Perceived efficacy of mammography screening to reduce death due to breast cancer in a random sample of 895 women of ages 40 to 80 years residing in Geneva, Switzerland1-150
| In your opinion, does mammography screening prevent death from breast cancer in women over age 50 ? | Number | % | Exact 95% confidence intervals |
| No | 23 | 2.6 | (1.6, 3.8) |
| Yes, about one quarter of deaths | 173 | 19.3 | (16.5, 21.7) |
| Yes, about one half of deaths | 266 | 29.7 | (26.3, 32.3) |
| Yes, about three quarters of deaths | 200 | 22.3 | (19.3, 24.8) |
| Don't know | 233 | 26.0 | (22.8, 28.6) |
↵1-150 Women who reported a history of breast cancer (n=43) or had a missing perceived efficacy of mammography screening (n=14) were excluded.