Figure 1
Age-specific breast cancer incidence rate per 100,000, by stage, for No Screening and annual screening at ages 50 to 74

Figure 1 Age-specific breast cancer incidence rate per 100,000, by stage, for No Screening and annual screening at ages 50 to 74

Description for Figure 1

In the absence of screening mammography, the incidence of local and regional breast cancer rises from less than 50 per 100,000 women at age 40, to about 300 and 200 per 100,000, respectively, at around age 70, and then levels off. The incidence of in situ and distant breast cancer rises very slowly with age, never approaching 50 per 100,000.

By contrast, with annual screening at ages 50 to 74, the incidence of all stages of breast cancer spikes at age 50, drops sharply, and then rises until age 74. A sudden, sharp drop in incidence when screening ceases is followed by a gradual rise. During the period of annual screening, the incidence of in situ breast cancer is second to the incidence of local breast cancer. Before and after that period, in situ breast cancer is detected less frequently than any other stage of breast cancer.

Source: Canadianized University of Wisconsin Breast Cancer Epidemiology Simulation Model.

Data table for Figure 1
Table summary
This table displays the results of Data table for Figure 1. The information is grouped by Age (appearing as row headers), No screening, Annual screening at ages 50 to 74, BC Cases (In situ), BC Cases (Localized), BC Cases (Regional), BC Cases (Distant) and BC Cases (In Situ), calculated using incidence rate per 100,000 units of measure (appearing as column headers).
Age No screening Annual screening at ages 50 to 74
BC Cases (In situ) BC Cases (Localized) BC Cases (Regional) BC Cases (Distant) BC Cases (In Situ) BC Cases (Localized) BC Cases (Regional) BC Cases (Distant)
incidence rate per 100,000
20 0.00 0.00 0.00 0.00 0 0 0 0
21 0.00 0.55 0.05 0.05 0 1 0 0
22 0.05 0.45 0.40 0.00 0 0 0 0
23 0.05 1.35 0.75 0.05 0 1 1 0
24 0.00 1.50 0.90 0.20 0 2 1 0
25 0.20 2.11 1.60 0.35 0 2 2 0
26 0.15 2.46 1.81 0.25 0 2 2 0
27 0.25 4.37 2.91 0.55 0 4 3 1
28 0.30 4.22 4.27 1.11 0 4 4 1
29 0.50 7.19 5.08 0.75 1 7 5 1
30 0.30 7.19 6.64 1.26 0 7 7 1
31 0.50 9.66 8.36 1.66 1 10 8 2
32 0.71 12.24 9.52 2.47 1 12 10 2
33 0.76 13.66 12.10 2.62 1 14 12 3
34 0.61 17.61 15.39 2.52 1 18 15 3
35 0.56 20.96 15.71 2.37 1 21 16 2
36 0.56 24.12 18.46 3.14 1 24 18 3
37 1.32 30.27 21.01 3.85 1 30 21 4
38 1.27 31.78 24.12 4.41 1 32 24 4
39 1.32 37.65 27.20 4.21 1 38 27 4
40 1.98 42.58 30.54 5.84 2 43 31 6
41 2.14 50.42 33.73 5.90 2 50 34 6
42 2.50 57.17 39.29 6.37 2 57 39 6
43 2.50 61.45 41.54 7.71 3 61 42 8
44 2.81 65.74 43.76 8.33 3 66 44 8
45 3.43 68.83 50.70 8.40 3 69 51 8
46 3.44 72.66 55.42 10.88 3 73 55 11
47 3.96 81.76 59.80 10.54 4 82 60 11
48 3.97 93.07 67.98 12.47 4 93 68 12
49 4.91 103.23 74.55 12.71 5 103 75 13
50 4.66 108.06 80.61 13.62 164 417 115 14
51 4.99 108.49 80.75 15.17 146 210 34 5
52 5.16 120.01 87.74 15.07 147 201 31 6
53 5.13 122.79 92.55 15.75 154 215 28 5
54 5.94 129.86 95.71 18.07 163 229 29 6
55 4.96 136.83 101.16 19.37 169 239 33 5
56 5.99 148.91 107.65 17.71 178 245 37 6
57 7.62 157.83 113.04 19.41 188 265 35 7
58 7.19 162.94 117.46 22.85 198 273 37 7
59 7.77 170.38 126.65 25.37 206 282 40 8
60 7.88 172.75 135.34 23.11 210 298 42 7
61 7.73 183.14 133.55 22.91 218 315 42 7
62 8.57 185.20 142.59 27.03 222 324 47 9
63 9.54 199.05 147.95 26.67 236 324 45 9
64 7.84 206.06 157.07 27.79 236 335 45 9
65 9.18 206.18 156.84 28.29 242 339 48 9
66 7.98 217.47 158.18 31.15 254 353 51 10
67 7.80 225.26 168.32 30.67 258 366 50 9
68 9.24 231.16 173.59 28.31 260 374 53 10
69 9.33 238.83 182.29 30.54 271 391 52 9
70 10.06 239.95 179.54 33.38 287 396 54 10
71 10.88 250.84 193.68 33.52 285 394 56 11
72 11.87 263.89 193.95 34.97 297 408 59 11
73 10.29 259.03 198.26 36.78 291 420 62 11
74 12.01 256.58 205.18 34.09 290 423 56 10
75 11.97 260.72 200.92 36.47 8 136 55 9
76 10.75 269.60 208.72 37.19 7 199 129 21
77 11.07 266.64 205.83 37.58 9 225 157 28
78 11.73 272.01 214.10 36.17 8 237 169 32
79 10.04 280.79 220.44 37.45 10 244 179 32
80 12.77 277.18 213.08 37.26 9 245 181 32
81 10.44 262.23 212.96 36.88 10 246 184 31
82 10.83 270.61 207.12 37.87 10 256 181 36
83 10.26 280.10 210.68 31.25 10 248 192 33
84 12.29 268.23 222.09 36.48 13 253 186 34
85 12.62 272.98 210.58 35.08 10 249 195 35
86 10.28 276.22 216.56 38.89 11 244 193 32
87 11.16 275.67 210.02 36.33 11 251 200 33
88 13.00 272.55 206.76 35.40 10 245 185 36
89 10.98 269.63 206.13 34.36 11 253 199 35
90 10.73 257.46 212.19 35.78 10 252 190 31
91 8.35 272.53 211.49 38.26 10 235 198 34
92 11.41 263.36 201.80 32.06 12 247 194 31
93 9.92 248.26 209.02 31.79 11 237 191 29
94 13.12 245.16 210.51 36.22 8 236 187 35
95 8.99 252.39 203.09 34.42 11 251 181 37
96 10.82 233.83 202.51 32.07 11 226 196 32
97 11.81 249.84 173.52 30.89 8 242 182 33
98 14.66 241.83 186.58 45.66 8 222 163 33
Source: Canadianized University of Wisconsin Breast Cancer Epidemiology Simulation Model
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