Distribution of observed and expected number of deaths, SMR, and 95% confidence intervals (95% CI) by cause among graphite electrode manufacturing workers, 8043 person-years, 1951–88
| Cause of death (ICD-9th codes) | Observed | Expected | SMR | 95% CI |
|---|---|---|---|---|
| All causes | 52 | 76.3 | 0.68 | 0.51 to 0.89 |
| All cancers (140–208) | 22 | 21.8 | 1.01 | 0.63 to 1.53 |
| Oesophagus (150) | 1 | 1.0 | 0.96 | 0.02 to 5.33 |
| Stomach (151) | 6 | 7.5 | 0.80 | 0.29 to 1.73 |
| Liver (155) | 2 | 2.7 | 0.74 | 0.09 to 2.69 |
| Lung (162) | 9 | 3.4 | 2.62 | 1.20 to 4.98 |
| Lymphatic and haematopoietic (200–208) | 4 | 1.2 | 3.46 | 0.94 to 8.86 |
| Leukaemia (204–208) | 2 | 0.5 | 4.02 | 0.49 to 14.52 |
| Multiple myeloma (203) | 2 | 0.2 | 13.37 | 1.62 to 48.29 |
| Other forms of heart disease (420–438) | 7 | 6.2 | 1.13 | 0.46 to 2.33 |
| Cerebrovascular disease (430–438) | 2 | 14.6 | 0.14 | 0.02 to 0.50 |
| Pneumonia (480–486) | 2 | 2.8 | 0.73 | 0.09 to 2.63 |
| Bronchitis, emphysema, and asthma (490–493) | 4 | 1.3 | 3.19 | 0.87 to 8.17 |
| Chronic liver disease and cirrhosis of the liver (571) | 2 | 3.0 | 0.67 | 0.08 to 2.44 |
| Miscellaneous | 13 | 26.6 | 0.49 | 0.26 to 0.84 |