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Table 2 The number of prevalent cases detected by various lengths of look-back period in each year (2003–2013) for adenomyosis (%1)

From: The effect of the look-back period for estimating incidence using administrative data

Year

Prevalent cases (n)

Look-back period (years)

Estimated cases (n, %)2

1

2

3

4

5

6

7

8

9

10

11

2003

650

54

8.3

          

116

17.8

2004

648

77

11.9

83

12.8

         

130

20.1

2005

849

105

12.4

130

15.3

140

16.5

        

191

22.5

2006

823

111

13.5

143

17.4

155

18.8

161

19.6

       

204

24.8

2007

925

162

17.5

190

20.5

202

21.8

211

22.8

218

23.6

      

251

27.1

2008

1010

170

16.8

204

20.2

225

22.3

234

23.2

238

23.6

240

23.8

     

298

29.5

2009

1195

241

20.2

287

24.0

309

25.9

332

27.8

340

28.5

348

29.1

352

29.5

    

380

31.8

2010

1393

331

23.8

397

28.5

422

30.3

444

31.9

456

32.7

464

33.3

471

33.8

473

34.0

   

476

34.2

2011

1590

367

23.1

437

27.5

471

29.6

490

30.8

507

31.9

519

32. 6

524

33.0

530

33.3

530

33.3

  

580

36.5

2012

1664

444

26.7

533

32.0

573

34.4

600

36.1

609

36.6

617

37 .1

622

37.4

624

37.5

626

37.6

628

37.7

 

646

38.8

2013

1762

487

27.6

596

33.8

646

36.7

671

38.1

689

39.1

699

39.7

711

40.4

721

40.9

724

41.1

729

41.4

733

41.6

725

41.2

  1. 1 Prevalent cases detected by look-back period divided by prevalent cases
  2. 2 Estimated misclassified cases (n) and the misclassification rate (%) for 11 years look-back period calculated using the prediction model