Since 1974, the Preventive Medicine Section of the Department of Medicine at Malmö General Hospital, has run a continuous health screening and intervention program for the consecutive investigation by birth-year cohorts of the city. During a 5-year period, all 47-49-year-old Malmö males, born 1926-1931, were invited to participate, 77% of whom accepted.
In a 5-year health screening survey of 6,956, 47-49-year-old Malmö males was included. After 6.2+ 0.9 years (54.3 + 1.4 years), a second 3-year screening survey was performed on 5,149 of the participants in the first screening.
A subset of the study was selected (203 patients) for analysis.