Table 2. Estimated odds ratios (OR) with lower limit of one-sided 95% confidence interval (CI) and numbers of cases and controls by distance from nearest nuclear power plant^*1.

Zone	Categorical OR	Lower limit of 95% CI	Cases n	Controls n
< 5 km	2.27	0.80	37	54
5 to < 10 km	1.09	0.40	58	173
10 to < 30 km	1.01	0.38	332	1048
30 to < 50 km	1.11	0.41	135	387
50 to < 70 km	0.90	0.32	27	92
≥ 70 km*2	1.00	–	4	12

^*1 Leukemias in children under 5 years, according to (8)

^*2 Reference category