Skip to main content

Table 1 Age-specific breast cancer cases, person-years and rates for the Mammography Evaluation Cohort from the Norwegian Women and Cancer Study, 2005-2010

From: Overdiagnosis of breast cancer in the Norwegian Breast Cancer Screening Program estimated by the Norwegian Women and Cancer cohort study

  

52-55

56-59

60-64

65-69

70-74

75-79

Total (N = 53363)

Invasive

47

246

343

162

33

32

 

Invasive + DCIS

53

267

400

181

35

36

 

PY

22840

85593

114108

42796

20319

14360

 

Rate

232

312

351

423

172

251

Program (N = 42285)

Invasive

35

206

284

130

26

19

 

Invasive + DCIS

38

225

334

147

28

21

 

PY

17674

70331

94926

33452

15045

8569

 

Rate

215

320

352

439

186

245

Outside program (N = 6479)

Invasive

6

28

42

22

3

6

 

Invasive + DCIS

8

30

49

24

3

8

 

PY

2238

9244

12568

6069

3302

2724

 

Rate

357

325

390

395

91

294

Never (N = 4599)

Invasive

6

12

17

10

4

7

 

Invasive + DCIS

7

12

17

10

4

7

 

PY

2929

6017

6615

3274

1972

3067

 

Rate

239

199

257

305

203

228

  1. DCIS = ductal carcinoma in situ.
  2. PY = person-years.
  3. Rates per 100,000 PY.
  4. Program = received at least one mammogram within the screening program.
  5. Outside program = received a mammogram, but only outside the screening program.
  6. Never = never had a mammogram.