Formation of potential risk groups among Chernobyl emergency workers

The paper describes a methodology for forming potential risk groups among Chernobyl emergency workers. Based on the actual data of the National Radiation and Epidemiological Registry (NRER) the conclusion is made that a statistically significant excess of cancer incidence rate occurs among emergency workers with the attributive risk value higher than 15 %. A potential risk group has been formed to secure meaningful targeted assistance from health authorities.