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Anne Hammarström, Urban Janlert, Cohort Profile: The Northern Swedish Cohort, International Journal of Epidemiology, Volume 41, Issue 6, December 2012, Pages 1545–1552, https://doi.org/10.1093/ije/dyr118
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How did the study come about?
The Northern Swedish Cohort was started by Anne Hammarström [principal investigator (PI)] in collaboration with Urban Janlert and other researchers within the field of social medicine (Ragnar Berfenstam, Finn Diderichsen, Töres Theorell, Lars H Gustafsson, Claes Sundelin, Gustav Jonsson). At that time, the PI was a newly qualified registered medical doctor and was searching for a PhD project. An older colleague advised us to start a longitudinal study, which could be the database for our future research.
The background to the study was the relatively high unemployment rate among young people in Sweden at the beginning of the 1980s. Whereas some studies were available about the health consequences of unemployment in the adult population,1–3 there was a lack of research about possible health consequences of youth unemployment. Thus, we decided to perform a longitudinal study of a cohort of school-leavers. The chosen setting was Northern Sweden, as the highest levels of both youth and adult unemployment were found in that part of Sweden. In fact, unemployment had been endemic in this part of Sweden for a long time. The county capital of Norrbotten, Luleå, was chosen as this is a typical middle-sized, industrial town, which is comparable to Sweden as a whole with regard to important socio-demographic background data such as labour market structure, percentage of foreign born, housing, divorce rate and socio-economic status.4
