Table 2 Distribution of observed (O) and expected (E) numbers of childhood leukaemia cases by age and by category of estimated dose due to gaseous discharge in the vicinity of 23 nuclear sites in France (1990–2001)
Estimated dose ( μ Sv y−1) | <0.045 | 0.045–0.072 | 0.072–0.316 | 0.316–1.0 | ⩾1.0 | Total |
|---|---|---|---|---|---|---|
0–4 years | ||||||
O | 111 | 149 | 110 | 19 | 5 | 394 |
E | 134.60 | 145.01 | 109.39 | 20.69 | 5.38 | 415.08 |
SIR | 0.82 | 1.03 | 1.01 | 0.92 | 0.93 | 0.95 |
95% CI | (0.68–0.99) | (0.87–1.21) | (0.83–1.21) | (0.55–1.43) | (0.30–2.17) | (0.86–1.05) |
5–9 years | ||||||
O | 72 | 71 | 52 | 6 | 1 | 202 |
E | 76.81 | 75.63 | 61.02 | 12.49 | 3.27 | 229.22 |
SIR | 0.94 | 0.94 | 0.85 | 0.48 | 0.31 | 0.88 |
95% CI | (0.73–1.18) | (0.73–1.18) | (0.64–1.12) | (0.18–1.05) | (0.01–1.70) | (0.76–1.01) |
10–14 years | ||||||
O | 59 | 41 | 41 | 12 | 1 | 154 |
E | 50.93 | 48.40 | 40.71 | 8.42 | 2.25 | 150.71 |
SIR | 1.16 | 0.85 | 1.01 | 1.42 | 0.44 | 1.02 |
95% CI | (0.88–1.49) | (0.61–1.15) | (0.72–1.37) | (0.74–2.49) | (0.01–2.47) | (0.87–1.20) |
