Table 4.
Hazard ratios (95% CIs) for site-specific cancers by years of PCB exposure with combined exposure categories due to small number of cases adjusted for age, sex, and time period ( Danish residents).
| Cancer site (ICD-10) | Continuous | Nonexposed | Exposed | |||
|---|---|---|---|---|---|---|
| Cases (n) | HR (95% CI) | Cases (n) | HR (95% CI) | Cases (n) | HR (95% CI) | |
| Mouth (C03–06, C462) | 31 | 1.00 (0.88, 1.15) | 23 | 1.00 | 8 | 1.11 (0.49, 2.47) |
| Pharynx (C09–14) | 50 | 0.86 (0.69, 1.08) | 41 | 1.00 | 9 | 0.70 (0.34, 1.43) |
| Stomach (C16) | 50 | 0.98 (0.88, 1.08) | 40 | 1.00 | 10 | 0.76 (0.38, 1.52) |
| Anus (C21, C26) | 25 | 0.93 (0.75, 1.15) | 18 | 1.00 | 7 | 1.19 (0.50, 2.85) |
| Thyroid gland (C73) | 40 | 0.79 (0.55, 1.13) | 34 | 1.00 | 6 | 0.60 (0.25, 1.43) |
| Non-Hodgkin lymphoma (C82–85, C883–889) | 79 | 0.95 (0.86, 1.05) | 66 | 1.00 | 13 | 0.62 (0.34, 1.13) |
| Multiple myeloma (C90, C880–882) | 32 | 0.75 (0.49, 1.13) | 27 | 1.00 | 5 | 0.57 (0.22, 1.48) |
| Lymphatic leukemia (C91) | 47 | 0.93 (0.80, 1.08) | 37 | 1.00 | 10 | 0.81 (0.40, 1.64) |
| Myeloid leukemia (C92) | 15 | 0.90 (0.66, 1.23) | 9 | 1.00 | 6 | 2.03 (0.72, 5.73) |
Note: CI, confidence interval; HR, hazard ratio; ICD-10, International Statistical Classification of Diseases and Related Health Problems, 10th Revision.