in observational studies, whether there is exposure is determined by the subject himself/herself or naturally. Note: The difference between a trial and a study is quite fuzzy, but they can be distinguished as follows: a trial bears on an intervention that will change the course of things and that applies to humans, while a study examines the outcomes of an intervention or of exposure to a given factor, or may have other aims, such as observing the course of a disease. A trial may be part of a study, but the reverse is not true.»

клиническое испытание

clinical trial

Syn.: clinical practice guideline A guideline developed using a systematic method to help practitioners and patients make decisions about appropriate health care.Note: The development of clinical guidelines may use technology assessment methods or be based on technology assessment reports.