TABLE 1.
Characteristics of the Study Population and Mortality From Absestosis
| Asbestosis (ICD9 501) | |||||||
| No (N = 1772) | Yes (N = 51) | Mortality | |||||
| Characteristic | Median Value* | N | (%) | N | (%) | MRR† | (95% CI)† |
| Sex | |||||||
| Female | NA | 1002 | (98.0) | 20 | (2.0) | 46 | (29–71) |
| Male | NA | 770 | (96.1) | 31 | (3.9) | 121 | (85–172) |
| Age at first employment | |||||||
| <25 yrs | 19 | 761 | (99.0) | 8 | (1.0) | 23 | (11–45) |
| 25–34 yrs | 30 | 440 | (97.8) | 10 | (2.2) | 56 | (30–105) |
| ≥35 yrs | 44 | 571 | (94.5) | 33 | (5.5) | 202 | (144–285) |
| Year of first employment | |||||||
| ≤1960 | 1951 | 529 | (95.3) | 26 | (4.7) | 118 | (80–173) |
| 1961–1968 | 1964 | 675 | (97.2) | 20 | (2.9) | 74 | (48–115) |
| ≥1969 | 1970 | 568 | (99.1) | 5 | (0.9) | 25 | (10–59) |
| Duration of employment | |||||||
| <5 yrs | 0.9 | 1118 | (99.0) | 12 | (1.0) | 24 | (14–43) |
| 5–9 yrs | 7.0 | 293 | (95.8) | 13 | (4.2) | 114 | (66–196) |
| 10–14 yrs | 12.4 | 175 | (93.6) | 12 | (6.4) | 222 | (126–390) |
| ≥15 yrs | 17.5 | 122 | (89.7) | 14 | (10.3) | 422 | (250–712) |
| Time since last employment | |||||||
| <5 yrs | 0.3 | 100 | (93.5) | 7 | (6.5) | 39 | (19–83) |
| 5–14 yrs | 10.3 | 157 | (91.3) | 15 | (8.7) | 92 | (55–152) |
| 15–24 yrs | 20.7 | 227 | (93.4) | 16 | (6.6) | 112 | (69–183) |
| ≥25 yrs | 42.6 | 1288 | (99.0) | 13 | (1.0) | 62 | (36–106) |
CI, confidence interval; MRR, mortality rate ratio; NA, not applicable.
*Median value within each exposure category mortality.
†Per 100,000 person-years.