I think what you are asking for is not open in many of the countries. DHS covers data from many of the low-middle income countries, however, the data is very limited when it comes to clinical matters. In most of the EU countries, first you have to have a ethical clearance and then apply to the relevant organization for the data you need for your project.
Behavioral Risk Factor Surveillance System (BRFSS). You may find data from CDC WONDER. National Center for Health Statistics (NCHS) and Web-based injury Statistics Query and Reporting System (WISQARS). These data bases may help and offer other data bases. The World Health Organization (WHO) may also be of assistance in data queries such as Global Health Observatory (GHO) data. Hope this help.