Informed Consent in Clinical Research

Definition & ethical basis

• Definition — Informed consent is the process by which a competent individual, after being given and having understood all relevant information about a study, voluntarily confirms her/his willingness to participate. It is the operative participant-protection mechanism the Declaration of Helsinki mandates and the Ethics Committee (EC)/IRB reviews.
• A process, not a signature — ICMR frames consent as a continuous process, not a one-time signature event, with three components: (i) providing relevant information, (ii) ensuring competence and easy comprehension, and (iii) assuring voluntariness.
• Why consent is required — Research — unlike routine care — primarily intends to advance generalizable knowledge so patients in general may benefit; the participant may or may not benefit directly. This distinguishes research from innovative practice (sole intent = benefit the individual) and from audit.
• Ethical & legal anchor — Foundation = respect for individual autonomy — the right of a competent person to decide freely whether to participate or to withdraw at any time. Legal anchor: UN ICCPR (1966) Art.7 — "no one shall be subjected without his free consent to medical or scientific experimentation."
• Historical driver — US federal regulations requiring informed consent + IRB review (1974) were a direct response to the Tuskegee syphilis study (1932–72), which withheld penicillin and deceived participants — violating respect for persons, beneficence, justice and truth-telling simultaneously.