title: Epidemiological studies related to enhanced natural radiation: possibilities and problems.
abstract: Ultimately epidemiological studies alone provide the means to determine whether or not persons exposed to specified levels of enhanced natural radiation are at increased risk of developing cancers or other diseases. Various types of epidemiological study can be used to examine this issue, but each type has problems and limitations. In order to be viable any study must satisfy certain basic criteria concerning sample size, timespan, data quality, and allowance for confounding factors.
mesh_terms: D004739:England; D006798:Housing; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000453:epidemiology; D009688:Nuclear Reactors; D011830:Radiation Effects; D011832:Radiation Injuries / Q000453:epidemiology / Q000209:etiology*; D012044:Regression Analysis