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Frequency of RASSF1A methylation in breast cancer cases and controls
| Sites | Subjects | N | N positive (%) |
|---|---|---|---|
| All | All cases | 61 | 11 (18) |
| New York | Cases | 28 | 7 (25) |
| Sibling controls* | 10 | 2 (20) | |
| Ontario | Cases | 33 | 4 (12) |
| Population based controls ** | 29 | 0 (0) |
Unaffected siblings from high risk families.
Population based healthy controls (age and race-matched).
