Observed deaths and SMRs for selected causes of death among benzene exposed chemical workers, compared to the US population†
| Cause of death (9th revision) | Deaths | SMR | 95% CI |
|---|---|---|---|
| †Non-malignant causes: 1960–96, 2171 workers, 60 506 person-years at risk. Malignant causes: 1940–96, 2266 workers, 82 411 person-years at risk. | |||
| *p<0.05; **p<0.01. | |||
| All causes of death (001–999) | 972 | 0.90** | 0.85 to 0.96 |
| All malignant neoplasms (140–208) | 278 | 0.97 | 0.86 to 1.09 |
| Digestive organs and peritoneum (150–159) | 65 | 0.90 | 0.70 to 1.15 |
| Bronchus, trachea, and lung (162) | 97 | 1.00 | 0.81 to 1.21 |
| Prostate (185) | 22 | 0.95 | 0.59 to 1.43 |
| Kidney (189.0, 189.1, 189.2) | 8 | 1.16 | 0.50 to 2.29 |
| Bladder and other urinary (188, 189.3, 189.4, 189.8, 189.9) | 3 | 0.39 | 0.08 to 1.14 |
| Malignant melanoma of skin (172) | 5 | 1.27 | 0.41 to 2.97 |
| Central nervous system (191, 192) | 7 | 0.93 | 0.37 to 1.92 |
| All lymphatic and haematopoietic tissue (200–208) | 27 | 1.01 | 0.66 to 1.46 |
| Non-Hodgkin’s lymphoma (200.0–200.8, 202.0, 202.8) | 10 | 1.06 | 0.51 to 1.95 |
| Hodgkin’s disease (201) | 2 | 1.01 | 0.12 to 3.63 |
| Multiple myeloma (203) | 3 | 0.72 | 0.15 to 2.10 |
| Leukaemia and aleukaemia (204–208) | 12 | 1.14 | 0.59 to 1.99 |
| Chronic lymphatic leukaemia (204.1) | 1 | 0.42 | 0.01 to 2.36 |
| Acute non-lymphocytic leukaemia (205.0, 206.0, 207.0) | 4 | 1.11 | 0.30 to 2.83 |
| Diseases of blood and blood forming organs (280–289) | 7 | 2.17 | 0.87 to 4.48 |
| Cerebrovascular disease (430–438) | 52 | 0.84 | 0.63 to 1.11 |
| All heart diseases (390–398, 402, 404, 410–429) | 380 | 0.90* | 0.81 to 0.99 |
| Non-malignant respiratory disease (460–519) | 74 | 0.85 | 0.67 to 1.07 |
| All external causes (800–999) | 50 | 0.79 | 0.59 to 1.04 |