Table 2. Odds ratios and 95% CI by thyroid dose category.

Dose category, Gy	Mean dose, Gy	Cases (N=87)	%	Non-cases (N=11 524)	%	Odds ratioa,b	95% CI
0–0.049	0.02	6	6.9	1985	17.2	1
0.05–0.14	0.09	11	12.6	2554	22.2	1.42	0.51–3.98
0.15–0.29	0.22	13	14.9	2053	17.8	2.09	0.76–5.75
0.30–0.44	0.37	10	11.5	1281	11.1	2.59	0.90–7.47
0.45–0.64	0.54	10	11.5	1034	9.0	3.27	1.13–9.46
0.65–1.24	0.90	16	18.4	1421	12.3	3.95	1.46–10.69
1.25–2.24	1.64	10	11.5	686	6.0	5.27	1.80–15.46
2.25–4.99	3.18	9	10.3	392	3.4	8.70	2.85–26.55
5.00–32.80	8.84	2	2.3	118	1.0	6.75	1.26–36.22

Abbreviations: CI=confidence interval; Gy=gray.

^aModel adjusted for age at risk, gender and oblast of residence (Minsk, Gomel, Other).

^bP-value of the test of linear trend based on mean values for dose categories=<0.01.