In a recent Lundby paper, based on the original 1947 Lundby cohort [Hagnell et al., 1983], we reported a diminishing trend in the incidence of both senile and multi-infarct dementia from the first period of study 1947-1957 to the second, 1957-1972. In the present study we use the total Lundby population, including those who entered the Lundby project in 1957, as a basis for our calculations. The findings indicate no statistically significant changes in the prevalence and incidence of senile and multi-infarct dementia during the observation period 1947-1972.