Table 2
SMRs, 95% CI, observed deaths (OBS), and expected deaths (EXP), for selected causes of death by peak benzene exposure category
| Number of days with peak exposure over 100 ppm | ||||||||
|---|---|---|---|---|---|---|---|---|
| None | <7 | 7–40 | >40 | |||||
| Cause of death (IDC8 code) | SMR (95% CI) | OBS/EXP | SMR (95% CI) | OBS/EXP | SMR (95% CI) | OBS/EXP | SMR (95% CI) | OBS/EXP |
| All deaths (000–999) | 1.0 (1.0 to 1.0) | 1951/1943.7 | 1.2 (1.0 to 1.4) | 117/98.5 | 1.0 (0.9 to 1.2) | 161/160.6 | 1.0 (0.9 to 1.1) | 202/202.1 |
| All cancer (140–209) | 1.1 (1.0 to 1.2) | 508/465.7 | 1.3 (0.9 to 1.8) | 30/23.8 | 1.2 (0.8 to 1.5) | 46/39.8 | 1.2 (0.9 to 1.5) | 61/51.2 |
| Lung cancer (162) | 1.2 (1.1 to 1.4) | 186/152.1 | 1.8 (1.0 to 3.0) | 15/8.1 | 1.2 (0.8 to 1.5) | 23/13.5 | 1.6 (1.1 to 2.3) | 28/17.6 |
| Central nervous system cancer (191–192) | 1.6 (0.9 to 2.6) | 16/10.1 | 1.8 (0.0 to 10.2) | 1/0.6 | 1.0 (0.0 to 5.8) | 1/1.0 | 0.8 (0.0 to 4.7) | 1/1.2 |
| Hodgkin’s disease (201) | 0.7 (0.1 to 2.4) | 2/3.0 | 0.0 (0.0 to 22.8) | 0/0.2 | 0.0 (0.0 to 14.5 | 0/0.3 | 0.0 (0.0 to 13.1) | 0/0.3 |
| Non-Hodgkin’s lymphoma (200, 202) | 1.4 (0.9 to 2.2) | 20/14.3 | 1.3 (0.0 to 7.4) | 1/0.8 | 0.7 (0.0 to 4.2) | 1/1.3 | 1.8 (0.4 to 5.1) | 3/1.7 |
| Multiple myeloma (203) | 1.2 (0.6 to 2.4) | 9/7.2 | 0.0 (0.0 to 10.2) | 0/0.4 | 1.7 (0.0 to 9.4) | 1/0.6 | 4.0 (0.8 to 11.7) | 3/0.8 |
| Leukaemia (204–207) | 1.0 (0.5 to 1.6) | 15/15.6 | 1.2 (0.0 to 6.8) | 1/0.8 | 0.7 (0.0 to 4.0) | 1/1.4 | 2.7 (0.8 to 6.4) | 5/1.8 |
| Chronic lymphatic (204.1) | 0.9 (0.2 to 2.5) | 3/3.5 | 0.0 (0.0 to 20.6) | 0/0.2 | 0.0 (0.0 to 12.2) | 0/0.3 | 2.5 (0.0 to 13.8) | 1/0.3 |
| Acute non-lymphatic (205.0–206.0) | 1.3 (0.4 to 3.0) | 5/3.9 | 0.0 (0.0 to 10.2) | 0/0.2 | 0.0 (0.0 to 10.4) | 0/0.4 | 4.1 (0.5 to 14.9) | 2/0.5 |
| Benign neoplasms of brain, eye and CNS (224, 225, 238, 743.4) | 0.4 (0.0 to 2.0) | 1/2.79 | 0.0 (0.0 to 26.1) | 0/0.1 | 0.0 (0.0 to 14.1) | 0/0.3 | 0.0 (0.0 to 11.2) | 0/0.3 |
| All heart disease (390–398, 400.1, 400.9, 402, 404, 410–414, 420–429) | 0.9 (0.9 to 1.0) | 709/772.3 | 1.2 (0.9 to 1.6) | 46/39.4 | 0.8 (0.6 to 1.1) | 52/63.7 | 1.0 (0.8 to 1.2) | 79/82.7 |
| Death certificates not obtained | 27 | 0 | 0 | 0 | ||||
| Persons at risk | 4417 | 898 | 690 | 339 | ||||
| Person-years | 129000 | 6991 | 11593 | 11448 | ||||
