Definition and Measurement of Exposure in Cohort Study Applying in Clinical Effect Evaluation of TCM by Cohort Study

Exposure is a term used in epidemiology, and is often used in cohort study. The definition and measurement of exposure would influence the application of cohort study and judgement of outcome. This article introduced the definition and measurement of exposure in epidemiology, and combining the characters of TCM, the author tried to discuss the method of definition and measurement of exposure when applied in TCM research.