Table 3.
Ratio of lives saved owing to screening to number of radiation-induced cancers and to the number of lives lost owing to radiation-induced breast cancer
| DDREF | MGD (mGy) | Lives saved/induced cancers |
Lives saved/lives lost |
||
|---|---|---|---|---|---|
| Age range = 50–70 years | Age range = 47–73 years | Age range = 50–70 years | Age range = 47–73 years | ||
| 1 | 3a | 30 (22–45) | 28 (21–42) | 156 (110–268) | 145 (102–249) |
| 5b | 18 (13–27) | 17 (13–25) | 94 (66–161) | 87 (61–149) | |
| 10c | 9 (7–13) | 8 (6–13) | 47 (33–80) | 43 (31–75) | |
| 2 | 3a | 60 (45–90) | 56 (42–83) | 312 (220–535) | 290 (205–497) |
| 5b | 36 (27–54) | 33 (25–50) | 187 (132–321) | 174 (123–298) | |
| 10c | 18 (13–27) | 17 (13–25) | 94 (66–161) | 87 (61–149) | |
DDREF, dose and dose effectiveness factor; MGD, mean glandular dose.
The ratios are given for the age ranges 50–70 years and 47–73 years, DDREFs of 1 and 2, three MGDs and a 20% reduction in breast cancer mortality in the invited population. The bracketed values show results for 15–30% reductions in breast cancer mortality.
a
Average MGD for all thicknesses.
b
Average MGD for breasts of thickness 90 mm or greater (1.8% of females with breasts of thickness 90 mm or greater).
c
MGD assuming females with breasts 90 mm or greater have two images per view of the entire breast (<0.1% of females).