Descriptive characteristics of cases with invasive cancers at more than one anatomical site and controls
| Cases (n=103) | Controls (n=115) | |
| Family history | ||
| Any cancer among 1st degree relative | 61.2% | 55.7% |
| Breast cancer | ||
| Mother | 13.6% | 9.6% |
| Sister | 14.6% | 8.7% |
| Colon cancer | ||
| Parents | 20.3% | 15.7% |
| Sibs | 10.7% | 6.0% |
| Melanoma | ||
| Parents | 4.9% | 3.5% |
| Sibs | 2.0% | 1.7% |
| Mean age at diagnosis of first cancer | 55.5 y | — |
| Mean age at diagnosis of second cancer | 60.7 y | — |
| Percentage of all women | ||
| Breast | 70.8% (73) | — |
| Endometrial | 35.0% (36) | — |
| Colon | 27.0% (28) | — |
| Melanoma | 13.5% (14) | — |
| Ovarian | 8.7% (9) | — |
| Combinations of cancers | — | |
| Breast and endometrial | 16% (17) | — |
| Breast and colon | 12% (13) | — |
| Breast and melanoma | 8.5% (9) | — |
| Colon and endometrial | 7.7% (8) | — |
| Lung and breast | 5.8% (6) | — |
| Breast and ovarian | 4.8% (5) | — |
| Endometrial and ovarian | 3.9% (4) | — |
| Melanoma and colon | 1.9% (2) | — |