Virtual Diabetes Register (VDR)

Published online: 30 September 2020

Note: The VDR algorithm was updated in 2017 resulting in a small reduction in the number of people estimated to have diabetes. It is important that the updated numbers are not compared with numbers derived using any previous version of the VDR. Any comparison may result in artificial and inaccurate trends.

Each year the New Zealand Ministry of Health releases national estimates of the prevalence of diabetes based on the VDR. The VDR is an important tool to monitor prevalence of diabetes and support national and local clinical quality improvements.

The VDR contains data about people suspected as having diabetes, identified through their use of diabetes health services. The VDR uses an algorithm to identify these people in data extracted from hospital inpatient and outpatient, laboratory test, and pharmaceutical dispensing data collections. The VDR is collated annually at the end of March. National and regional diabetes prevalence estimates are calculated based on the number of people on the VDR as at 31 December of the previous year – in this case 31 December 2019. People with diabetes who were deceased and those not enrolled in a PHO are excluded from the totals.

Virtual Diabetes Register 2017 revision

In 2016 the algorithm used to create the VDR was assessed against the Auckland TestSafe repository of actual glycaemic test results (for more information read the published article). As a result, improvements to the algorithm were made in early 2017 to create the latest version of the VDR. A comparison of the numbers from the old VDR and the latest version (v686) is shown in the chart below.

Number of people estimated as having diabetes, on the old VDR and the new VDR, 2005–2019

Number of people estimated as having diabetes, on the old VDR and the new VDR, 2005–2019
  Old VDR New VDR
2005 137,815 136,660
2006 147,525 144,747
2007 158,478 154,334
2008 171,025 165,837
2009 182,745 176,389
2010 196,134 187,860
2011 210,759 200,235
2012 224,908 211,591
2013 238,890 220,866
2014 251,478 228,790
2015 260,458 236,073
2016 - 241,463
2017 - 245,680
2018 - 253,480
2019 - 263,938

Note: People who were either not enrolled in a PHO or deceased, as at 31 December of the relevant year, have been excluded.

It is important to note that numbers produced by the algorithm in the old VDR are now obsolete and should not be used, nor compared to the numbers produced by the new VDR algorithm. Please use the numbers published here or request updated numbers or datasets from [email protected].

Number of people in the Virtual Diabetes Register by DHB of domicile, 2010–2019
DHB of domicile 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019
Auckland 18,573 19,647 20,657 21,718 22,836 23,867 24,508 24,586 25,050

26,445

Bay of Plenty 9507 9917 10,241 10,433 10,537 10,330 10,391 10,722 11,169

11,626

Canterbury 18,103 18,706 19,467 20,075 20,664 21,261 21,959 22,531 23,344

24,023

Capital and Coast 9393 10,788 11,899 12,436 12,805 13,119 13,350 13,370 13,823

13,714

Counties Manukau 27,845 29,877 32,092 34,430 36,927 39,007 40,266 41,256 42,867

45,266

Hawke's Bay 6797 7080 7494 7865 8025 8181 8370 8719 8,836

9,113

Hutt Valley 5812 6575 7211 7467 7699 7866 7903 7885 8,126

8,441

Lakes 4340 4547 4793 4928 5178 5430 5589 5677 5,676

5,943

MidCentral 6814 7453 7797 7953 8120 8331 8446 8719 9,066

9,511

Nelson Marlborough 5282 5577 5686 5786 5933 6022 6080 6075 6,089

6,316

Northland 8515 8908 9605 10,425 10,734 10,844 10,952 11,115 11,319

11,625

South Canterbury 2763 2862 2969 3016 3040 3107 3150 3165 3,155

3,189

Southern 12,002 12,672 13,206 13,525 13,578 13,804 14,146 14,355 14,854

15,224

Tairāwhiti 2621 2919 3098 3241 3357 3444 3388 3349 3,349

3,549

Taranaki 6205 6347 6510 6597 6659 6767 6781 6804 6,977

7,032

Waikato 16,548 17,396 18,125 18,895 19,637 20,406 20,998 21767 22,800

23,579

Wairarapa 1919 2075 2198 2218 2228 2223 2199 2205 2,305

2,375

Waitemata 20,296 22,136 23,651 24,959 25,908 27,020 27,796 28173 29,131

31,153

West Coast 1195 1226 1213 1204 1192 1254 1305 1404 1,467

1,549

Whanganui 3045 3255 3420 3471 3533 3616 3744 3837 3,981

4,183

Unknown/Unassigned 285 272 259 224 200 174 142 113 96

82

Total 187,860 200,235 211,591 220,866 228,790 236,073 241,463 245,680 253,480

263,938

Note: People that were either not enrolled in a PHO or were not alive, as at 31 December of the relevant year, have been excluded.

