Table 3 Details of primary outcome.
Decision aid n = 472 | Standard brochure n = 529 | P-value | |
|---|---|---|---|
n (%) | n (%) | ||
Knowledge conceptual items, right answers | |||
1. Screening is a mammography you have when you're healthy | 454 (97.4) | 497 (96.0) | 0.1982 |
2. An organized mammography screening program can detect a breast cancer in an early stage and lead to less invasive surgery and treatment | 460 (98.7) | 511 (98.5) | 0.7368 |
3. Regular mammography every two years in women who are well does not prevent the risk of BC | 50 (10.7) | 56 (10.8) | 0.9664 |
4. Women who do not have screening mammography is more likely to die from BC | 444 (95.3) | 492 (94.8) | 0.7287 |
5. A screening mammography does not find every BC | 299 (64.2) | 341 (65.7) | 0.6129 |
6. Not all the women with an abnormal screening mammography result have BC | 463 (99.4) | 512 (98.7) | 0.2705 |
7. Overdiagnosis means that screening finds a BC that would never have caused trouble | 179 (38.3) | 131 (25.2) | <0.0001 |
8. Screening leads some women with a harmless cancer to get treatment they do not need (true) | 177 (37.7) | 138 (26.6) | 0.0002 |
9. The organized mammography screening program, the presence of two expert radiologists increases the ability to identify a BC | 469 (100) | 519 (100) | - |
10. The usefulness of an organized mammography screening program is questioned by some doctors and researchers | 126 (27.2) | 57 (11.0) | <0.0001 |
Knowledge numerical items, right answers For the next few questions, I would like you to imagine 1000 ordinary women who are 50 years old who have participated regularly in organized mammography screening program for 30 years… | |||
1. How many women do you think will avoid dying from BC because of screening? | 92 (19.6) | 137 (26.4) | 0.0117 |
2. How many women do you think will be diagnosed and treated for a BC that is not harmful? | 300 (64.0) | 361 (69.7) | 0.0562 |
3. Now, I would like you to imagine 1000 ordinary women who are 50 years old who have not participated in organized mammography screening program, in their next 30 years…. How many die of BC? | 99 (21.1) | 133 (25.6) | 0.0944 |
Attitude toward BC screening | |||
Positive | 432 (91.5) | 489 (92.4) | 0.0922 |
Intentions toward BC screening | |||
Positive | 461 (98.7) | 502 (97.8) | 0.0230 |
