Human Research Protection Program

An In-depth Look at Informed Consent

The primary purpose of informed consent is to protect the prospective human subject.

Informed consent provides the individual with the pertinent information regarding the research in which s/he is being asked to participate, and the opportunity to make an informed decision regarding whether or not to participate in the research. The procurement of informed consent signifies that the subject has made an informed decision and agrees to participate without coercion, force or fraud.

Consent must also be freely given — it must be made clear to the subject that s/he is not required to participate and that s/he can withdraw at any time without fear of penalty or loss of benefits of any kind.

In 1974, as a result of the publicization of the Tuskegee Syphilis Study,* the National Research Act was passed, leading to the publication of the Belmont Report in 1978. This report was then incorporated into the Code of Federal Regulations for the protection of human subjects in biomedical and behavioral research (45 CFR part 46).

The Belmont Report outlined the three fundamental ethical principles by which human subjects research has since been guided:

  1. Respect for persons, or treating individuals as autonomous agents ("capable of deliberation about personal goals and of acting under the direction of such deliberation") and protecting persons with diminished autonomy.

  2. Beneficence, or protecting individuals from harm by maximizing potential benefits and minimizing potential for harm (risk).

  3. Justice, or distributing the risks and potential benefits of research equally among those who may benefit from the research.

The regulations codified all three of these principles in 45 CFR 46.111 (Criteria for IRB approval of research); however, respect for persons, and more specifically informed consent, receives extensive attention and is discussed in detail in sections 116 (General Requirements for Informed Consent) and 117 (Documentation of Informed Consent).

For more examples of research, as well as a more in-depth discussion of the Belmont Report and regulations, see "An In-depth Discussion of the Institutional Review Board."

Obtaining informed consent, then, is one of the cornerstones of conducting ethical human subjects research.

* From 1932-1972, the U.S. Public Health Service enrolled 400 low-income African-American males with syphilis in a research project dubbed the Tuskegee Study, which studied the effects of untreated syphilis. While the men were told they were being treated for "bad blood" (the term used at that time to describe a number of ailments including anemia and fatigue as well as syphilis), in fact, they were not; treatment was withheld throughout the study, despite the advent of penicillin and "rapid treatment centers" to treat syphilis in the 1940s. In 1968, concerns were raised about the ethics of the study. However, the Centers for Disease Control and Prevention, the American Medical Association and the National Medical Association continued to support the study. In 1972, the Associated Press ran a story about the Tuskegee Study, and the study was ended as a result of the publicity.