Prevalence of Parkinson's disease in Hokkaido, the northernmost island of Japan.
The prevalence of Parkinson's disease (PD) was investigated in Hokkaido, the northernmost island of Japan. A pilot case-finding study was carried out to estimate the prevalence in the entire island of Hokkaido (population = 5,643,647) initially, then we surveyed the prevalence at one of the smaller cities, Iwamizawa City (population = 80,417). We ascertained 5,342 cases with PD in Hokkaido and 77 cases in Iwamizawa City, estimating the crude prevalence of 94.7/100,000 in Hokkaido (June 30, 1993) and 95.8/100,000 in Iwamizawa City (April 1, 1994), respectively. We calculated that the crude prevalence rate of PD in Japan in currently close to 100/100,000, but the age-adjusted prevalence is still low, compared with those in Europe and North America.
Moriwaka
F
F
Department of Neurology, Hokkaido University School of Medicine, Sapporo.
Tashiro
K
K
Itoh
K
K
Honma
S
S
Okumura
H
H
Kikuchi
S
S
Hamada
T
T
Kaneko
S
S
Kurokawa
Y
Y
D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D010300:Parkinson Disease / Q000453:epidemiology*; D012737:Sex Factors