Table 1.

Characteristics of study participants.

		n
Total		110
Gender	Men	53
	Women	57
Age	50–59	45
	60–69	56
	70–79	9
Current job	Clerk	17
	Shopkeeper	44
	Housewife	20
	Agriculture	29
Area	Katsushika	20
	Miyako	38
	Saku	30
	Kashiwazaki	22

Data were obtained simultaneously with the survey of Japan Public Health Center-based Cohort Study in 2003–2004.