Table 1

Distribution of age and education levels in years for the United States and Japanese study populations^a

	United States			Japan
		Cases (n = 371)	Controls (n = 373)	Cases (n = 410)	Hospital controls (n = 252)	Community controls (n = 411)
Age
≤39	1.6	1.3	1.7	2.4	1.5
40–49	5.7	8.6	10.0	15.5	10.0
50–59	20.8	18.5	24.2	34.1	22.1
60–69	42.9	42.4	42.2	35.7	41.1
≥70	29.1	29.2	22.0	12.3	25.3
Total	100	100	100	100	100
Education level in years
<12	17.6	11.5	52.8	43.0	42.4
=12	27.6	22.8	22.6	26.3	19.8
>12	54.9	65.7	24.6	30.7	37.8
Total	100	100	100	100	100

^a Distribution is by percentage.