Introduction: Now there is a possibility of exchanging information concerning RCT (Randomized Controlled Trials) both the previous ones and present carring out. That can be done due to fruitful works of Cochrane Collaboration Center and its director Dr Iain Chalmers. it seems to be obvious that exchange of information about assumptions and results as well as persons interested in problems undertaken, can be adopted by other science fields quite easily. But there is a lot of work to do on the medical field.

The basic data describing health conditions of society are analysed practically in every country in the World-Rates like normortality, hospital morbidity,incidence (especially for some of infection diseases), or any other rates similar to them, can be use as a crude parameters or characteristic for selected diseases. The analysis of these parameters in connection with data concerning pollution of natural environment is one of the most important factor for proper financial funds allocation in medical service.

But possibility of preparing comparative analysis depends on accessibility to standards of creating appropriate databases for general medical data (epidemiological data),as well as for demographic,or environmental and socioeconomic data. Possibility of using these information could be helpful in verifying health services (protection) programmes carrinq out in many countries at presenter will contribute to optimalization these programmes and improve its results.

Discussion: The reports presents some solutions concerned:

* creating structures of databases;
* methodology of collecting data and building the databases;
* principles of access to both databases and information included in the proposals are based an laboured methods of creating medical information databases. Managing and controlling these databases are founded on still growing up possibilites, of telecommunication links like INTERNET.