THE SECULAR TREND IN THE INCIDENCE OF SUBARACHNOID HEMORRHAGE IN MIYAGI, JAPAN - 1979-1990

Since 1978, a stroke registry has been carried out in Miyagi Prefectur e (2.2 million in population), Japan. Approximately 2,000 cases of str oke were annually registered through 16 hospitals which have cerebrova scular disease units. The incidence of subarachnoid hemorrhage was 17. 4 per 100,000 population in 1990. The incidence increased gradually du ring early 1980's and reached plateau during late 1980's. Furthere, th e trend in the incidence of subarachnoid hemorrhage is compared with t hose in other communities in other countries as well as Japan.