Table 1 Years of diagnosis and residential history characteristics of study participants. The analyses used data from two existing population-based case-control studies.
From: Spatial-temporal analysis of breast cancer in upper Cape Cod, Massachusetts
Characteristic | Study 1 | Study 2 | Final Dataset |
|---|---|---|---|
Diagnosis/Index Years | 1983–86 | 1987–93 | 1983–93 |
No. of Cases | 207 | 453 | 660 |
No. of Case Residences | 327 | 684 | 1,011 |
Mean No. of Residences per Case | 1.58 | 1.51 | 1.53 |
No. of Controls | 526 | 445 | 971 |
No. of Control Residences | 762 | 704 | 1,466 |
Mean No. of Residences per Control | 1.45 | 1.58 | 1.51 |
Case/Control Ratio | 0.39 | 1.02 | 0.68 |
Total No. of Participants | 733 | 898 | 1,631 |
Total No. of Residences | 1,089 | 1,388 | 2,477 |
Mean No. of Residences per Participants | 1.49 | 1.55 | 1.52 |