Table 2.

Male breast cancer cases and deaths, and person years of follow-up, by age at exposure and attained age, using data of Preston et al. (2007) and Ozasa et al. (2012).

Age at exposure (years)	Breast cancer incident cases/deaths Attained age (years)						Person years Attained age
	0–39	40–49	50–59	60–69	70–79	≥ 80	0–39	40–49	50–59	60–69	70–79	≥ 80
Those in either city with known dose (incident cases)
0–19	0	1	2	0	0		231816	115956	95032.7	37203.2	1303.64
20–39	0	0	0	1	1	0	4759.08	29054.8	51543.6	43488.9	27530.9	7270.12
40–49			0	1	0	1			13154.6	39802	25719.2	11321
50–59				0	0	0				9918.88	19097.3	7365.45
60–69					0	0					3177.86	3703.17
≥ 70						0						468.543
Those in either city, possibly with unknown dose (incident cases)
0–19	0	1	2	0	0		246570	124531	102503	41222.1	1476.71
20–39	0	0	0	1	2	0	5593.58	33507.8	58876.6	49815.2	31504.5	8223.99
40–49			0	1	0	2			14604.5	43735.8	28250.9	12297.5
50–59				0	0	0				10859.6	20725.7	7944.78
60–69					0	0					3337.86	3823.55
≥ 70						0						496.141
Those in either city with known dose (deaths)
0–19	0	1	0	1	1		418150	156749	147267	82930.8	15448.1
20–39	0	0	0	0	1	1	25876.4	55010.5	56421.7	47740.6	34072.7	13716.7
40–49		0	0	0	0	1		5996.07	46511.2	44057.8	28841.2	13658.9
50–59			0	0	0	0			5796.36	31886.5	21362.1	8146.53
60–69				0	0	0				2878.1	11670.6	4166.76
≥ 70					0	0					754.569	1685.79