Individual Study / H2000/11

6 986 persons of the sample (87%) were interviewed in their home or in an institution. The number participating in the health examination proper was 6 354, while 416 took part in the health examination at home or in an institution. Overall then, 79% of the whole sample participated in the health examination proper, 84% participated either in the health examination proper or in the examination at home.

It was included a new sample of young adults (aged 18–28 years) from the sample in the baseline. Due to the fact that there were changes in the health centre districts from year 2000 to 2011, a modification for the original PPS based sampling design was required. In three cases where old health centre districts were split and some of the municipalities were amalgamated to another municipality (Piikkiö to Kaarina) or to a larger town (Korpilahti to Jyväskylä, and Savonranta to Savonlinna), a large sample was sampled from the new town and the GIS coordinates were utilized to select an appropriate number of individual sampling units from the amalgamated municipalities. Two health centre districts were amalgamated to other health centre districts (Pyhäselkä to Joensuu, and Perniö to Salo).