The term “predictor” (from the English predictor “predictor”) is used in various fields, including medicine, as an indicator and prognostic factor. We have tried to differentiate and systematize anxiety disorders, depending on the specifics of anxiety and the latest classification. Anxiety is an emotional state that arises in a person as a result of anticipating the danger of frustration of significant needs for him, especially social ones. The term “anxiety disorder” is generalized and corresponds to several diagnoses: “anxiety and phobic disorders”, “disorders associated with mental stress” and “obsessive-compulsive spectrum disorders”. Anxiety disorders are highly comorbid with other somatic diseases, but their description is not possible due to the limited scope of the article.