九乡新闻网酷派大神f2全网通双卡:What Is an Open-Label Trial?
来源：百度文库 编辑：九乡新闻网 时间：2024/07/14 02:34:29
An open-label trial is a clinical trial conducted in a way that allows subjects and researchers to know which treatments are being used. Sometimes the circumstances of a trial make it impossible to conceal the identity of the treatment patients are receiving, and in other cases researchers may have a specific reason for wanting to use the open-label trial format. There are a number of ways to set up open-label trials; they can be controlled and randomized just like other types of experiments, for example.
Many people are familiar with the concept of blind and double blind studies. In a blind study, people participating in the study do not know which treatment they are receiving, although researchers do. The participants may receive a pharmaceutical or a placebo, and if they are receiving the actual drug being tested, it could be offered in different dosages. Double blind studies also conceal the identity of the treatments from the researchers. These study methods are often preferred because they are believed to deliver more valid and useful results, since participants and researchers cannot be influenced by their knowledge.