The numbers and the causes of withdrawals among women selected, and the medical records obtained in the case-control study of the risk for breast cancer death or subsequent invasive breast cancer after a primary diagnosis of DCIS
| Causes of withdrawal . | Breast cancer death . | . | Subsequent invasive breast cancer . | . | ||
|---|---|---|---|---|---|---|
| . | Cases selected/obtained 113/109 . | Controls selected/obtained 452/427 . | Cases selected/obtained 162/154 . | Controls selected/obtained 638/591 . | ||
| Invasive cancer in the primary lesion | 27 | 29 | 11 | 46 | ||
| Diagnosis made by cytology only | 17 | 0 | 2 | 0 | ||
| History of earlier breast cancer | 2 | 16 | 0 | 33 | ||
| Lobular CIS | 2 | 57 | 25 | 37 | ||
| Benign lesion only | 1 | 5 | 0 | 13 | ||
| Male | 0 | 1 | 1 | 1 | ||
| Recurrence before case | 1 | |||||
| No control available | 0 | 2 | ||||
| No case available | 240 | 146 | ||||
| Cause of death other than breast cancer | 21 | |||||
| Bilateral or generalized recurrence | 5 | |||||
| Causes of withdrawal . | Breast cancer death . | . | Subsequent invasive breast cancer . | . | ||
|---|---|---|---|---|---|---|
| . | Cases selected/obtained 113/109 . | Controls selected/obtained 452/427 . | Cases selected/obtained 162/154 . | Controls selected/obtained 638/591 . | ||
| Invasive cancer in the primary lesion | 27 | 29 | 11 | 46 | ||
| Diagnosis made by cytology only | 17 | 0 | 2 | 0 | ||
| History of earlier breast cancer | 2 | 16 | 0 | 33 | ||
| Lobular CIS | 2 | 57 | 25 | 37 | ||
| Benign lesion only | 1 | 5 | 0 | 13 | ||
| Male | 0 | 1 | 1 | 1 | ||
| Recurrence before case | 1 | |||||
| No control available | 0 | 2 | ||||
| No case available | 240 | 146 | ||||
| Cause of death other than breast cancer | 21 | |||||
| Bilateral or generalized recurrence | 5 | |||||