Epidemiological surveys are used to study population diseases. Manual or electronic questionnaries are built, the target population questionned and the results are obtained with statistical tools. Every new study supposes to create again new questionnaries and start again the statistical process. Today, medical records, wich contain the medical data and epidemiological studies wich need medical data are not linked. We propose in this article a new tool based on Topic Maps representation and description logic used to create both a own medical record and data classification. The data classifications represent a first step for epidemiological study. We complete this step with a document generation tool for epidemiological studies.