Table 1. Characteristics of the cohort population in radio-contaminated buildings (RCB cohort) by solid cancers and leukaemia.

			Solid cancers			Leukaemia
Characteristics	No. of subjects (%)	No. of cases	Cancer casesa	Person- years	Incidence ratea	Cancer casesa	Person- years	Incidence ratea
Overall	6242 (100)	247	236	97 106	24.3	11	14 7984	0.74
Sex
Male	2968 (47.5)	113	106	45 890	23.1	7	69 849	1.00
Female	3274 (52.5)	134	130	51 216	25.38	4	78 135	0.51
Age at initial exposure (years)
<20	3907 (62.6)	43	40	58 778	6.81	3	90 191	0.33
20–39	1721 (27.6)	112	108	29 614	36.47	4	43979	0.91
⩾40	614 (9.8)	92	88	8714	100.99	4	13814	2.90
Mean; median (range)	16.9; 9.7 (<0–87)
Cumulative exposure (Taiwan Cumulative Dose; mSv)
<5	2932 (47.0)	79	79	41 671	18.96	0	65 448	0
5–99	2752 (44.1)	122	114	46 137	24.71	8	68 620	1.17
⩾100	558 (8.9)	46	43	9298	46.25	3	13 916	2.16
Mean; median (range)	47.7; 6.3 (<1∼2363)

^aCancers with assumed minimum latent periods (leukaemia: 2 years; solid cancers: 10 years); Incidence rates are per 10 000 person years accounting for assumed minimum latent periods.