Table 4 Mean Ki-67 (%) and mean mitoses/mm2 according to birth year and age at diagnosis
From: Long term trends of breast cancer incidence according to proliferation status
Birth year in categories | ||||
|---|---|---|---|---|
Born before 1929 | Born in 1929 or later | |||
Age | Mean Ki-67 (%) (SD) | Cases (n) | Mean Ki-67 (%) (SD) | Cases (n) |
< 45 | 14.9 (13.6) | 8 | 27.5 (20.1) | 133 |
45–49 | 16.8 (12.2) | 25 | 22.6 (18.9) | 166 |
50–54 | 24.7 (19.1) | 26 | 19.2 (19.1) | 180 |
55–59 | 23.2 (17.2) | 60 | 15.9 (15.7) | 156 |
60–64 | 19.0 (16.7) | 91 | 16.1 (16.1) | 163 |
65–69 | 16.2 (14.4) | 129 | 16.5 (18.0) | 105 |
70–74 | 16.4 (15.9) | 215 | 14.9 (15.0) | 47 |
75–79 | 13.9 (12.2) | 191 | 16.2 (20.0) | 22 |
80–84 | 13.7 (12.9) | 206 | 15.7 (6.2) | 3 |
Age | Mean mitoses/mm2 (SD) | Cases (n) | Mean mitoses/mm2 (SD) | Cases (n) |
< 45 | 6.3 (6.4) | 8 | 6.7 (8.5) | 132 |
45–49 | 4.1 (4.6) | 25 | 5.5 (7.1) | 166 |
50–54 | 7.5 (8.5) | 27 | 4.7 (6.7) | 180 |
55–59 | 6.2 (6.0) | 62 | 3.1 (4.1) | 156 |
60–64 | 5.3 (6.7) | 95 | 3.7 (5.3) | 163 |
65–69 | 4.6 (5.9) | 133 | 4.1 (6.4) | 105 |
70–74 | 5.0 (7.7) | 222 | 3.4 (4.0) | 47 |
75–79 | 3.7 (5.0) | 202 | 2.7 (3.8) | 22 |
80–84 | 3.0 (4.4) | 213 | 1.5 (3.2) | 3 |