Table 1.
Demographic and Exposure Characteristics of Female Breast Cancer Cases and Cohort Members in the UAW-GM Incidence Cohort Who Were Alive in 1985, Michigan, 1985–2013.
| Cases | Cohort | |||||||
|---|---|---|---|---|---|---|---|---|
|
| ||||||||
| No. | % | Mean (range) | Mean (SD) | No. | % | Mean (range) | Mean (SD) | |
|
| ||||||||
| No. subjects | 221 | 4,503 | ||||||
| No. person-years | 3,519 | 108,595 | ||||||
| Year of birth | 1938 (1907–1959) | 1940 (1893–1961) | ||||||
| Year of hire | 1969 (1942–1979) | 1969 (1940–1981) | ||||||
| Age at hire (years) | 30.2 (18.0–55.1) | 29.3 (16.7–58.0) | ||||||
| Duration of employment (years) | 18.1 (3.2–47.8) | 16.2 (2.9–47.8) | ||||||
| Race | ||||||||
| White | 155 | 70.1 | 3,256 | 72.3 | ||||
| African American | 66 | 29.9 | 1,247 | 27.7 | ||||
| Plant | ||||||||
| Plant 1 | 25 | 11.3 | 509 | 11.3 | ||||
| Plant 2 | 122 | 55.2 | 2,612 | 58.0 | ||||
| Plant 3 | 74 | 33.5 | 1,382 | 30.7 | ||||
| Vital status as of 2013 | ||||||||
| Alive | 132 | 59.7 | 2,947 | 65.5 | ||||
| Deceased | 89 | 40.3 | 1,556 | 34.6 | ||||
| Year of diagnosis | 1999 (1985–2013) | |||||||
| Age at diagnosis (years) | 62.1 (34.8–94.1) | |||||||
| Cumulative exposure (mg/m3-years)a | ||||||||
| Straight | 0.29 (1.08) | 0.20 (1.75) | ||||||
| Soluble | 0.68 (1.28) | 0.51 (1.42) | ||||||
| Synthetic | 0.09 (0.43) | 0.08 (0.44) | ||||||
|
| ||||||||
Abbreviations: UAW-GM, United Autoworkers-General Motors.
a
Cumulative exposure lagged 20 years