| 1 | A | B | C | D | E | F |
| --- | --- | --- | --- | --- | --- | --- |
| 2 | number of screening examinations, number of recalls for non-invasive imaging and no cancer found, and number of negative biopsies, per 1,000 women alive at age 40, by screening strategy |  |  |  |  |  |
| 3 | screening strategy | screening examinations | recalled for no cancer |  | negative biopsies |  |
| 4 |  |  | number | % | number | % |
| 5 | annual 40 to 69 | 27,064 | 2,623 | 9.7 | 276 | 1.0 |
| 6 | annual 40 to 74 | 30,439 | 2,865 | 9.4 | 308 | 1.0 |
| 7 | annual 50 to 69 | 17,405 | 1,528 | 8.8 | 163 | 0.9 |
| 8 | annual 50 to 74 | 20,805 | 1,773 | 8.5 | 195 | 0.9 |
| 9 | biennial 40 to 74 | 15,741 | 1,698 | 10.8 | 276 | 1.8 |
| 10 | biennial 50 to 69 | 8,817 | 895 | 10.2 | 144 | 1.6 |
| 11 | biennial 50 to 74 | 10,887 | 1,069 | 9.8 | 179 | 1.6 |
| 12 | triennial 50 to 69 | 6,188 | 699 | 11.3 | 141 | 2.3 |
| 13 | triennial 50 to 74 | 7,561 | 826 | 10.9 | 173 | 2.3 |
| 14 | annual 40 to 49, biennial 50 to 69 | 18,537 | 1,906 | 10.3 | 258 | 1.4 |
| 15 | annual 40 to 49, biennial 50 to 74 | 20,592 | 2,052 | 10.0 | 292 | 1.4 |

Question: what was the per 1,000 numbers for biennial screening at ages 50 to 69?
Answer: 144

Question: what was the per 1,000 numbers for triennial screening at ages 50 to 69?
Answer: 141

Question: what was the per 1,000 numbers for annual screening at ages 40 to 74?
Answer: 308