Since the appearance of clinical studies, the ability to decide whether a treatment is really efficacious, or the patient recovered due to the impact of a particular medication has played an important role. In fact, biostatistics has gained a significant role in clinical medication tests.

The other important area of medical research is to examine factors that trigger a certain diseases, that is, the risk factors. The treasury of statistical methods includes several methods with the help of which we can identify risk factors causing a particular disease.

In the last decade of medical science, genetic research has gained a significant role. Genetic knowledge allows the researchers to obtain a great number of information that are especially important in the exploration of risk factors, the classification of existing diseases, and in choosing the most efficacious therapy and describing pathologic processes.

Upon starting a clinical study, after establishing clinical settings, plans and protocols, the statistical methods and procedures to be used have to be determined in advance. The sample sizes of the various groups have to be determined in accordance with the established clinical settings. After the study, the pre-specified analytical methods are used, that is, data evaluation. The summary report will include the results and conclusions.

In a particular circle of indication, the typical patient paths through which patients reach therapy can be explored. Another subject of research may be to explore what type of specialist continue the formerly ordered therapy and how long.

Evidence research is related to a particular indication, and it means the exploration of therapeutic protocols used in practice in the circle of doctor group or groups – primarily with the help of face-to-face questionnaire interviews.

In practice, it means the comparison of therapies from health-economical aspects. Thus, we can determine which therapy is more economical in a particular indication taking into account only expenses. Linking analysis with evidence research allows us to obtain an even more accurate picture about the cost-efficiency of various therapies.