Exposure (ppm-yr) | 1934–1979 | 1980–2004 | 1934–2004 | ||||||
---|---|---|---|---|---|---|---|---|---|
Obs | Exp | SMR (95%CI) | Obs | Exp | SMR (95%CI) | Obs | Exp | SMR (95%CI) | |
0 | 2 | 1.06 | 1.89 (0.23–6.83) | 3 | 2.43 | 1.24 (0.25–3.61) | 5 | 3.49 | 1.43 (0.47–3.35) |
(0, 0.5] | 8 | 3.59 | 2.23 (0.96–4.39) | 15 | 12.25 | 1.22 (0.69–2.02) | 23 | 15.84 | 1.45 (0.92–2.18) |
(0.5, 5.5] | 3 | 4.13 | 0.73 (0.15–2.12) | 9 | 9.94 | 0.90 (0.41–1.72) | 12 | 14.07 | 0.85 (0.44–1.49) |
> 5.5 | 2 | 2.56 | 0.78 (0.09–2.82) | 8 | 5.50 | 1.46 (0.63–2.87) | 10 | 8.06 | 1.24 (0.59–2.28) |
Total | 15 | 11.34 | 1.32 (0.74–2.18) | 35 | 30.12 | 1.16 (0.81–1.62) | 50 | 41.46 | 1.21 (0.90–1.59) |