Size (mm) of invasive cancers diagnosed within BreastScreen Victoria characterized by age and time since previous negative screen
| Time since previous negative screen (mo) . | Age group . | . | . | . | . | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| . | 40-49 . | 50-69 . | 70-74 . | ≥75 . | Total . | |||||
| <27 | ||||||||||
| No. screened | 6,245 | 204,092 | 41,745 | 16,580 | ||||||
| Invasive cancers | ||||||||||
| Cancers (n) | 26 | 1,751 | 414 | 82 | 2,273 | |||||
| Mean size | 16.97 | 13.66 | 13.35 | 12.71 | ||||||
| 27-36 | ||||||||||
| No. screened | 4,124 | 24,897 | 4,165 | 3,000 | ||||||
| Invasive cancers | ||||||||||
| Cancers (n) | 24 | 173 | 36 | 17 | 250 | |||||
| Mean size | 17.25 | 14.17 | 13.08 | 12.41 | ||||||
| ≥37 | ||||||||||
| No. screened | 4,493 | 15,503 | 1,541 | 1,986 | ||||||
| Invasive cancers | ||||||||||
| Cancers (n) | 16 | 116 | 19 | 26 | 177 | |||||
| Mean size | 17.51 | 16.91 | 15.21 | 17.46 | ||||||
| P* | 0.7 | 0.005 | 0.6 | 0.08 | ||||||
| Time since previous negative screen (mo) . | Age group . | . | . | . | . | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| . | 40-49 . | 50-69 . | 70-74 . | ≥75 . | Total . | |||||
| <27 | ||||||||||
| No. screened | 6,245 | 204,092 | 41,745 | 16,580 | ||||||
| Invasive cancers | ||||||||||
| Cancers (n) | 26 | 1,751 | 414 | 82 | 2,273 | |||||
| Mean size | 16.97 | 13.66 | 13.35 | 12.71 | ||||||
| 27-36 | ||||||||||
| No. screened | 4,124 | 24,897 | 4,165 | 3,000 | ||||||
| Invasive cancers | ||||||||||
| Cancers (n) | 24 | 173 | 36 | 17 | 250 | |||||
| Mean size | 17.25 | 14.17 | 13.08 | 12.41 | ||||||
| ≥37 | ||||||||||
| No. screened | 4,493 | 15,503 | 1,541 | 1,986 | ||||||
| Invasive cancers | ||||||||||
| Cancers (n) | 16 | 116 | 19 | 26 | 177 | |||||
| Mean size | 17.51 | 16.91 | 15.21 | 17.46 | ||||||
| P* | 0.7 | 0.005 | 0.6 | 0.08 | ||||||
Two-sided P's from a regression of log size and time since previous negative screen for each age group.