Table 3.
Distribution of Exposure to Oil-Based Metalworking Fluids Among Ever-Exposed Workers in the United AutoWorkers–General Motors Cohort (n = 38,666), 1941–1994a
| Exposure Group | No. | % | Mean (SD) |
|---|---|---|---|
| Workers ever exposed | 20,202 | 52 | |
| Exposed person-years | 157,512 | 16 | |
| Duration of exposure, years | 4.1 (6.6) | ||
| Duration of exposure among ever-exposed workers who died of cardiovascular disease, years | 4.3 (6.9) | ||
| Duration of exposure among ever-exposed workers who died of ischemic heart disease, years | 4.5 (7.1) | ||
| Duration of exposure among ever-exposed workers who died of acute myocardial infarction, years | 4.4 (7.0) | ||
| Duration of exposure among ever-exposed workers who died of cerebrovascular disease, years | 4.8 (7.1) | ||
| Duration of exposure among ever-exposed workers who died of any cause, years | 4.2 (6.8) | ||
| Annual average daily exposure among exposed person-years, mg/m3 | 0.2 (0.4) | ||
| Interquartile range of annual average daily exposure, mg/m3 | 0.01, 0.12b | ||
| Median annual average daily exposure among exposed person-years, mg/m3 | 0.03 |
Abbreviation: SD, standard deviation.
a The total number of person-years was 972,476.
b Interquartile range (25th percentile to 75th percentile).