Table 5. Observed and expected numbers of cases of leukemia and standardized incidence ratios (SIR) with 95% confidence intervals (CI)—by distance to nuclear power plant^*1.

Zone	Observed*2	Expected*2, 3	SIR	Lower limit of 95% CI	Upper limit of 95% CI
< 5 km	34	24.09	1.41	0.98	1.97
5 to < 10 km	61	62.89	0.97	0.74	1.25
10 to < 30 km	356	364.20	0.98	0.88	1.08
30 to < 50 km	140	140.39	1.00	0.84	1.18
50 to < 70 km	23	27.08	0.85	0.54	1.27
≥ 70 km	5	5.02	1.00	0.32	2.32

^*1 By distance of central point of each community in the study region to nearest NPP (95% CI corresponds to two-sided test at 5% level)

^*2 Leukemias in children under 5 years

^*3 Expected incidence based on known incidence for whole of Germany