Table 1.

Numbers of deaths and mortality ratios (MRs, with 95% confidence intervals [CIs]) for total cancer and individual sites for the exposed birth cohort from Okayama prefecture, Japan^*

Period or group	Total	Liver	Pancreas	Lung	Skin	Leukemia
Same 5-y calendar period
No. of deaths in exposed group at age 30–34 y	114	3	5	4	NA	19
MR during 1985–1989 compared with age 25–29y† (95% CI)	1.06 (0.89 to 1.28)	0.26 (0.08 to 0.81)	NE	0.41 (0.15 to 1.09)	—	1.67 (1.07 to 2.63)‡
No. of deaths in exposed group at age 35–39 y	158	12	8	9	NA	9
MR during 1990–1994 compared with age 30–34 y† (95% CI)	0.90 (0.77 to 1.05)	0.55 (0.31 to 0.96)	2.26 (1.13 to 4.51)‡	0.28 (0.15 to 0.54)	—	1.47 (0.77 to 2.83)
No. of deaths in exposed group at age 40–44 y	271	26	13	31	4	9
MR during 1995–1999 compared with 35–39 y† (95% CI)	1.04 (0.92 to 1.17)	0.78 (0.53 to 1.14)	1.04 (0.61 to 1.80)	0.90 (0.63 to 1.28)	NE	1.21 (0.63 to 2.33)
No. of deaths in exposed group at age 45–49 y	438	50	30	49	3	12
MR during 2000–2004 compared with 40–44 y† (95% CI)	0.93 (0.85 to 1.02)	2.49 (1.89 to 3.29)‡	1.47 (1.02 to 2.10)‡	0.64 (0.48 to 0.85)	NE	0.55 (0.31 to 0.97)
No. of deaths in exposed group at ages 15–54 y	1408	125	86	130	10	86
Total MR during 1970–2006 compared with 10–49 y† (95% CI)	0.94 (0.89 to 0.99)	0.95 (0.80 to 1.14)	1.52 (1.23 to 1.87)‡	0.60 (0.50 to 0.71)	4.40 (2.37 to 8.18)‡	0.82 (0.66 to 1.01)
Same 5-y age group
No. of deaths in exposed group at age 30–34 y	114	3	5	4	NA	19
MR comparing 1985–1989 with 1990–1994† (95% CI)	1.12 (0.93 to 1.34)	0.32 (0.10 to 0.99)	3.26 (1.36 to 7.84)‡	0.35 (0.13 to 0.92)	—	3.46 (2.21 to 5.43)‡
No. of deaths in exposed group at age 35–39 y	158	12	8	9	NA	9
MR comparing 1990–1994 with 1995–1999† (95% CI)	1.06 (0.91 to 1.24)	0.78 (0.44 to 1.38)	1.51 (0.75 to 3.02)	0.58 (0.30 to 1.12)	—	1.29 (0.67 to 2.48)
No. of deaths in exposed group at age 40–44 y	271	26	13	31	4	9
MR comparing 1995–1999 with 2000–2004† (95% CI)	0.95 (0.84 to 1.07)	2.39 (1.63 to 3.51)‡	1.37 (0.79 to 2.35)	0.71 (0.50 to 1.00)	NE	0.48 (0.25 to 0.92)
No. of deaths in exposed group at age 15–54 y	1115	92	56	96	7	80
Total MR comparing 1970–2001 with 1975–2006† (95% CI)	0.96 (0.90 to 1.02)	0.97 (0.79 to 1.19)	1.41 (1.08 to 1.83)‡	0.64 (0.53 to 0.79)	2.19 (1.04 to 4.59)‡	0.81 (0.65 to 1.01)

^*NA = data before 1994 are not available; NE = not estimated due to small numbers.

^†Total mortality is for 1970–2006, but individual 5-year comparisons are only shown for 1985–2004 because of small numbers of deaths for ages 15–29 years.

^‡Statistically significantly elevated (P < .05).