Table 1

 Case-control comparisons of basic characteristics at reference date

ControlCaseTotal
*Metropolitan area of Tokyo.
†Municipalities of Tokyo.
‡Up to 9 years.
§Up to 14 years.
¶16 years or more.
Age (years)
    30–3978 (23.64)22 (22.68)100 (23.42)
    40–4946 (13.94)14 (14.43)60 (14.05)
    50–59150 (45.45)46 (47.43)196 (45.90)
    60–6956 (16.97)15 (15.46)71 (16.63)
Sex
    Male132 (40.00)45 (46.39)177 (41.45)
    Female198 (60.00)52 (53.61)250 (58.55)
Residential area
    Tokyo (met*)124 (37.58)42 (43.30)166 (38.88)
    Tokyo (mun†)54 (16.36)18 (18.56)72 (16.86)
    Chiba42 (12.73)10 (10.31)52 (12.18)
    Kanagawa48 (14.55)12 (12.37)60 (14.05)
    Saitama62 (18.79)15 (15.46)77 (18.03)
Timing of interview
    00/12–01/1125 (7.58)20 (20.62)45 (10.54)
    01/12–02/1165 (19.69)32 (32.99)97 (22.71)
    02/12–03/11134 (40.61)33 (34.02)167 (39.11)
    03/12–04/1199 (30.00)12 (12.37)111 (26.00)
    04/12–05/037 (2.12)0 (0.00)7 (1.64)
Education
    Junior high school‡18 (5.45)9 (9.28)27 (6.32)
    High school§192 (58.19)51 (52.57)243 (56.91)
    College/graduate¶120 (36.36)37 (38.15)157 (36.76)
Marital status
    Single26 (7.88)14 (14.43)40 (9.37)
    Married280 (84.85)79 (81.44)359 (84.07)
    Divorced13 (3.94)1 (1.03)14 (3.28)
    Deceased11 (3.33)3 (3.09)14 (3.28)