Table 1. Proportions of participants and age- and area-adjusted odds ratios for participation in the basic health examination according to sociodemographic factors, personal medical history, and lifestyle-related factors in 1990: JPHC Cohort I.

a) The Japanese standard occupational classification was used to categorize occupation: professional and technical workers (Profession), managers and officials (Manager), clerical and related workers (Clerk), sales workers (Sales work), service workers (Service work), protective service workers (Protective service), agricultural, forestry, and fisheries workers (Agriculture, forestry, and fishery), workers in transport and communications occupations (Transport and communications), craftsmen, mining, production process and construction workers and laborers (Labor).

b) DM, diabetes mellitus; CVD, cerebrovascular disease; HT, hypertension; IHD, ischemic heart disease.

c) Adjusted for age in 1990 (40-44, 45-49, 50-54, 55-59) and area (city, town and village).

d) 95% CI: 95% confidence interval