Characteristic | Estimated proportion of death from breast cancer prevented by mammography screening | p Value | |||
---|---|---|---|---|---|
One quarter or more Number | One half or more (overestimate) | ||||
Number | Raw % | ||||
Overall | 639 | 466 | 72.9 | ||
Pros (approximate tertiles) | <0.0013-152 | ||||
Lowest | 213 | 140 | 65.7 | ||
Middle | 186 | 136 | 73.1 | ||
Highest | 234 | 188 | 80.3 | ||
Cons (approximate tertiles) | <0.0013-152 | ||||
Lowest | 262 | 215 | 82.1 | ||
Middle | 215 | 149 | 69.3 | ||
Highest | 157 | 99 | 63.1 | ||
Reluctant to pay Swiss Fr 200 for a mammogram3-153 3-154 | 0.03 | ||||
Yes | 67 | 43 | 64.2 | ||
No | 497 | 379 | 76.3 | ||
Perceived an organised programme of mammography screening as useful for themselves | 0.18 | ||||
Yes | 495 | 367 | 74.1 | ||
No | 101 | 68 | 67.3 | ||
Intended to have a mammogram in the future | <0.001 | ||||
Yes | 458 | 353 | 77.1 | ||
No | 144 | 89 | 61.8 | ||
First degree relative with breast cancer | 0.40 | ||||
Yes | 48 | 38 | 79.2 | ||
No | 591 | 428 | 72.4 | ||
Subjective risk of breast cancer as compared with other women | 0.002 | ||||
Lower | 96 | 68 | 70.8 | ||
Similar | 330 | 241 | 73.0 | ||
Higher | 47 | 44 | 93.6 | ||
No opinion | 154 | 103 | 66.9 | ||
Have had a mammogram in the past two years | 0.29 | ||||
Yes | 326 | 244 | 74.8 | ||
No | 313 | 222 | 70.9 | ||
Visit to a gynaecologist during the past year | 0.35 | ||||
Yes | 506 | 375 | 74.1 | ||
No | 84 | 58 | 69.0 | ||
Mammography recommended by a gynaecologist during the past two years | 1.0 | ||||
Yes | 339 | 253 | 74.6 | ||
No | 258 | 193 | 74.8 | ||
Age (y) | 0.15 | ||||
40–49 | 204 | 150 | 73.5 | ||
50–69 | 371 | 276 | 74.4 | ||
70–80 | 64 | 40 | 62.5 | ||
Married | 0.93 | ||||
Yes | 411 | 300 | 73.0 | ||
No | 223 | 164 | 73.5 | ||
Citizenship | <0.001 | ||||
Swiss | 487 | 373 | 76.6 | ||
Other | 149 | 92 | 61.7 | ||
Education level (y) | 0.12 | ||||
⩽10 | 166 | 114 | 68.7 | ||
>10 | 440 | 331 | 75.2 | ||
Monthly net income per person (Swiss Fr)3-154 | 0.39 | ||||
⩽1500 | 114 | 82 | 71.9 | ||
>1500 | 415 | 316 | 76.1 |
↵3-150 Analysis restricted to women who stated that mammography screening prevent about one quater (realistic estimators), or about one half or three fourths of deaths attributable to breast cancer in women over age 50 (overestimators).
3-151 As a result of missing data, numbers may sum to less than 639.
↵3-152 χ2 test of linear trend.
↵3-153 Amount charged for a screening mammogram in Geneva.
↵3-154 In December 2000, 1 Swiss Fr was equal to £0.40.