed consent ensures participants understand what data will be collected, how it will be used, any risks, and their right to withdraw. Protecting privacy and confidentiality means secure data handling, restricted access, and de-identification where possible, while acknowledging that de-identified data can still carry re-identification risk. Minimizing harm involves designing the study to reduce physical or psychological risks. IRB approval provides independent review of the study’s risks and safeguards before it begins, which is a standard requirement for human subjects research, whether observational or interventional.

Consent alone isn’t enough without oversight and protections, de-identification does not completely eliminate privacy concerns, and ethics apply to all human subjects research, not only interventional studies.