Cumulative TCDD score (septiles)* | Person-years | Observed | Fitted value | Fitted background | Fitted excess | AF |
<39 | 65 980 | 69 | 63.72 | 72.80 | −9.07 | −0.14 |
39–<224 | 8425 | 25 | 33.58 | 27.74 | 5.84 | 0.17 |
224–<791 | 6165 | 32 | 32.90 | 25.59 | 7.31 | 0.22 |
791–<2120 | 5453 | 29 | 32.06 | 23.80 | 8.25 | 0.26 |
2120–<6140 | 5481 | 33 | 34.40 | 24.50 | 9.91 | 0.29 |
6140–<15 800 | 3789 | 35 | 27.31 | 18.63 | 8.67 | 0.32 |
⩾15 800 | 3907 | 33 | 32.00 | 20.27 | 11.72 | 0.37 |
Total | 99 200 | 256 | 255.97 | 213.33 | 42.64 | 0.17 |
*Cumulative TCDD score under a 15-year lag. Cut points for cumulative TCDD score categories were based on septiles of cumulative exposure of decedents, as in Steenland et al (1999).