Source: VDR Dec 2019 (v686)

Notes about VDR 2019:

  1. Both people that weren't enrolled in a PHO and were dead (as at 31/12/2019) have been excluded. 
  2. Data was extracted on 30/03/2020.
  3. Due to COVID-19, the complete set of data quality measures were unable to be run in 2019, increasing the risk of minor errors.
Count of people in the Virtual Diabetes Register aged between 15-74, by DHB of domicile and ethnicity, 2019

DHB

Māori

Pacific people

Indian

European / Other

VDR total (age 15-74)

VDR total (all ages)

Percentage of people in the 15-74 age group

Auckland

1,778

5,631

3,806

9,915

21,130

26,445

79.9% 

Bay of Plenty

2,853

245

413

5,043

8,554

11,626

73.6% 

Canterbury

1,775

1,038

592

14,497

17,902

24,023

74.5% 

Capital and Coast

1,422

2,046

883

6,234

10,585

13,714

77.2% 

Counties Manukau

5,585

14,750

5,735

12,132

38,202

45,266

84.4% 

Hawkes Bay

2,382

454

195

3,958

6,989

9,113

76.7% 

Hutt

1,221

1,091

526

3,910

6,748

8,441

79.9% 

Lakes

1,956

200

152

2,361

4,669

5,943

78.6% 

MidCentral

1,455

366

212

5,189

7,222

9,511

75.9% 

Nelson Marlborough

531

111

71

3,741

4,454

6,316

70.5% 

Northland

4,283

200

138

4,307

8,928

11,625

76.8% 

South Canterbury

170

47

39

1,973

2,229

3,189

69.9% 

Southern

1,063

476

221

9,298

11,058

15,224

72.6% 

Tairawhiti

1,578

99

21

1,039

2,737

3,549

77.1% 

Taranaki

1,125

92

117

3,832

5,166

7,032

73.5% 

Waikato

5,325

1,045

1,093

10,989

18,452

23,579

78.3% 

Wairarapa

369

58

35

1,273

1,735

2,375

73.1% 

Waitemata

2,376

4,036

2,601

15,394

24,407

31,153

78.3% 

West Coast

129

18

11

1,013

1,171

1,549

75.6% 

Whanganui

1,010

103

59

2,022

3,194

4,183

76.4%

Unknown/Unassigned

14

6

5

40

65

82

79.3%

Total

38,400

32,112

16,925

118,160

205,597

263,938

77.9%

Source: VDR Dec 2019 (v686)

Notes about VDR 2019:

  1. Both people that weren't enrolled in a PHO and were dead (as at 31/12/2019) have been excluded. 
  2. Data was extracted on 30/03/2020.
  3. Due to COVID-19, the complete set of data quality measures were unable to be run in 2019, increasing the risk of minor errors.
Count of people in the Virtual Diabetes Register, by age-group and ethnicity, 2019

Age-group

Māori

Pacific people

Indian

European/ Other

Total

00-04

29

10

2

79

120

05-09

100

34

13

318

465

10-14

200

92

23

672

987

15-19

387

172

30

953

1,542

20-24

675

361

76

1,333

2,445

25-29

1,024

710

356

2,075

4,165

30-34

1,536

1,140

979

3,127

6,782

35-39

1,943

1,666

1,165

4,015

8,789

40-44

2,515

2,342

1,281

4,918

11,056

45-49

3,858

3,433

1,639

8,325

17,255

50-54

5,040

4,777

2,008

11,839

23,664

55-59

6,223

5,138

2,451

16,630

30,442

60-64

6,063

4,812

2,650

19,705

33,230

65-69

5,324

4,351

2,435

21,823

33,933

70-74

3,873

3,237

1,861

23,580

32,551

75-79

2,412

2,122

1,252

19,466

25,252

80-84

1,383

1,075

686

14,307

17,451

85+

657

544

352

12,256

13,809

Total

43,242

36,016

19,259

165,421

263,938

Source: VDR Dec 2019 (v686)

Notes about VDR 2019:

  1. Both people that weren't enrolled in a PHO and were dead (as at 31/12/2019) have been excluded. 
  2. Data was extracted on 30/03/2020.
  3. Due to COVID-19, the complete set of data quality measures were unable to be run in 2019, increasing the risk of minor errors.
Count of people in the Virtual Diabetes Register, by DHB of domicile and ethnicity, 2019

DHB of domicile

Māori

Pacific people

Indian

European/ Other

Total

Auckland

1,984

6,447

4,453

13,561

26,445

Bay of Plenty

3,292

267

457

7,610

11,626

Canterbury

1,996

1,151

636

20,240

24,023

Capital and Coast

1,594

2,349

1,042

8,729

13,714

Counties Manukau

6,145

16,400

6,536

16,185

45,266

Hawkes Bay

2,688

498

219

5,708

9,113

Hutt

1,340

1,206

605

5,290

8,441

Lakes

2,226

220

169

3,328

5,943

MidCentral

1,656

402

231

7,222

9,511

Nelson Marlborough

623

122

79

5,492

6,316

Northland

4,901

224

150

6,350

11,625

South Canterbury

199

50

40

2,900

3,189

Southern

1,224

531

234

13,235

15,224

Tairawhiti

1,804

112

23

1,610

3,549

Taranaki

1,287

100

122

5,523

7,032

Waikato

5,894

1,172

1,210

15,303

23,579

Wairarapa

438

61

35

1,841

2,375

Waitemata

2,639

4,568

2,935

21,011

31,153

West Coast

155

18

12

1,364

1,549

Whanganui

1,142

110

65

2,866

4,183

Unknown/Unassigned

15

8

6

53

82

Total

43,242

36,016

19,259

165,421

263,938

Source: VDR Dec 2019 (v686)

Notes about VDR 2019:

  1. Both people that weren't enrolled in a PHO and were dead (as at 31/12/2019) have been excluded. 
  2. Data was extracted on 30/03/2020.
  3. Due to COVID-19, the complete set of data quality measures were unable to be run in 2019, increasing the risk of minor errors.
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