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Table 3 Book-keeping for size of total prevalent population

From: Counting drugs to understand the disease: The case of measuring the diabetes epidemic

Gender

Year

P

I

CNI

CI

D 1

D Inc

Diff

Females

1994

3365

416

107

11

207

18

 
 

1995

3464

399

123

10

248

12

-3

 

1996

3501

500

109

12

206

22

9

 

1997

3662

418

94

7

230

23

-24

 

1998

3761

429

114

9

225

19

5

 

1999

3836

486

91

11

223

14

-15

 

2000

3997

521

83

9

209

19

-11

 

2001

4212

547

92

8

213

15

-14

 

2002

4446

581

96

21

237

20

-8

 

2003

4684

656

84

15

244

24

-10

Males

1994

3502

519

94

5

254

23

 
 

1995

3667

469

109

6

226

18

-6

 

1996

3780

563

96

12

228

31

-21

 

1997

4004

504

106

7

239

18

-15

 

1998

4174

571

105

12

235

26

11

 

1999

4396

559

97

11

261

22

-9

 

2000

4580

623

80

17

235

26

-17

 

2001

4867

641

96

18

274

21

-21

 

2002

5131

734

97

25

288

27

-7

 

2003

5453

783

111

15

283

39

-27

  1. Bookkeeping for size of total prevalent population with respect to anti-diabetic treatment, Fyn County, Denmark, 1994–2003. P is prevalence on Jan 1 of the given year, I is number of incident subjects, C NI is number of persons having discontinued treatment without re-initiation in the given year, C I is number of persons having discontinued treatment who re-initiated treatment within the given year, D 1 is number of deaths among treated, and D Inc is number of incident subjects dying before the end of the year. Diff for year Y is P Y - (P Y-1+ I Y-1- C NI, Y-1- D 1,Y-1- D Inc, Y-1), ie. difference between observed and predicted prevalence. Note, that C I does not enter into the computation of Diff since these subjects both leave and re-enter the prevalent pool of subjects in the same year.