Table 3. Parkinson disease incidence by district in Wakayama 1997.

Items	Kihoku	Kichu	Kinan
Location	North	Central	South
Incidence [95%CIs] (per 105)	15.9 [12.9-18.9]	18.1 [12.0-24.2]	19.3 [13.4-25.2]
Age-adjusted rate [95% CIs] *	10.8 [ 9.1-12.7]	10.4 [ 8.6-12.2]	9.9 [ 6.9-12.9]
Background features
municipalities	17	17	16
population in 1995(per 105)	68.5	18.3	21.3
parcentage of 65 years and over	16.3	20.7	21.7

*: Age was adjusted using the model population based on the census 1985.