TABLE 3.

Comparison of Fitted Background and Excess Solid Cancer Cases in the Techa River Cohort by Dose Category Using Techa River Dosimetry System-2009 and Techa River Dosimetry-2000

	TRDS-2009			TRDS-2000
Dose (Gy) Category	Person-years	Excess cases	Background cases	Person-years	Excess cases	Background cases
0	132,593	0	149.7	132,669	0	149.9
<0.01	386,880	2.9	951.9	535,211	3.9	1430.4
0.01 – <0.05	273,436	10.2	777.9	173,454	7.6	453.2
0.05 – <0.1	63,297	6.8	174.4	21,484	2.3	50.8
0.1 – <0.15	27,651	5.8	80.3	26,451	6.1	73.5
0.15 – <0.3	21,707	6.5	51.5	16,626	5.0	34.1
0.3 – <0.5	21,074	16.1	63.7	21,848	18.0	68.2
≥0.5	1105	1.4	4.0	0	0	0
Total	927,743	49.7	2,253.4	927,743	42.9	2260.1

Note. TRDS, Techa River dosimetry system.