Size (mm), proportion of grade III cancers, and nodal status by age and screening round for screen detected and interval invasive breast cancer
| Type of attendance . | Age group . | . | . | . | . | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| . | 40-49 . | 50-69 . | 70-74 . | ≥75 . | P* . | |||||
| Invasive cancer | ||||||||||
| First screen | ||||||||||
| Cancers (n) | 245 | 1,711 | 290 | 242 | ||||||
| Mean size (mm) | 18.09 | 16.10 | 16.27 | 15.74 | 0.15 | |||||
| Grade (n) | 254 | 1752 | 294 | 253 | ||||||
| Grade III (%) | 20.87 | 16.67 | 16.67 | 13.83 | 0.09 | |||||
| Nodal status (n) | 254 | 1,753 | 294 | 254 | ||||||
| Node negative (%) | 69.29 | 74.22 | 76.19 | 83.46 | ||||||
| Node positive (%) | 30.71 | 25.78 | 23.81 | 16.54 | <0.001 | |||||
| Subsequent screen | ||||||||||
| Cancers (n) | 66 | 2,040 | 469 | 125 | ||||||
| Mean size (mm) | 17.2 | 13.88 | 13.40 | 13.66 | 0.08 | |||||
| Grade (n) | 69 | 2,061 | 478 | 127 | ||||||
| Grade III (%) | 20.29 | 18.10 | 15.06 | 13.39 | 0.05 | |||||
| Nodal status (n) | 69 | 2,061 | 478 | 127 | ||||||
| Node negative (%) | 71.01 | 80.49 | 84.73 | 90.55 | ||||||
| Node positive (%) | 28.99 | 19.51 | 15.27 | 9.45 | <0.001 | |||||
| Interval cancer | ||||||||||
| Cancers (n) | 112 | 625 | 59 | 24 | ||||||
| Mean size (mm) | 20.64 | 21.39 | 18.61 | 20.75 | 0.52 | |||||
| Grade (n) | 106 | 605 | 55 | 22 | ||||||
| Grade III (%) | 49.06 | 38.18 | 30.91 | 45.45 | 0.06 | |||||
| Nodal status (n) | 126 | 705 | 66 | 27 | ||||||
| Node negative (%) | 24.60 | 15.74 | 28.79 | 40.74 | ||||||
| Node positive (%) | 75.40 | 84.26 | 71.21 | 59.26 | <0.001 | |||||
| Type of attendance . | Age group . | . | . | . | . | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| . | 40-49 . | 50-69 . | 70-74 . | ≥75 . | P* . | |||||
| Invasive cancer | ||||||||||
| First screen | ||||||||||
| Cancers (n) | 245 | 1,711 | 290 | 242 | ||||||
| Mean size (mm) | 18.09 | 16.10 | 16.27 | 15.74 | 0.15 | |||||
| Grade (n) | 254 | 1752 | 294 | 253 | ||||||
| Grade III (%) | 20.87 | 16.67 | 16.67 | 13.83 | 0.09 | |||||
| Nodal status (n) | 254 | 1,753 | 294 | 254 | ||||||
| Node negative (%) | 69.29 | 74.22 | 76.19 | 83.46 | ||||||
| Node positive (%) | 30.71 | 25.78 | 23.81 | 16.54 | <0.001 | |||||
| Subsequent screen | ||||||||||
| Cancers (n) | 66 | 2,040 | 469 | 125 | ||||||
| Mean size (mm) | 17.2 | 13.88 | 13.40 | 13.66 | 0.08 | |||||
| Grade (n) | 69 | 2,061 | 478 | 127 | ||||||
| Grade III (%) | 20.29 | 18.10 | 15.06 | 13.39 | 0.05 | |||||
| Nodal status (n) | 69 | 2,061 | 478 | 127 | ||||||
| Node negative (%) | 71.01 | 80.49 | 84.73 | 90.55 | ||||||
| Node positive (%) | 28.99 | 19.51 | 15.27 | 9.45 | <0.001 | |||||
| Interval cancer | ||||||||||
| Cancers (n) | 112 | 625 | 59 | 24 | ||||||
| Mean size (mm) | 20.64 | 21.39 | 18.61 | 20.75 | 0.52 | |||||
| Grade (n) | 106 | 605 | 55 | 22 | ||||||
| Grade III (%) | 49.06 | 38.18 | 30.91 | 45.45 | 0.06 | |||||
| Nodal status (n) | 126 | 705 | 66 | 27 | ||||||
| Node negative (%) | 24.60 | 15.74 | 28.79 | 40.74 | ||||||
| Node positive (%) | 75.40 | 84.26 | 71.21 | 59.26 | <0.001 | |||||
Two-sided P's from a nonparametric test for trend. n, nonmissing size, nonmissing grade, and nonmissing nodes.