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Scientific Concept of the National Cohort (status ... - Nationale Kohorte

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A.2 <strong>Scientific</strong> background and rationale for study elements<br />

population and represents an important confounder or effect modifier for o<strong>the</strong>r risk factors<br />

(genetic, environmental, etc.). Cumulative medical exposure to radiation will be estimated<br />

from individuals' health insurance data on <strong>the</strong> use <strong>of</strong> diagnostic and <strong>the</strong>rapeutic devices that<br />

employ ionizing radiation.<br />

The effective dose from external environmental radiation exposure is estimated to lie in <strong>the</strong><br />

range <strong>of</strong> 0.5 to 1.2 mSv per year in Germany (German Radiation Protection Commission<br />

2008). No data exist for individual external environmental radiation exposure; however, representative<br />

data on <strong>the</strong> individual distribution <strong>of</strong> radon concentrations in homes have been<br />

collected recently 423 .<br />

Assessment <strong>of</strong> exposure to ionizing radiation:<br />

Examinations and questionnaires (at baseline and during reassessment)<br />

Level 3: Questionnaire for medical exposure<br />

Bracelet dosimeter for assessing background exposure<br />

Secondary data: Health insurance data (estimation <strong>of</strong> medical exposure to<br />

ionizing radiation)<br />

Geocoding data on background radiation<br />

53<br />

A.2

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