Participation in Tromsø1, 1974;
A total of 8866 men were invited to participate in Tromsø1, and of these 6595 (74 percent) participated in the study.
If you do not take into account people who were temporarily away from Tromsø, the participation rate was an impressive 83 percent.
Examination methods and measurements
A brief questionnaire accompanied the invitation. The questionnaires included questions on diagnosed cardiovascular diseases or diabetes, symptoms of cardiovascular diseases, smoking habits and physical activity during work and leisure time. A brief interview was also conducted, and measurements of height, weight and blood pressure were taken. A blood sample was also taken to measure serum total cholesterol, triglycerides and haemoglobin.
What did we discover?
The best-known research result from Tromsø 1 is the demonstration of a relatively high level in the serum of HDL-cholesterol ("the good cholesterol") that helps to prevent myocardial infarction. In 1977, this was the Norway's most frequently referred to scientific work within medicine, and over the years this discovery has been referred to on more than 1100 occasions in specialist medical literature.