The subcohort for dose-response analysis includes all white males from the study cohort who worked at ORNL or Y-12 for at least part of their employment in Oak Ridge nuclear facilities. For the dose-response analyses follow-up began 365 days after first hire at either ORNL or Y-12. Table B1 summarizes the number of individuals, deaths, and person-years lost by imposing a 365 day entry criterion on the cohort for the facility comparison analysis. The remaining tables in this section provide information on the demographic and exposure data of this subcohort. Additional figures are also supplied to provide exposure data information by year and facility.
| Table B1 Impact of 365 Day Entry to Follow-Up |
||||
| Total Number | Total Deaths | Total Cancer Deaths | Total Person-Years | |
| Entering Follow-Up 30 days after hire by either ORNL or Y-12 | 28,770 | 4,821 | 1,138 | 629,636 |
| Entering Follow-Up 365 days after hire by either ORNL or Y-12 | 28,347 | 4,786 | 1,134 | 603,500 |
| Table B2 Distribution of Covariables |
|
| (28,347) White Males |
|
| Birth cohort | |
|
729 (2.6) |
|
2,190 (7.7) |
|
5,059 (17.8) |
|
7,221 (25.5) |
|
13,148 (46.4) |
| Length of Employment | |
|
5,064 (17.9) |
|
23,283 (82.1) |
| Paycode | |
|
20,538 (72.3) |
|
7,809 (27.7) |
| Table B3 Average Years of Employment and Follow-Up |
|
| White Males (28,347) |
|
| Years of Employment | |
| Mean | 11.6 |
| Median | 7.5 |
| Years of Follow-Up | |
| Mean | 21.3 |
| Median | 22.4 |
| Table B4 Distribution by Facility |
|
| Facility | (28,347) Number of Workers (%) |
| ORNL only | 11,127 (39.3%) |
| Y-12 only | 8,525 (30.1%) |
| Multiple facilities* | 8,695 (30.6%) |
|
28,347 |
*At least one of these facilities must by ORNL or Y-12.
| Table B5 Distribution of Unadjusted External Doses with Lags |
||||
| Recorded Dose | Lag 2 | Lag 10 | Lag 20 | |
| Total external dose (cSv) | 36,720 | 35,970 | 31,870 | 20,800 |
| % of total recorded dose for entire study cohort | (90.6) | (88.7) | (78.6) | (51.3) |
| Number of workers by cumulative external dose (%) | ||||
|
21,561 (76.1) | 21,739 (76.7) | 22,550 (79.5) | 24,397 (86.1) |
|
5,438 (19.1) | 5,278 (18.6) | 4,598 (16.3) | 3,156 (11.1) |
|
1,348 (4.8) | 1,330 (4.7) | 1,199 (4.2) | 794 (2.8) |
|
1.30 | 1.27 | 1.12 | 0.73 |
|
0.21 | 0.19 | 0.09 | 0 |
| Quantiles (cSv) | ||||
|
461.87 | 461.87 | 461.74 | 461.20 |
|
0.95 | 0.92 | 0.77 | 0.32 |
|
0 | 0 | 0 | 0 |
|
0 | 0 | 0 | 0 |
| Table B6 Distribution of Annual Internal Exposure Values |
||
| ORNL (1945-1984) | Y-12 (1947-1984) | |
|
116,595 (79.9) | 125,914 (72.9) |
|
9,434 (6.4) | 7,216 (4.2) |
|
19,979 (13.7) | 39,600 (22.9) |
|
146,008 | 172,730 |
|
13,439 (9.2) | 7,060 (4.1) |
|
103,156 (70.7) | 118,854 (68.8) |
|
29,413 (20.1) | 46,816 (27.1) |
|
146,008 | 172,730 |
*Any year of employment before 1951 is considered to be not eligible for internal monitoring.
Figure B1: Percent of ORNL Workers Monitored
Figure B2: Percent of Y-12 Workers Monitored
Figure B3: Percent of ORNL Workers by Annual Internal Exposure
Indicator
Figure B4: Percent of Y-12 Workers by Annual Internal Exposure Indicator
Figure B5: Percent of K-25 Workers by Annual
Internal Exposure Indicator
